SQL ALTER TABLE Statement | SQL Server Tutorial for Beginners

Publié le: 01 janvier 1970
sur la chaîne: SarinaTech

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Learn SQL ALTER TABLE Statement | SQL Server Tutorial for Beginners
How to ALTER Tables in SQL Server Management Studio
SQL (Structured Query Language) is a standard programming language used to manage and manipulate relational databases. It allows you to interact with the data stored in the database by performing operations like:
Altering: Changing the structure of existing tables (using ALTER).
The SQL ALTER statement is used to modify an existing database object, such as a table. Here are the tags and descriptions for common uses of the ALTER statement:

ALTER TABLE

ADD COLUMN

DROP COLUMN

MODIFY COLUMN

RENAME COLUMN

CHANGE COLUMN

ALTER TABLE: The main keyword used to modify an existing table structure.

ADD COLUMN: Used to add a new column to an existing table.

ALTER TABLE employee
ADD COLUMN education_level VARCHAR(50);

DROP COLUMN: Used to remove an existing column from a table.
ALTER TABLE employees
DROP COLUMN column_name;

These operations help you adjust the structure of your table to accommodate changes like new information or correcting column names.
SQL is essential for anyone working with databases and is widely used in fields like data analysis, web development, and application development
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⌚TimeStamps:
0:00 Intro
0:17 Add new column
2:20 Rename column
3:38 Delete column
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