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You can use modify/change keyword. ALTER TABLE [table] CHANGE COLUMN [column] [column] [column definition] AFTER [column] ALTER TABLE [table] MODIFY COLUMN [column] [column definition] AFTER [column] Eg: ALTER TABLE table_name MODIFY password varchar(20) AFTER id ALTER TABLE table_name MODIFY password varchar(20) varchar(20) AFTER id
Table Options. table_options signifies table options of the kind that can be used in the CREATE TABLE statement, such as ENGINE, AUTO_INCREMENT, AVG_ROW_LENGTH, MAX_ROWS, ROW_FORMAT, or TABLESPACE.. For descriptions of all table options, see Section 15.1.20, “CREATE TABLE Statement”.However, ALTER TABLE ignores DATA DIRECTORY and INDEX DIRECTORY when given as table options.
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.
CREATE TABLE t1 (a INTEGER, b CHAR(10)); To rename the table from t1 to t2: ALTER TABLE t1 RENAME t2; To change column a from INTEGER to TINYINT NOT NULL (leaving the name the same), and to change column b from CHAR(10) to CHAR(20) as well as renaming it from b to c:
Syntax to change column name in MySql: alter table table_name change old_column_name new_column_name data_type(size); Example: alter table test change LowSal Low_Sal integer(4);
With the ALTER TABLE statement, you can rename tables, rename columns, add columns, drop columns, modify column properties, etc. ALTER TABLE syntax. ALTER TABLE table_name [alter_action options], ... The alter_action is a modification action, and it may be: The ADD keyword can be used to add columns, indexes, constraints, etc., including:
You will learn how to use the MySQL ALTER TABLE statement to add a column, alter a column, rename a column, drop a column and rename a table.
