SQL tutorials 18: SQL Foreign Key Constraint
SQL Tutorial 18: SQL foreign key constraint.
Topic covered in this tutorial
1. Defining SQL foreign key using create table at column level
2. Defining SQL foreign key using create table at table level
1. Defining SQL foreign key using Alter Table statement
DELETE ROW, MODIFY, UPDATE COLUMN, DROP TABLE in Oracle SQL
Oracle SQL tutorials, How to DELETE ROW, MODIFY, UPDATE COLUMN, DROP TABLE in oracle sql…
MSSQL – How to check if column in table exists
Query that checks if specified column exists in specified table.
More info with ready to copy and paste example
SQL with Oracle 10g XE – Using ALTER TABLE to ADD and DROP Table Columns
In this video I use the ALTER TABLE command to add and delete a new field column from a table. I used the keywords ADD or DROP to make the changes to the table design. The commands I used were:
ALTER TABLE BOOKS
ADD SAMPLE VARCHAR(10);
ALTER TABLE BOOKS
DROP COLUMN S…
SQL: Delete Vs Truncate Vs Drop
In this tutorial, you’ll learn the difference between delete/drop and truncate.
PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation’s procedural extension for SQL and the Oracle relational database. PL/SQL is available in Oracle Database (since version 7), TimesTe…
Oracle Join Tables
by Mohamed El Desouki –
Tel: 00966 553450836
How to select data from more than one table using Join.
Text Book: Fundamentals of Database Systems, 5th Edition, by Elmasri/Navathe, published by Addison-W
oracle create ta…
SQL Server Temp Tables – STORED PROCEDURES with IF EXISTS and DROP TABLE
Discussion of Temporary Tables and STORES PROCEDURES. Do you need to use IF EXISTS and DROP TABLE like with real tables? This video covers four different examples using the same STORED PROCEDURE using a simple temp table example and then several more advanced examples that involve using WHILE loops….
SQL Review Video 4: DROP TABLE
In this video, you learn how to remove a table from the database. First, you may need to remove foreign key constraints on child tables and this is shown also….
Oracle Database11g tutorials 14 : How to CREATE TABLE using sql developer and command prompt
Oracle Database11g tutorials 14
How to Create table using command prompt and Create table using sql developer
0:25 Introduction of Tables in Database
1:03 What is Create Table (Introduction of create table)
1:30 Syntax of Create Table<b…
How to Create and Drop Table in SQL
Follow this easy step by step easy tutorial to learn how to create and drop table in SQL Server via Query Editor.
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SQL Server 2016 new feature – IF EXISTS with ALTER TABLE and DROP stmts
New feature in SQL Server 2016. new IF EXISTS option with ALTER TABLE and DROP statements.
Check the whole SQL Server 2016 series here:
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SQL Server Temp Tables – TSQL Command Line with IF EXISTS and DROP TABLE
Discussion of Temp Tables and persistence and why IF EXISTS and DROP TABLE are not necessary. Temp Tables are created in the tempdb system database in SQL Server. They are persistent but not necessarily long lived. Temp tables hav many similarities to true tables, however they also have special prop…