將SQL Server查詢更改爲純ANSI SQL查詢

Question

我正在使用SQL語法的數據庫系統上工作。但是我無法在下面的代碼中使用交叉應用。有沒有辦法重寫這個沒有適用？

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

你可以嘗試轉移CTE和所有適用於內聯子選擇：

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