You want to add a new column or delete a column from a table or You want to add multiple columns or delete multiple columns from a table in a single query.
Solution –
Add a column in a Table –
To add a new column in a table, we can use the ALTER TABLE ADD statement.
Syntax –
ALTER TABLE table_name
ADD new_column_name column_definition
Let’s add a new column address in the actors_info table.
ALTER TABLE actors_info
ADD address VARCHAR(80) 
Add Multiple columns in a Table –
To add multiple columns in a table, we can just use the above query and add more column names and their definitions one after another.
ALTER TABLE actors_info
ADD Phone INT,
ADD Awards INT
Delete a Column from a Table –
To drop or delete a column from a table, we can use the ALTER TABLE DROP COLUMN statement.
Syntax –
ALTER TABLE table_name
DROP COLUMN cloumn_name
Let’s drop the address column from the actors_info table.
ALTER TABLE actors_info
DROP COLUMN address
Delete Multiple columns from a table –
To delete multiple columns from a table, we can just use the above query and add more DROP COLUMN column_name one after another.
ALTER TABLE actors_info
DROP COLUMN Phone,
DROP COLUMN Awards
Related Post – ALTER TABLE- Rename Columns and Table names.
If you like this post then please share it with others and subscribe to our blog to get better at SQL.