我下面的SQl语句写的对吗 ?
select SolutionId,SegmentClient,SegmentFunction,SegmentFramework,SegmentConfigure,SegmentCase from teleweb_solution where SegmentClient!='' and SegmentFunction!='' and SegmentFramework!='' and SegmentConfigure!='' and SegmentCase!=''
参考答案:select SolutionId,SegmentClient,SegmentFunction,SegmentFramework,SegmentConfigure,SegmentCase from teleweb_solution where SegmentClient is null and SegmentFunction is null and SegmentFramework is null and SegmentConfigure is null and SegmentCase is null