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  2. www.sqlservertutorial.net › sql-server-basics › sqlSQL Server ALTER TABLE ALTER COLUMN By Examples

    In this tutorial, you will learn how to use the SQL Server ALTER TABLE ALTER COLUMN statement to modify a column of a table.

    • Drop Column

      SQL Server ALTER TABLE DROP COLUMN. Summary: in this...

    • Add Column

      The following ALTER TABLE ADD statement appends a new column...

  3. www.w3schools.com › SQl › sql_alterSQL ALTER TABLE Statement - W3Schools

    SQL ALTER TABLE Statement. The ALTER TABLE statement is used to add, delete, or modify columns in an existing table. The ALTER TABLE statement is also used to add and drop various constraints on an existing table.

  4. learn.microsoft.com › en-us › sqlALTER TABLE (Transact-SQL) - SQL Server | Microsoft Learn

    Modifies a table definition by altering, adding, or dropping columns and constraints. ALTER TABLE also reassigns and rebuilds partitions, or disables and enables constraints and triggers. Important. The syntax for ALTER TABLE is different for disk-based tables and memory-optimized tables.

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  6. www.programiz.com › sql › alter-tableSQL ALTER TABLE Statement (With Examples) - Programiz

    • ALTER TABLE Syntax. The syntax of the SQL ALTER TABLE statement is: ALTER TABLE table_name clause supporting_codes; Here, table_name is the name of the table to be modified.
    • ALTER TABLE Operations. We can perform the following operations on a table using the ALTER TABLE command: Add a column. Rename a column. Modify a column. Delete a column.
    • Add Column in a Table. We can add columns in a table using the ALTER TABLE command with the ADD clause. For example, -- add phone column to Customers table ALTER TABLE Customers ADD phone varchar(10);
    • Add Multiple Columns in a Table. We can also add multiple columns at once to a table. For example, -- add phone and age columns to Customers table ALTER TABLE Customers ADD phone varchar(10), age int;

  7. www.techonthenet.com › sql_server › tablesSQL Server: ALTER TABLE Statement - TechOnTheNet

    This SQL Server tutorial explains how to use the ALTER TABLE statement in SQL Server (Transact-SQL) to add a column, modify a column, drop a column, rename a column or rename a table with syntax and examples.

  8. www.sqlservertutorial.net › sql-server-basics › sqlSQL Server ALTER TABLE DROP COLUMN By Practical Examples

    SQL Server ALTER TABLE DROP COLUMN. Summary: in this tutorial, you will learn how to use the SQL Server ALTER TABLE DROP column statement to remove one or more columns from existing table.

  9. www.sqlservertutorial.net › sql-server-basics › sqlSQL Server ALTER TABLE ADD Column - SQL Server Tutorial

    The following ALTER TABLE ADD statement appends a new column to a table: ALTER TABLE table_name. ADD column_name data_type column_constraint; Code language: SQL (Structured Query Language) (sql) In this statement: First, specify the name of the table in which you want to add the new column.