为什么有个列无效？SQL codeSELECT TOP 7 * FROM TBL_Info WHERE IndexTop 1 AND NOT EXISTS(SELECT TOP
为什么有个列无效？
- SQL code
SELECT TOP 7 * FROM TBL_Info WHERE IndexTop = 1 AND NOT EXISTS (SELECT TOP 1 * FROM TBL_Info WHERE IndexTop = 1 ORDER BY PublishTime DESC) ORDER BY PublicTime DESC
提示PublishTime列无效。不太懂EXISTS用法，怎么改才对呢？谢谢～！
[解决办法]
TBL_Info表里有PublishTime这个列吗？
[解决办法]
那个列名是否不存在？
- SQL code
SELECT TOP 7 * FROM TBL_Info WHERE IndexTop = 1 AND CHECKSUM(*) NOT IN (SELECT TOP 1 CHECKSUM(*) FROM TBL_Info WHERE IndexTop = 1 ORDER BY PublicTime DESC) ORDER BY PublicTime DESC