#Mysql tableedit how to#

The last_name field will be changed to a varchar(55) NULL column and will appear after the contact_type column in the table. This ALTER TABLE example will modify two columns to the contacts table - last_name and first_name.

#Mysql tableedit how to#

Let's look at an example that shows how to modify multiple columns in a MySQL table using the ALTER TABLE statement. It tells MySQL where in the table to position the column, if you wish to change its position. column_definition The modified datatype and definition of the column (NULL or NOT NULL, etc). column_name The name of the column to modify in the table.

table_name The name of the table to modify. The syntax to modify multiple columns in a table in MySQL (using the ALTER TABLE statement) is: ALTER TABLE table_name The first_name column will be created as a varchar(35) NULL column and will appear after the last_name column in the table. The last_name field will be created as a varchar(40) NOT NULL column and will appear after the contact_id column in the table. This ALTER TABLE example will add two columns to the contacts table - last_name and first_name. Let's look at an example that shows how to add multiple columns in a MySQL table using the ALTER TABLE statement. If this parameter is not specified, the new column will be added to the end of the table. It tells MySQL where in the table to create the column. column_definition The datatype and definition of the column (NULL or NOT NULL, etc). new_column_name The name of the new column to add to the table. The syntax to add multiple columns in a table in MySQL (using the ALTER TABLE statement) is: ALTER TABLE table_name