我已经尝试了几个小时来完成这项工作,但我真的找不到办法。我有一个 MySQL 脚本,需要迁移到 MS SQL 2014,但是,我似乎无法使其工作。据我了解,最大的问题是 MySQL 允许这种指令:
SELECT @row_number = @row_number + 1, hora_int FROM table1;
您可以在检索数据的同时赋值,但 MS SQL 不会。
我有一个相对较大的脚本存在这个问题:
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
任何人都可以指出我必须做什么才能在 MS SQL 中重新创建代码吗?先谢谢大家了
最佳答案
在 SQL Server 和 (MyQL 8+) 中,您使用窗口函数。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;
如果您提供示例数据和期望的结果,就更容易找出您真正需要的功能。
关于mysql - 将 MySQL 脚本移植到 MS SQL -> 同时进行数据分配和检索,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53833131/