Question

我正在将一个项目从MySQL迁移到MSSQL。而且由于我在Mssql方面非标准使用分组，所以无法显示正确的数据。我需要一个建议。


SELECT Count(*) AS stok_adet, s.*, m.*,d.*
FROM stok AS s 
CROSS JOIN mermer_cins AS m 
JOIN stok_durum AS d 
ON s.stok_durum_id = d.stok_durum_id 
WHERE  m.mermer_cins_id = '5' 
AND s.blok_no = 'M6320' 
GROUP BY s.bundle_no, 
s.boy, 
s.yukseklik, 
s.hatali 
ORDER BY s.blok_no ASC, 
s.bundle_no ASC, 
s.stok_tarih DESC

Mysql结果ss：https://i.ibb.co/ssknfwM/mysql.png

我在Mssql端尝试了两种不同的方法。

SELECT COUNT(*) as stok_adet,
       s.bundle_no, s.boy, s.yukseklik, s.hatali
FROM stok s CROSS JOIN
     mermer_cins m JOIN
     stok_durum d
     ON s.stok_durum_id = d.stok_durum_id
WHERE m.mermer_cins_id = '5' AND s.blok_no = 'M6320'
GROUP BY s.bundle_no, s.boy, s.yukseklik, s.hatali;

Mssql第一个结果ss：https://i.ibb.co/d5wxcD7/mssql-first.png

SELECT s.*, m.*,
       (SELECT COUNT(*)
        FROM stok_durum d
        WHERE s.stok_durum_id = d.stok_durum_id
       ) as stok_adet
FROM stok s CROSS JOIN
     mermer_cins m
WHERE m.mermer_cins_id='5' AND s.blok_no='M6320'
ORDER BY s.blok_no ASC, s.bundle_no ASC, s.stok_tarih DESC

Mssql第二个结果ss：https://i.ibb.co/cY2cvMS/mssql-second.png

Answer 1

还有另一种选择：

SELECT sm.*,
       (SELECT COUNT(*)
        FROM stok_durum d
        WHERE sm.stok_durum_id = sm.stok_durum_id
       ) as stok_adet
FROM (SELECT s.*, m.*,
             ROW_NUMBER() OVER (PARTITION BY s.bundle_no, s.boy, s.yukseklik, s.hatali 
                                ORDER BY (SELECT NULL)
                               ) as seqnum
      FROM stok s CROSS JOIN 
           mermer_cins m 
      WHERE  m.mermer_cins_id = '5' AND s.blok_no = 'M6320' 
     ) sm
WHERE sequm = 1 
ORDER BY sm.blok_no ASC, sm.bundle_no ASC, sm.stok_tarih DESC

子查询使用窗口函数来选择任意匹配的行。

sql中的分组我遇到了问题

1 个答案: