Question

我有2张桌子

第一张表：联系列：

Customer ID,Project ID1,Project ID2,Project ID3

所以一个联系人会有一行。

第二个表：时间表列

Project ID, Name, Owner, Hours

一个联系人可以有多个条目。

我想将时间表中的项目ID与3列联系表进行匹配。

我正在使用以下查询。

SELECT "Customer ID","Project ID","Project Name","Owner",
        "Hours","Approval Status","Status","Project Manager",
        "Sales Person","Account Manager","Discount %","Hourly Rate",
        "Monthly Budget","Total Budget" 
FROM  "Timesheets" 
    LEFT JOIN "Contacts (Boost Media Group)" 
        ON "Timesheets"."Project ID" = "Contacts (Boost Media Group)"."Zoho Projects ID 1";

但它没有返回所需的结果，因为我无法使用联系表的项目ID2，项目ID3检查它。

我有什么建议可以解决这个问题吗？

Answer 1

如果我错了，请纠正我。当任何条件（Zoho Projects ID 3或Zoho Projects ID 2或Zoho Projects ID 1）与“Timesheets”匹配时，我猜你想要它们。“项目ID”

SELECT "Customer ID","Project ID","Project Name","Owner",
        "Hours","Approval Status","Status","Project Manager",
        "Sales Person","Account Manager","Discount %","Hourly Rate",
        "Monthly Budget","Total Budget" 
FROM  "Timesheets" 
    LEFT JOIN "Contacts (Boost Media Group)" 
        ON "Timesheets"."Project ID" = "Contacts (Boost Media Group)"."Zoho Projects ID 1"
or "Timesheets"."Project ID" = "Contacts (Boost Media Group)"."Zoho Projects ID 2"
or "Timesheets"."Project ID" = "Contacts (Boost Media Group)"."Zoho Projects ID 3"

Answer 2

尝试此查询

SELECT `(Boost Media Group)`.`Customer ID`,`tyshet`.`Project ID`,`tyshet`.`Project Name`,`tyshet`.`Owner`,
        `tyshet`.`Hours`,`tyshet`.`Approval Status`,`tyshet`.`Status`,`tyshet`.`Project Manager`,
        `tyshet`.`Sales Person`,`tyshet`.`Account Manager`,`tyshet`.`Discount %`,`tyshet`.`Hourly Rate`,
        `tyshet`.`Monthly Budget`,`tyshet`.`Total Budget`
FROM  Timesheets as `tyshet`
    LEFT JOIN Contacts as `(Boost Media Group)`
        ON `tyshet`.`Project ID` = `(Boost Media Group)`.`Zoho Projects ID 1`;

将一个表与另一个表mysql的多个列匹配多行

2 个答案: