SELECT * FROM t_attr WHERE entity_id = #{entityId} SELECT * FROM t_attr WHERE entity_id = #{entityId} AND attr_key = #{attrKey} SELECT * FROM t_attr WHERE entity_id = #{entityId} SELECT * FROM t_attr WHERE entity_id = #{entityId} AND attr_key IN #{key} DELETE FROM t_attr WHERE entity_id = #{entityId} AND attr_key = #{attrKey}