The basic syntax of the ALTER TABLE statement : ALTER TABLE « Table « SQL Server / T-SQL Tutorial

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SQL Server / T-SQL Tutorial » Table » ALTER TABLE

3. 2. 1. The basic syntax of the ALTER TABLE statement


ALTER TABLE table_name [WITH CHECK|WITH NOCHECK]

{ADD new_column_name data_type [column_attributes] |

 DROP COLUMN column_name |

 ALTER COLUMN column_name new_data_type [NULL|NOT NULL] |

 ADD [CONSTRAINT] new_constraint_definition |

 DROP [CONSTRAINT] constraint_name}

3. 2. ALTER TABLE
	3. 2. 1.	The basic syntax of the ALTER TABLE statement
	3. 2. 2.	drop column syntax
	3. 2. 3.	Change the length of the emp_name column in the employee table from varchar(30) to varchar(50)
	3. 2. 4.	Alter table to add a constraint based on IN function
	3. 2. 5.	Altering a Table: A Basic Form
	3. 2. 6.	Alter table to add column
	3. 2. 7.	Alter table to drop a column
	3. 2. 8.	The DROP COLUMN clause provides the ability to drop an existing column of the table.
	3. 2. 9.	ALTER data size for a COLUMN
	3. 2. 10.	Altering a Table: Enhanced Form
	3. 2. 11.	Use ALTER TABLE statement to define the primary key
	3. 2. 12.	Use ALTER TABLE statement to define the foreign key of a table.
	3. 2. 13.	Each declarative integrity constraint can be removed using the DROP clause of the ALTER TABLE statement.
	3. 2. 14.	Expanded nvarchar(20) to nvarchar(300)
	3. 2. 15.	Creating a Computed Column in alter table command
	3. 2. 16.	Create a Table Index

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