Change column definition
Remove the column from the table.
(action will be confirmed)
Set the column as the primary key for the table.
Please note that if you need a primary key consisting of two or more columns, you will need to specify it when
creating the table in MySQLMan. If there is a primary key already existed in the table, then you will receive the
error message Duplicate key name 'key_name'.
Also, if you set a column as the primary by clicking "primary", the column will be set to NOT NULL automatically.
Set the column as a index key for the table.
Set the column as a unique key for the table.