Question

我正在运行两个SQL查询，每个查询返回一个包含3行的表，我需要执行一个数学运算符以减去两个表中的每一行

这是第一个查询，它向我返回3个具有x值的行，例如

            SELECT COUNT (*) AS MES 
            FROM WorkOrder
            WHERE asset LIKE '%DC1%'
            AND YEAR (workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01'

            UNION ALL

            SELECT COUNT (*) AS MES 
            FROM WorkOrder
            WHERE asset LIKE '%DC2%'
            AND YEAR (workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01'

            UNION ALL

            SELECT COUNT (*) AS MES 
            FROM WorkOrder
            WHERE asset NOT LIKE '%DC1%' AND asset NOT LIKE '%DC2%'
            AND YEAR (workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01

这是第二个查询，它向我返回具有其他值的相同内容

            SELECT COUNT(*) AS MES
            FROM WorkOrder
            WHERE asset LIKE '%DC1%' 
            AND YEAR(workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01'
            AND businessUnit ='MM'

            UNION ALL

            SELECT COUNT(*) AS MES
            FROM WorkOrder
            WHERE asset  LIKE '%DC2%' 
            AND YEAR(workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01'
            AND businessUnit ='MM'

            UNION ALL

            SELECT COUNT(*) AS MES
            FROM WorkOrder
            WHERE asset NOT LIKE '%DC1%' AND asset NOT LIKE '%DC2%'
            AND YEAR(workOrderDate) BETWEEN 2018/11/01 AND 2018/11/31
            OR businessUnit ='MM'
            OR workType = '07'
            OR workType = '08'
            OR workType = '09'
            OR workType = '10'
            OR workType = '01'
            AND businessUnit ='MM'

我需要执行一项从每个查询中减去值的操作，例如

SQL中是否有一种方法可以做到这一点？我只能在同一张表中找到运算符，无法弄清楚该如何执行。

Answer 1

像这样向每个表提供一个行号。

select t1.*, t2.b, t1.mes - t2.mes from
(select *,row_number() over (order by mes) a from table1)t1 join
(select *,row_number() over (order by mes) b from table2)t2 on t1.a = t2.b

如何在两个表之间执行数学运算

1 个答案: