Question

我有两张桌子 Review和ProjectsReview。我想按列更改顺序而不影响结果。初始订单依据审核表的createdDate列。初步查询如下。

SELECT
  *
FROM Review r
WHERE (status IS NULL
OR fstatus = '')
AND (crBy = '100'
OR crByPr = '')
ORDER BY createdDate

查询返回8行。

用户想要使用另一个表中的程序名来更改顺序。获得相同的查询如下。

SELECT
  r.*
FROM Review r
INNER JOIN ProjectsReview rp
  ON rp.rID = r.rID
WHERE (status IS NULL
OR fstatus = '')
AND (crBy = '100'
OR crByPr = '')
ORDER BY prNo, prName

这会返回10行。但是所需的结果只有8行且只有评论表的列。我无法对Review表中的所有列应用group by，因为有data和ntext的数据类型。有没有办法实现这一点，而无需将数据插入临时表并获得不同的值。

Answer 1

试试这个

with cte
as
(
    select
        rn = row_number() over(partition by rID order by prNo,prName),
        rID,
        prNo,
        prName
        from ProjectsReview
)
SELECT r.*
    FROM  Review r  
    inner join cte rp on rp.rID =r.rID
    WHERE (status IS NULL OR fstatus = '') AND (crBy = '100' OR crByPr = '')
        and cte.rn = 1
    ORDER BY prNo,prName

从包含列数据类型（如ntext）的连接查询中的一个表中获取不同的值

1 个答案: