where 子句限制完全匹配的行，显示部分匹配的行

Posted 2023-03-28

【中文标题】where 子句限制完全匹配的行，显示部分匹配的行

【英文标题】：Where clause to restrict rows which are fully matched, show rows which are partially matched

【发布时间】：2021-01-22 11:56:12

【问题描述】：

我有以下 SQL 查询：

    SELECT 
        job.EngineeringJobNumber, 
        CASE 
           WHEN line.PMVoucherNumber IS NULL THEN 0 
                                             ELSE 1 
        END AS JobLinesMatched
    FROM 
        Request_HDR hdr
    JOIN 
        Request_LINE line ON hdr.RequestId = line.RequestId
    JOIN 
        EngineeringJob job ON hdr.EngineeringJobId = job.EngineeringJobId
    JOIN 
        GL00105 gl ON line.AccountIndex = gl.ACTINDX
    WHERE 
        line.VendorID = 'Vendor' AND job.ApprovalStatus = 5

返回这个：

EngineeringJobNumber	JobLinesMatched
JOB00023	0
JOB00023	0
JOB00023	1
JOB00023	0
JOB00023	0
JOB00011	1
JOB00011	1
JOB00011	1
JOB00011	1
JOB00011	1

我想要实现的是限制工作行完全匹配的行，即该工作的所有行都是 1。

编辑：我仍然需要能够查看未完全匹配的作业的所有行，即 JOB0023 的所有 5 行。

我想我可能需要一个 HAVING 子句？任何帮助表示赞赏。

【问题讨论】：

能否分享示例数据？

Why should I tag my DBMS

我有点迷路了。为什么要返回在所有行中具有相同值的两列？而且您的编辑完全混淆了这个问题。

【参考方案1】：

你可以使用analytical function如下：

select EngineeringJobNumber, JobLinesMatched from
(SELECT job.EngineeringJobNumber,
        CASE WHEN line.PMVoucherNumber IS NULL THEN 0 ELSE 1 END AS JobLinesMatched
        count(CASE WHEN line.PMVoucherNumber is NULL then 0 END) 
            over (partition by job.EngineeringJobNumber) as sm
    FROM Request_HDR hdr
    JOIN Request_LINE line ON hdr.RequestId = line.RequestId
    JOIN EngineeringJob job ON hdr.EngineeringJobId = job.EngineeringJobId
    JOIN GL00105 gl ON line.AccountIndex = gl.ACTINDX
    WHERE line.VendorID = 'Vendor' AND job.ApprovalStatus = 5) t
 WHERE sm > 0

【讨论】：

刚刚编辑了我的问题，因为我仍然需要返回未完全匹配的作业的所有行，包括匹配的行。但这让我更接近。

更新了答案。立即查看

感谢@Popeye，成功了！现在我要去阅读 PARTITION...