example2 : UNIQUE (row, col) NOT DEFERRABLE ◦ NOT DEFERRABLE • example3 : UNIQUE (row, col) DEFERRABLE ◦ DEFERRABLE • example4 : UNIQUE (row, col) DEFERRABLE INITIALLY DEFERRED ◦ DEFERRABLE INITIALLY DEFERRED; • example5 : UNIQUE (row, col) DEFERRABLE INITIALLY IMMEDIATE ◦ DEFERRABLE • example6 : UNIQUE (row, col) NOT DEFERRABLE INITIALLY DEFERRED ◦ `ERROR: constraint declared INITIALLY DEFERRED must be DEFERRABLE` • example7 : UNIQUE (row, col) NOT DEFERRABLE INITIALLY IMMEDIATE ◦ NOT DEFERRABLE 試した結果