将 SQL 服务器查询更改为纯 ANSI SQL 查询

Question

我正在开发一个使用 SQL 语法的数据库系统。但是我无法在下面的代码中使用交叉应用。有没有办法重写这个而不适用？

 declare @rsBuildDetails table(dt datetime, build varchar(255), val varchar(255));

insert into @rsBuildDetails (dt, build, val) 
values ('20100101', '1', 'pass')
      ,('20100102', '2', 'fail')
      ,('20100103', '3', 'pass')
      ,('20100104', '4', 'fail')
      ,('20100105', '5', 'fail')
      ,('20100106', '6', 'fail')
      ,('20100107', '7', 'pass')
      ,('20100108', '8', 'pass')
      ,('20100109', '9', 'pass')
      ,('20100110', '10', 'fail');

with passed as
(
    select * 
    from @rsBuildDetails
    where val='pass'
)
select distinct 
    preFail.dt AS FailedDt,
    postFail.dt AS SecondFailedDt
from 
    passed
cross apply
    (select top 1 
         pre.*
     from 
         @rsBuildDetails as pre
     where 
         pre.dt < passed.dt 
         and pre.val = 'fail'
     order by 
         pre.dt desc) as preFail
cross apply
    (select top 1 
         post.*
     from 
         @rsBuildDetails as post
     where 
         post.dt > passed.dt 
         and post.val = 'fail'
     order by 
         post.dt asc) as postFail

Answer 1

您可能会尝试转移 CTE，并且全部适用于内联子选择：

declare @rsBuildDetails table(dt datetime, build varchar(255), val varchar(255));

insert into @rsBuildDetails (dt, build, val) values 
 ('20100101', '1', 'pass')
,('20100102', '2', 'fail')
,('20100103', '3', 'pass')
,('20100104', '4', 'fail')
,('20100105', '5', 'fail')
,('20100106', '6', 'fail')
,('20100107', '7', 'pass')
,('20100108', '8', 'pass')
,('20100109', '9', 'pass')
,('20100110', '10', 'fail');

select *
from
(
    select distinct
           (
            select top 1 pre.Dt
            from @rsBuildDetails as pre
            where pre.dt<passed.dt 
              and pre.val='fail'
            order by pre.dt desc
           ) as FailedDt
         ,(
            select top 1 post.Dt
            from @rsBuildDetails as post
            where post.dt>passed.dt 
              and post.val='fail'
            order by post.dt asc
          ) AS SecondFailedDt
    from 
    (
        select * 
        from @rsBuildDetails
        where val='pass'
    ) AS passed
) AS tbl
where tbl.FailedDt IS NOT NULL 
  AND tbl.SecondFailedDt IS NOT NULL

将 SQL 服务器查询更改为纯 ANSI SQL 查询

Changing SQL Server query to pure ANSI SQL query

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