Question

好的，我正在开发一个查询，可以隔离在其帐户上使用服务的成员两周时间（例如4/1到4/14），然后将其与使用服务的成员列表进行比较在接下来的两周时间内（4/15到4 /），然后确定谁在第一阶段使用了服务，然后在第二阶段没有使用服务。

获取第一周列表的查询可以正常使用：

SELECT DISTINCT SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek1 AND @rvEndWeek1) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))

第二周的查询如下：

SELECT DISTINCT SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek2 AND @rvEndWeek2) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))

我尝试将这两者与“NOT EXISTS”子句放在FROM部分和where部分中，但两者都有问题。任何人都可以建议吗？

Answer 1

您可以使用except返回第一个查询中不在第二个查询中的所有不同行：

SELECT SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek1 AND @rvEndWeek1) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))

except

SELECT SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek2 AND @rvEndWeek2) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))

使用common table expression和not exists()

的备选方案

;with cte as (
SELECT SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek2 AND @rvEndWeek2) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))
)
select distinct SS.memid
FROM            SS INNER JOIN
                         SSUSED ON SS.ssid = SSUSED.ssid INNER JOIN
                         MEMBERS AS MEMBERS_1 ON SS.memid = MEMBERS_1.memid INNER JOIN
                         PRODUCTS ON SS.productid = PRODUCTS.productid INNER JOIN
                         PRODUCTCATS ON PRODUCTS.productcatid = PRODUCTCATS.productcatid INNER JOIN
                         EMPLOYEES ON SSUSED.employeeid = EMPLOYEES.employeeid
WHERE        (MEMBERS_1.siteid = @rvSite) AND (SSUSED.usedate BETWEEN @rvStartWeek1 AND @rvEndWeek1) AND (PRODUCTS.productcatid IN (27, 28, 29, 58, 77, 75, 30, 
                         61, 31, 32, 47, 68))
  and not exists (
    select 1
    from cte
    where ss.memid = cte.memid
    )

SQL Logic用于隔离列表一但不列表二的记录

1 个答案: