![]() ![]() column_definition – The changed type of column data.Ĭonsider an example that shows how to change multiple columns in a PostgreSQL table using the ALTER TABLE statement.Syntax to change multiple columns in a table in PostgreSQL (using ALTER TABLE):ĪLTER COLUMN column_name TYPE column_definition, This ALTER TABLE example will change the column named notes to varchar (500) data type in the order_details table. column_definition – The changed column data type.Ĭonsider an example that shows how to change a column in a PostgreSQL table using the ALTER TABLE statement. ![]() ![]() column_name – The name of the column to be changed in the table.Syntax to change the column in the table in PostgreSQL (using ALTER TABLE):ĪLTER COLUMN column_name TYPE column_definition The order_date field will be created as a column with a date data type, and the quantity column will be created as a column with an integer data type. This example will add two columns to the order_details table – order_date and quantity. new_column_name – The name of the new column added to the table.Ĭonsider an example that shows how to add multiple columns to a PostgreSQL table using the ALTER TABLE statement.The syntax for adding multiple columns to a table in PostgreSQL (using ALTER TABLE): This PostgreSQL example ALTER TABLE will add a column named order_date to the order_details table. new_column_name – Name of the new column added to the table.Ĭonsider an example that shows how to add a column to a PostgreSQL table using the ALTER TABLE statement.table_name – The name of the table to change.The syntax for adding a column to a table in PostgreSQL (using ALTER TABLE): PostgreSQL Tutorial for Beginners – PostgreSQL ALTER TABLE. ![]()
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