Home
Search results “Oracle not exists sql”
EXIST Function in SQL
 
08:04
Join Discussion: http://www.techtud.com/video-lecture/exist-function-sql IMPORTANT LINKS: 1) Official Website: http://www.techtud.com/ 2) Virtual GATE: http://virtualgate.in/login/index.php Both of the above mentioned platforms are COMPLETELY FREE, so feel free to Explore, Learn, Practice & Share! Our Social Media Links: Facebook Page: https://www.facebook.com/techtuduniversity Facebook Group: https://www.facebook.com/groups/virtualgate Google+ Page: https://plus.google.com/+techtud/posts Last but not the least, SUBSCRIBE our YouTube channel to stay updated about the regularly uploaded new videos.
Views: 35713 Techtud
ORACLE SQL AND PL/SQL INTERVIEW QUESTION : SUBQUERY WITH NULL / NOT IN / NOT EXISTS OR OUTER JOIN
 
08:36
This video demonstrates the oracle sql interview question where one need to use either not in, not exists or an outer join to get the desired result. For example if one is asked to fetch records from department table where department_id is not present in employee table
Views: 1949 Kishan Mashru
095- Oracle SQL 12c: Correlated Subquery / Exists /not exists
 
12:54
تعلم اوراكل حتى الاحتراف EXAM 1Z0-061 EXAM 1Z0-071
Views: 1653 khaled alkhudari
Let's Learn SQL! Lesson 82 : EXIST and NOT EXIST Subqueries
 
03:37
Explore SQL with Tom Coffing of Coffing Data Warehousing! In this lesson, learn about EXIST and NOT EXIST Subqueries!
The SQL EXISTS clause
 
08:52
How to use the EXISTS clause in SQL. For beginners.
Views: 22628 Database by Doug
Урок 27. SQL. Подзапрос EXISTS
 
06:54
Oracle SQL.Подзапрос EXISTS является наиболее сложным типом подзапроса в SQL. Но мы попробуем разобраться, здесь очень важно Осознать, что подзапрос EXIST Является предикатом, возвращает нам либо истину либо ложь, то есть в подзапрос EXIST это критерий того, будет на экран выведена данная строка либо нет. Также подзапрос EXISTS подразумевает внешнее объединение то есть внутренний подзапрос связывается определённым отношением с внешним запросом учебная среда https://apex.oracle.com/pls/apex/ схема: SQLADV польз: student1 пароль: student1 будут работать (student2/ student2, student3/ student3 .... student11/ student11) меню SQL Workshop , SQL Command или используйте http://sqlfiddle.com/ скрипт бд для загрузки в sqlfiddle http://sqladv.ru/dev/sql.txt урок и задания http://sqladv.ru/dev/sqlbasic/l27.txt
Oracle da SQL asoslari 34 NOT IN, NOT EXISTS
 
03:25
Darslar rivojiga hissa qo'shishni istovchilar uchun PayMe: 8600 1309 2342 8959 WEB MONEY ID: Z193564615070 yoki R769659687039
SQL EXISTS VE NOT EXISTS KULLANIMI
 
05:49
SQL: EXISTS Condition This SQL tutorial explains how to use the SQL EXISTS condition with syntax and examples. Click the Try It button next to an example to test it for yourself in our SQL Editor. Description The SQL EXISTS condition is used in combination with a subquery and is considered to be met, if the subquery returns at least one row. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.
Views: 51 gracia heys
MS SQL #19 (EXISTS, NOT EXISTS)
 
07:23
Witam Serdecznie w poradniku do Microsoft SQL Server, operujemy na darmowym oprogramowaniu Sql Server 2014 Management Studio.
Views: 664 Albrecht Xerxes
How to use EXISTS and NOT EXISTS in correlated Subqueries in Sql Server
 
09:53
EXISTS in correlated Subqueries in Sql Server, NOT EXISTS in correlated Subqueries in Sql Server
Views: 40 C Plus+
IN VS EXISTS VS JOIN, performance
 
05:04
This video demonstrates the performance effects of using an exists clause instead of an IN clause, also it shows how we can update a simple sub query having an IN clause with an EXISTS or JOIN statement. It also shows that joining would consider the null data, where as an IN clause would neglect null values. If you want more such videos of exciting and amazing 'difference between' concepts, check out the links below : union and union all : https://youtu.be/n9FqQOd8liY char and varchar2 : https://youtu.be/039qzwjWf4k replace and translate : https://youtu.be/HKYF77BGzOE procedure and function : https://youtu.be/q3LmOenL120 rank and dense_rank : https://youtu.be/WGSX998hZ9M delete and truncate : https://youtu.be/u76wMm2byXo %type and %rowtype : https://youtu.be/MlLUFeZ_3eM
Views: 11730 Kishan Mashru
SQL Tutorial for beginners: Difference Between IN and EXISTS Operators in Oracle
 
06:58
Difference Between IN and EXISTS Operators in Oracle SQL Tutorial SQL Tutorial for beginners PLSQL Tutorial PLSQL Tutorial for beginners PL/SQL Tutorial PL SQL Tutorial PL SQL Tutorial for beginners PL/SQL Tutorial for beginners Oracle SQL Tutorial
Views: 573 TechLake
SQL SELECT - 13 - SUBCONSULTAS: EXISTS
 
03:57
Todo lo que necesitas en: http://tutorialesnet.com Redes Sociales: http://tutorialesnet.com/twitter http://tutorialesnet.com/facebook
Views: 6822 TutorialesNET
35. SQL EXISTS, how EXISTS differ from IN
 
18:49
The SQL EXISTS clause How to use the EXISTS clause in SQL. For beginners. How to use exists statement Hello Friends In this video i'm going to show you how to use exist in subquery step by step.
Views: 669 ProSchool
How to use exists statement
 
03:30
Hello Friends In this video i'm going to show you how to use exist in subquery step by step.
Views: 5904 OCP Technology
SQL Error ORA-00942 Table or View Does Not Exist in Oracle Database
 
05:03
How to use Tab View (Data Dictionary) of Oracle Database to solve the SQL Error ORA-00942 Table or View Does Not Exist error in Oracle Database ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog: http://bit.ly/ora-00942 Previous Tutorial ► ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 6441 Manish Sharma
Oracle Sql : Exists Clause
 
21:26
Topic : Exists Clause 19th Video of this Series Comments/Suggestions are welcome get in touch with us, by mailing [email protected] for Upcoming trainings. This is an Unedited Video from the Live sessions on Sql (RDBMS) I will be posting a complete series of these tutorials on this channel, If you would like to be notified every time i post something ; Please subscribe to this channel and press the bell icon.
Views: 35 CodeSmith 001
PL/SQL tutorial 60: Collection Method EXISTS in Oracle Database by Manish Sharma
 
05:21
RebellionRider presents you the latest PL/SQL Tutorial 60 on Collection method EXISTS by Manish Sharma ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/exists-function Previous Tutorial ► ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ------------------------------------------------------------------------- ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ ___Facebook Official Page of Manish Sharma___ https://www.facebook.com/TheRebellionRider/ ___Facebook Official Page of RebellionRider.com___ https://www.facebook.com/RebellionRider.official/ You can also Email me at for E-mail address please check the About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 6949 Manish Sharma
#2-  Error ORA-01034: ORACLE not available  ORA-27101: shared memory realm does not exist
 
02:39
Question: I am getting the errors ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist. Cause: Oracle was not started up. SOLUTION : START UP DATABASE. #3- Error ORA 01045 user lacks CREATE SESSION privilege HD https://www.youtube.com/watch?v=pLqASraIMxM
Views: 4909 Houssine Formation
MySQL Tutorial #12 in Hindi: SubQuery(Nested Query) with EXISTS and NOT EXISTS Clause
 
11:37
MySQL Tutorial #12 in Hindi: SubQuery(Nested Query) with EXISTS and NOT EXISTS Clause - Solved Examples MySQL tutorial for Beginners MySQL Installation Guide How to Install MySQL on windows 10
ORACLE SQL AND PL/SQL INTERVIEW QUESTION : SUBQUERY WITH IN / EXISTS OR SELF JOIN
 
09:31
This video demonstrates the solution of the oracle sql interview question like, find the employees where there manager's salary is more than 15000. This is a classic example of using a subquery or a self join to get the result.
Views: 2506 Kishan Mashru
Difference between IN and EXISTS clause in database
 
04:18
Difference between IN and EXISTS clause in database
Views: 613 Techie Savy
Pegadinha da Semana Ep. 17 P1 - SQL Exists e Not Exists - Prof. Eduardo Neves 2015
 
26:44
Esta é uma amostra em vídeo de um Curso completo sobre o tema. Mais informações em: http://www.ProvasdeTI.com.br/ Confira também nossa plataforma de simulados para quem está se preparando para Concursos Públicos ou Certificações na área de TI: http://www.Gabaritou.com.br/
Views: 1374 Portal Provas
DIFFERENCES BETWEEN IN AND EXISTS OPERATOR
 
18:11
IN AND EXISTS OPERATORS
Views: 2193 SAINAATTH PITTLA
EXISTS Condition in Oracle Database
 
11:07
#Exists oracle exists vs in, if exists in oracle, oracle not exists vs not in, difference between in and exists in oracle, case when exists oracle, oracle check if record exists, if not exists in oracle, oracle update where exists
Views: 18 Adam Tech
Using Exists Clause With Correlated Subquery in Oracle Database
 
08:07
Exists Clause in Correlated Subqueries with Oracle Database
Views: 26 Adam Tech
17 Oracle 11g  Основы SQL - Выборка данных с использованием усложнённых подзапросов
 
24:09
Модуль 17. Выборка данных с использованием усложнённых подзапросов • Многостолбцовые подзапросы • Использование скалярных подзапросов в SQL • Круг проблем, решаемых при помощи коррелированных подзапросов • Модификация и удаление строк при помощи коррелированных подзапросов • Использование операторов EXISTS и NOT EXISTS • Применение предложения WITH
Views: 224 Tech Net
Understanding Set Comparison Operator in SQL
 
11:15
Join Discussion on: http://www.techtud.com/video-lecture/understanding-set-comparison-operators IMPORTANT LINKS: 1) Official Website: http://www.techtud.com/ 2) Virtual GATE: http://virtualgate.in/login/index.php Both of the above mentioned platforms are COMPLETELY FREE, so feel free to Explore, Learn, Practice & Share! Our Social Media Links: Facebook Page: https://www.facebook.com/techtuduniversity Facebook Group: https://www.facebook.com/groups/virtualgate Google+ Page: https://plus.google.com/+techtud/posts Last but not the least, SUBSCRIBE our YouTube channel to stay updated about the regularly uploaded new videos.
Views: 11276 Techtud
Subqueries in sql   Part 59
 
14:34
In this video we will discuss about subqueries in sql server. Let us understand subqueris with an example. Please create the required tables and insert sample data using the script below. Create Table tblProducts ( [Id] int identity primary key, [Name] nvarchar(50), [Description] nvarchar(250) ) Create Table tblProductSales ( Id int primary key identity, ProductId int foreign key references tblProducts(Id), UnitPrice int, QuantitySold int ) Insert into tblProducts values ('TV', '52 inch black color LCD TV') Insert into tblProducts values ('Laptop', 'Very thin black color acer laptop') Insert into tblProducts values ('Desktop', 'HP high performance desktop') Insert into tblProductSales values(3, 450, 5) Insert into tblProductSales values(2, 250, 7) Insert into tblProductSales values(3, 450, 4) Insert into tblProductSales values(3, 450, 9) Write a query to retrieve products that are not at all sold? This can be very easily achieved using subquery as shown below. Select [Id], [Name], [Description] from tblProducts where Id not in (Select Distinct ProductId from tblProductSales) Most of the times subqueries can be very easily replaced with joins. The above query is rewritten using joins and produces the same results. Select tblProducts.[Id], [Name], [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In this example, we have seen how to use a subquery in the where clause. Let us now discuss about using a sub query in the SELECT clause. Write a query to retrieve the NAME and TOTALQUANTITY sold, using a subquery. Select [Name], (Select SUM(QuantitySold) from tblProductSales where ProductId = tblProducts.Id) as TotalQuantity from tblProducts order by Name Query with an equivalent join that produces the same result. Select [Name], SUM(QuantitySold) as TotalQuantity from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId group by [Name] order by Name From these examples, it should be very clear that, a subquery is simply a select statement, that returns a single value and can be nested inside a SELECT, UPDATE, INSERT, or DELETE statement. It is also possible to nest a subquery inside another subquery. According to MSDN, subqueries can be nested upto 32 levels. Subqueries are always encolsed in paranthesis and are also called as inner queries, and the query containing the subquery is called as outer query. The columns from a table that is present only inside a subquery, cannot be used in the SELECT list of the outer query. Next Video: What to choose for performance? Queries that involve a subquery or a join Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/subqueries-in-sql-part-59.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-59-subqueries-in-sql-server.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 202954 kudvenkat
Oracle PL/SQL - Why does it exist?
 
08:04
Oracle PL/SQL - Why does it exist?
Views: 2439 Chris Ostrowski
EXISTS Operator in SQL Server
 
06:17
Click here to Subscribe to IT PORT Channel : https://www.youtube.com/channel/UCMjmoppveJ3mwspLKXYbVlg Specifies a subquery to test for the existence of rows. In this video you can check Exists and Not Exists with Simple Example
Views: 830 IT Port
Como usar el EXISTS en SQL | Curso SQL Server - #60
 
07:21
Ayúdanos a crecer, comparte, dale like y suscribete al canal! ►[http://goo.gl/TZEYAO]◄ GRACIAS POR TU APOYO Y TU LIKE En este vídeo veremos como utilizar el exists para identificar si el mismo dato esta en dos tablas. EXISTS simplemente verifica si la consulta interna arroja alguna fila. Si lo hace, entonces la consulta externa procede. De no hacerlo, la consulta externa no se ejecuta, y la totalidad de la instrucción SQL no arroja nada. ▼Que es Tutoriales y más? ►Somos una comunidad que crece cada vez mas! Nuestro tema principal es la programación pero también nos interesa compartir sobre cualquier cosa que tenga que ver con tecnología e informatica! ►Cursos, tutoriales, reviews, gameplays y hasta algo de música es parte de lo que podrás encontrar si visitas nuestro canal! ► Ayúdanos a Subtitular este y otros videos para llegar a más personas: https://goo.gl/kEr6xW ▼Nuestros Cursos: ►SQL Server: https://goo.gl/7vMQnD ►C#: https://goo.gl/0NZeqM ►Java: https://goo.gl/VhFRR4 ►VB .Net: https://goo.gl/Gwh6O4 ►VBA: https://goo.gl/TxsZz3 ►Iniciándose en la programación: https://goo.gl/dHcmnM ►►Más cursos y vídeos en el canal!◄◄ ▼Encuentranos aquí: ►Facebook: https://goo.gl/iqIZMn ►Grupo de programadores en Facebook: https://goo.gl/sTvbFz ►Twiter: https://goo.gl/WJRoKR ►Blog: https://goo.gl/EOglPi ▼Tal vez te interese! ►Gana $$$ con tu canal [VISO]: http://bbtv.go2cloud.org/SHQK ►App del canal para tu navegador: https://goo.gl/Czkl9C ►Donativos: http://goo.gl/us1GDG ▼Código y más! ►Repositorio del Query del curso de SQL Server: https://goo.gl/LSig71
Views: 2607 Tecnología Binaria;
How to connect to an Oracle Database? - Database Tutorial 37
 
12:37
Video 37 - How to connect to a Oracle Database? - Database Tutorial 37 This video explains how to connection to an oracle database. The database, which is Oracle 11g has been installed in a Windows 7 computer.
Views: 116898 Sam Dhanasekaran
Understanding Correlated Queries in SQL
 
08:13
Join Discussion: http://www.techtud.com/video-lecture/understanding-correlated-queries-sql IMPORTANT LINKS: 1) Official Website: http://www.techtud.com/ 2) Virtual GATE: http://virtualgate.in/login/index.php Both of the above mentioned platforms are COMPLETELY FREE, so feel free to Explore, Learn, Practice & Share! Our Social Media Links: Facebook Page: https://www.facebook.com/techtuduniversity Facebook Group: https://www.facebook.com/groups/virtualgate Google+ Page: https://plus.google.com/+techtud/posts Last but not the least, SUBSCRIBE our YouTube channel to stay updated about the regularly uploaded new videos.
Views: 47791 Techtud
PL/SQL tutorial 9: IF THEN ELSE (IF-ELSE) Statement in PL/SQL by Manish Sharma
 
04:12
3rd tutorial in the series explaining IF-THEN-ELSE statement in Oracle PL/SQL with Example. Enjoy ------------------------------------------------------------------------ ►►►LINKS◄◄◄ Blog : http://bit.ly/if-then-else Previous Tutorial ► IF THEN Statement https://youtu.be/IWvuFD6eD30 ------------------------------------------------------------------------- ►►►Let's Get Free Uber Cab◄◄◄ Use Referral Code UberRebellionRider and get $20 free for your first ride. ------------------------------------------------------------------------- ►►►Help Me In Getting A Job◄◄◄ ►Help Me In Getting A Good Job By Connecting With Me on My LinkedIn and Endorsing My Skills. All My Contact Info is Down Below. You Can Also Refer Me To Your Company Thanks ------------------------------------------------------------------------- ►Make sure you SUBSCRIBE and be the 1st one to see my videos! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ►►►Find me on Social Media◄◄◄ Follow What I am up to as it happens on https://twitter.com/rebellionrider https://www.facebook.com/imthebhardwaj http://instagram.com/rebellionrider https://plus.google.com/+Rebellionrider http://in.linkedin.com/in/mannbhardwaj/ http://rebellionrider.tumblr.com/ http://www.pinterest.com/rebellionrider/ You can also Email me at for E-mail address please check About section Please please LIKE and SHARE my videos it makes me happy. Thanks for liking, commenting, sharing and watching more of our videos This is Manish from RebellionRider.com ♥ I LOVE ALL MY VIEWERS AND SUBSCRIBERS
Views: 61044 Manish Sharma
How to Start,Stop Pluggable database-Oracle 12C administration
 
09:32
How to Start,Stop Pluggable database-Oracle 12C administration =================================================== Important Command SQL= show con_name; CON_NAME ------------------------------ CDB$ROOT SQL-- sho pdbs; CON_ID CON_NAME OPEN MODE RESTRICTED ---------- ------------------------------ ---------- ---------- 3 PDB MOUNTED SQL alter session set container=PDB;
Views: 5358 ANKUSH THAVALI
What to choose for performance   SubQuery or Joins   Part 62
 
12:26
Text version of the video http://csharp-video-tutorials.blogspot.com/2013/01/what-to-choose-for-performance.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-62-what-to-choose-for-performance.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists What to choose for performance - SubQuery or Joins According to MSDN, in sql server, in most cases, there is usually no performance difference between queries that uses sub-queries and equivalent queries using joins. For example, on my machine I have 400,000 records in tblProducts table 600,000 records in tblProductSales tables The following query, returns, the list of products that we have sold atleast once. This query is formed using sub-queries. When I execute this query I get 306,199 rows in 6 seconds Select Id, Name, Description from tblProducts where ID IN ( Select ProductId from tblProductSales ) At this stage please clean the query and execution plan cache using the following T-SQL command. CHECKPOINT; GO DBCC DROPCLEANBUFFERS; Go DBCC FREEPROCCACHE; GO Now, run the query that is formed using joins. Notice that I get the exact same 306,199 rows in 6 seconds. Select distinct tblProducts.Id, Name, Description from tblProducts inner join tblProductSales on tblProducts.Id = tblProductSales.ProductId Please Note: I have used automated sql script to insert huge amounts of this random data. Please watch Part 61 of SQL Server tutorial, in which we have discussed about this automated script. According to MSDN, in some cases where existence must be checked, a join produces better performance. Otherwise, the nested query must be processed for each result of the outer query. In such cases, a join approach would yield better results. The following query returns the products that we have not sold atleast once. This query is formed using sub-queries. When I execute this query I get 93,801 rows in 3 seconds Select Id, Name, [Description] from tblProducts where Not Exists(Select * from tblProductSales where ProductId = tblProducts.Id) When I execute the below equivalent query, that uses joins, I get the exact same 93,801 rows in 3 seconds. Select tblProducts.Id, Name, [Description] from tblProducts left join tblProductSales on tblProducts.Id = tblProductSales.ProductId where tblProductSales.ProductId IS NULL In general joins work faster than sub-queries, but in reality it all depends on the execution plan that is generated by SQL Server. It does not matter how we have written the query, SQL Server will always transform it on an execution plan. If sql server generates the same plan from both queries, we will get the same result. I would say, rather than going by theory, turn on client statistics and execution plan to see the performance of each option, and then make a decision. In a later video session we will discuss about client statistics and execution plans in detail.
Views: 86468 kudvenkat
Lesson 10 - Query Aliases and ORDER BY (Oracle SQL Certification)
 
19:59
In this lesson you'll learn about Ordering, Concatenating and Aliasing Query Results
Views: 3203 Imtiaz Ahmad
SQL 136 Subselect, EXISTS with Subselects
 
03:37
Explains how EXISTS with subselects work. From http://ComputerBasedTrainingInc.com SQL Course. Learn by doing SQL commands for ANSI Standard SQL, Access, DB2, MySQL, Oracle, PostgreSQL, and SQL Server.
Views: 4859 cbtinc
Oracle SQL Tutorial 13 - How to Add Column Constraints (Attributes)
 
05:55
So far, we have this table declaration: CREATE TABLE users( user_id NUMBER, username VARCHAR(50 CHAR) first_name VARCHAR2(50 CHAR), last_name VARCHAR2(50 CHAR) ) We can run this command see that it works. As we are learning though, we are going to want to be able to recreate our table with different settings and such, but if you try to run this command, it will complain that the table already exists. So we first need to delete this table before we start editing settings. When we get more experienced, we will learn about ways to edit the structure of a table that already exists. To fix this, we can get rid of the table using the DROP TABLE command: DROP TABLE users You can run this every time if you need to practice by adding a semicolon after it. This is how you can tell Oracle that you are putting in another command after it. This is known as a delimiter. When you run the script, it is going to run both commands. Now we can go through and reconsider our table structure. This is fine for starting out because we don't have any important data in our database, but once your database is in production you are not going to want to just drop tables. In the last video we discussed different constraints that you can apply to columns in a database table, but how do you actually apply these when you are creating a table? The first way you define constraints is to put them right after the column in your CREATE TABLE statement. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL ) When we define constraints this way, we usually say we are adding column attributes. If you have two constraints you want to add, you just put one after the other with spaces in between. There is no particular order that is required. CREATE TABLE users( username VARCHAR2(50 CHAR) NOT NULL UNIQUE ) In this situation we have already given the column the NOT NULL and UNIQUE attributes, so we should consider making this a primary key: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY ) As you can see, adding column attributes is super easy. We can add a default like this: CREATE TABLE users( username VARCHAR2(50 CHAR) PRIMARY KEY, account_balance NUMBER DEFAULT 0 ) Note that now we need the comma after the first row. There are a few constraints we did not talk go through an example, specifically foreign keys and check constraints. We will be adding these constraints to our database in future videos. In the mean time, I have a thought for you… Many people prefer to name their column constraints. That way, we can refer to certain constraints by name. For example, we might have a primary key constraint that could be named users_pk. The way we are creating these constraints does not allow for this feature, so in the next video we are going to be discussing different ways to create constraints. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Support me on Patreon! http://www.patreon.com/calebcurry Subscribe to my newsletter: http://bit.ly/JoinCCNewsletter Donate!: http://bit.ly/DonateCTVM2. ~~~~~~~~~~~~~~~Additional Links~~~~~~~~~~~~~~~ More content: http://CalebCurry.com Facebook: http://www.facebook.com/CalebTheVideoMaker Google+: https://plus.google.com/+CalebTheVideoMaker2 Twitter: http://twitter.com/calebCurry Amazing Web Hosting - http://bit.ly/ccbluehost (The best web hosting for a cheap price!)
Views: 19876 Caleb Curry
SQL Tutorial 12 Advanced Subqueries returning multiple columns
 
14:22
SQL Tutorial on Advanced Subqueries returning multiple columns Check out our website: http://www.telusko.com Follow Telusko on Twitter: https://twitter.com/navinreddy20 Follow on Facebook: Telusko : https://www.facebook.com/teluskolearnings Navin Reddy : https://www.facebook.com/navintelusko Follow Navin Reddy on Instagram: https://www.instagram.com/navinreddy20 Subscribe to our other channel: Navin Reddy : https://www.youtube.com/channel/UCxmkk8bMSOF-UBF43z-pdGQ?sub_confirmation=1 Telusko Hindi : https://www.youtube.com/channel/UCitzw4ROeTVGRRLnCPws-cw?sub_confirmation=1
Views: 56319 Telusko
Connect Netbeans IDE 8.0 to Oracle Step By Step
 
10:44
In you database you can insert any thing you want and than retrieve your data from netbeans
Views: 61609 Ad H
Oracle Developer 10g  Installation Problem in Windows 7 and Solution
 
03:07
Oracle Developer 10g Installation Problem in Windows 7 and Solution by Russel Ahasan
Views: 5740 Russel Ahasan
Ms Sql Server Dersleri - EXISTS Kullanımı
 
08:40
Sql server ile geriye true yada false olarak sonuç döndüren EXISTS yapısının kullanımını öğreniyoruz. http://www.yildirimsoker.com/sql-server-dersleri-exists-kullanimi/
Views: 2209 Yıldırım Söker
Oracle SQL Programming Lesson 4 in Jinghpaw Language - Set Operators
 
28:24
Compiling SQL queries using Union, Union All, Intercept, Minus, Where Exists, Where Not Exists Operators against the oracle database tables. Please watch in HD format for better video quality. --append/stack data (union,union all) --UNION removes duplicate rows. --UNION ALL does not remove duplicate rows. --Each SELECT statement within the UNION must have the same number of fields in the result sets with similar data types. select 'foo' as test_column from dual union select 'foo' as test_column from dual; select distinct test_column from (select 'foo' as test_column from dual union all select 'foo' as test_column from dual); Select region_name from regions Union Select region_name from regions; select first_name,last_name,job_id,manager_id,salary,deptment_id from employees where department_id in (20,60); --Union /union all select job_id,manager_id,'DEPT 20' as dept from employees where department_id=20 union all select job_id,manager_id,'DEPT 60' as dept from employees where department_id=60; --intersect returns only the rows common to the results of two queries select 'foo' as test_column from dual intersect select 'foo' as test_column from dual; Select region_name from regions; Select region_name from regions intersect Select region_name from regions; -- minus=except returns the rows from the first query that do not exist in the second query select 'foo' as test_column from dual minus select 'foo' as test_column from dual; Select region_name from regions minus Select region_name from regions; select first_name,last_name,job_id,manager_id,salary,'DEPT 20' as dept from employees where department_id=20 minus select first_name,last_name,job_id,manager_id,salary,'DEPT 60' as dept from employees where department_id=60; --complex compound queries Select department_id, count(*) from employees Where department_id in (20,30,40) Group by department_id; Select department_id, count(*) from employees Where department_id in (20) Group by department_id Union all Select department_id, count(*) from employees Where department_id in (30) Group by department_id Union all Select department_id, count(*) from employees Where department_id in (40) Group by department_id; Select department_id, count(*) from employees Where department_id in (20) Group by department_id intersect Select department_id, count(*) from employees Where department_id in (30) Group by department_id minus Select department_id, count(*) from employees Where department_id in (40) Group by department_id; Select department_id, count(*) from employees Where department_id in (20) Group by department_id Union Select department_id, count(*) from employees Where department_id in (30) Group by department_id Union all Select department_id, count(*) from employees Where department_id in (40) Group by department_id; --where exists, in / not exists, not in select e.last_name, e.department_id, e.salary from employees e where exists (select * from departments d where e.department_id=d.department_id); select e.last_name, e.department_id, e.salary from employees e where e.department_id in (select department_id from departments); select e.last_name, e.department_id, e.salary from employees e where not exists (select * from departments d where e.department_id=d.department_id); select e.last_name, e.department_id, e.salary from employees e where e.department_id not in (select department_id from departments);
Views: 42 Hkau Doi

Pkyek 8th november 2010 men's health
Baclofen 10 mg tab
Prometrium 200 mg suppositories during pregnancy
Medicament diffu 600 mg motrin
Hypothalamus pmg ingredients in aleve