SELECT ( CASE WHEN me_code = #{item.code} THEN #{item.alias} END ) me_code, me_code, table_field, m_id FROM epc_master_element_mapping WHERE m_id = #{id} AND me_code in #{item.code} SELECT table_field FROM epc_master_element_mapping WHERE m_id = #{id} and me_code = #{code} update epc_master_element_mapping m_id=#{mId}, me_code=#{meCode}, table_field=#{tableField}, select me_code,table_field from epc_master_element_mapping where m_id=#{mid}