How to add a new column to a table - MySQL

To add a new column called age to the clients table, use the following SQL statement:


ALTER TABLE clients ADD age int;

# set default value
ALTER TABLE schools ADD distance decimal(10,2) NOT NULL DEFAULT 10000 AFTER zipcode;

ALTER TABLE clients ADD age int;

# set default value

ALTER TABLE schools ADD distance decimal(10,2) NOT NULL DEFAULT 10000 AFTER zipcode;

The statement will add the age column to the end of the table.

To insert the new column after a specific column, such as column lastname, use this statement:


ALTER TABLE clients ADD age int AFTER lastname;

ALTER TABLE clients ADD age int AFTER lastname;

To insert the new column to the in front of other columns, use this statement:


ALTER TABLE clients ADD age int FIRST;

ALTER TABLE clients ADD age int FIRST;

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