Add new column in mysql

To add a new column in MySQL, you can use the ALTER TABLE statement. Here is the basic syntax:

ALTER TABLE table_name
ADD COLUMN new_column_name data_type;

Here:

• table_name is the name of the table you want to modify.
• new_column_name is the name of the new column you want to add.
• data_type is the data type of the new column (e.g. INT, VARCHAR, DATE, etc.).

For example, to add a new column called age with a data type of INT to a table called users, you would use the following query:

ALTER TABLE users
ADD COLUMN age INT;

This will add a new column called age with a data type of INT to the users table.

You can also specify additional options when adding a column, such as:

• DEFAULT value: specifies the default value for the new column.
• NULL or NOT NULL: specifies whether the new column can contain null values.
• UNIQUE or INDEX: specifies whether the new column should be indexed or unique.

For example:

ALTER TABLE users
ADD COLUMN email VARCHAR(255) NOT NULL DEFAULT '[email protected]';

This will add a new column called email with a data type of VARCHAR(255), not null, and a default value of '[email protected]'.

Note that you can only add a column to the end of the table, not in the middle. If you want to add a column in a specific position, you can use the ALTER TABLE statement with the ADD COLUMN clause and specify the position using the AFTER or BEFORE keyword. For example:

ALTER TABLE users
ADD COLUMN new_column_name INT AFTER existing_column_name;

This will add the new column after the existing_column_name column.