如图
怎么写能把其余两行数据也展示出来
SELCT 'wd011' AS OLD_CODE, 'RT044' AS MEW_CODE
UNION ALL
SELCT 'WD213' AS OLD_CODE, 'RT456' AS MEW_CODE
SELCT 'WD331' AS OLD_CODE, 'RT026' AS MEW_CODE
union all
目前语句加
union
select old_code,new_code from 表
写3个select然后union起来