>同步数据分配和检索

yeotifhr  于 2021-06-15  发布在  Mysql
关注(0)|答案(2)|浏览(300)

我已经试了好几个小时了,但我真的找不到办法。我有一个mysql脚本,我需要迁移到ms sql 2014,但是,我似乎无法使它工作。据我所知,最大的问题是mysql允许这种指令:

SELECT @row_number = @row_number + 1, hora_int FROM table1;

在检索数据的同时指定一个值,但是ms-sql没有。
我有一个比较大的剧本,有这个问题:

SELECT GLOBAL.year, GLOBAL.month, '1111111' as metric_id, GLOBAL.margin as metric_value FROM (SELECT A.year,
         A.month,
         CASE
           WHEN A.month = 1 THEN (@csum_fdo := A.imp)
           ELSE (@csum_fdo := @csum_fdo + A.imp) END as margin
  FROM (SELECT Act.year, Act.month, Act.imp - Pas.imp as imp
        FROM (SELECT year(tie.date) as year, month(tie.date) as month, sum(importe) as imp
              FROM accounting con,
                   dim_time tie,
                   dim_account cta
              WHERE con.account_date = tie.date
                AND con.account = cta.nivel_10
                AND cta.level_id = '2'
                AND con.subtype_id <> 'O'
              GROUP BY year(tie.date),
                       month(tie.date)) Act,
             (SELECT year(tie.date) as year, month(tie.date) as month, sum(importe) * -1 as imp
              FROM accounting con,
                   dim_time tie,
                   dim_account cta
              WHERE con.account_date = tie.date
                AND con.account = cta.nivel_10
                AND cta.level_id = '3'
                AND con.subtype_id <> 'O'
              GROUP BY year(tie.date),
                       month(tie.date)) Pas
        WHERE Act.year = Pas.year
          AND Act.month = Pas.month) A,
       (SELECT @csum_fdo := 0) E) GLOBAL

有人能告诉我在mssql中重新创建代码需要做什么吗?提前谢谢大家

dzjeubhm

dzjeubhm1#

我最大的问题在于:

CASE
           WHEN A.month = 1 THEN (@csum_fdo := A.imp)
           ELSE (@csum_fdo := @csum_fdo + A.imp) END as margin

但正如戈登·林诺夫所指。这个问题可以通过窗口函数来解决,该函数的正确翻译是:

SUM(A.imp) OVER(PARTITION BY A.Year ORDER BY A.month) as margin

结果比我想象的要容易
非常感谢,我希望它也能帮助其他人

7qhs6swi

7qhs6swi2#

在sql server和(myql8+)中,使用窗口函数。相当于:

SELECT @row_number = @row_number + 1, hora_int
FROM table1
ORDER BY col;

是:

SELECT ROW_NUMBER() OVER (ORDER BY col), hora_int
FROM table1;

如果您提供了示例数据和所需的结果,那么就更容易弄清楚您真正需要的函数。

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