関連ワード:  postgresql change column type to integer    postgresql change column type integer to varchar    postgres change column type integer to character varying    postgres change column type string to integer    postgres change column type varchar to integer    postgresql change column type from integer to float    postgresql change column type from text to integer    postgresql change column type from integer to bigint    postgresql change column type from integer to serial    postgresql change column type from integer to boolean  
結果 : postgresql change column type to integer