select * from basic_glass_type as a where a.level=1 select * from basic_glass_type as a where a.level=2 ORDER BY a.id ; select * from basic_glass_type as a where a.level=1 ORDER BY a.id desc limit 1; select * from basic_glass_type as a where a.level=2 and a.belong = #{type} ORDER BY a.id desc limit 1; update basic_glass_type as a set a.type_name = #{basicGlassType.typeName} where a.id = #{basicGlassType.id}