The asterisk character returns all the columns of a particular table.
ALTER DATABASE database_name;
ALTER DATABASE statement changes the size or settings of a database. Its syntax varies widely among different database systems.
ALTER USER user
ALTER USER statement changes a user’s system settings such as a password.
BEGIN TRANSACTION statement signifies the beginning of a user transaction. A transaction ends when it is either committed (see
COMMIT TRANSACTION) or canceled (see
ROLLBACK TRANSACTION). A transaction is a logical unit of work.