unionall用法

union all用法举例如下：

SELECT * FROM

(SELECT top 1 left(convert(varchar(100),RECEIVE_TIME,108 ),5) receiveTime, '0' restoreTime,unit_code,unit_name

FROM T_FILE_RECEIVE_RECORD WHERE UNIT_CODE = '123123' and convert(char(100),RECEIVE_TIME,23)='2018-10-06' ORDER BY RECEIVE_TIME DESC

) table1

UNION ALL

SELECT * FROM

(SELECT top 1 '0' receiveTime, left(convert(varchar(100),RESTORE_TIME,108 ),5) restoreTime,unit_code,unit_name

FROM T_FILE_RESTORE_RECORD WHERE UNIT_CODE = '123123' and convert(char(100),restore_time,23)='2018-10-06' ORDER BY restore_time DESC

) table2

扩展资料

将它们作为子查询再ORDER BY查询一次；在第一个结果集中不使用排序，且不用括号分隔，而在第二个结果集后使用ORDER BY。