 
 
 
 
 
 
 
 
 
 
ALTER TABLE table [ * ]
    ADD [ COLUMN ] column type
ALTER TABLE table [ * ]
    ALTER [ COLUMN ] column { SET DEFAULT value | DROP DEFAULT }
ALTER TABLE table [ * ]
    RENAME [ COLUMN ] column TO newcolumn
ALTER TABLE table
    RENAME TO newtable
ALTER TABLE table
    ADD table constraint definition