Sql 在Select查询中使用Like运算符处理另一个Select查询的结果

我有一个带有内部联接的查询，返回4-5行-查询：

select Table1.valstring Prefix
from TestDB.dbo.SomeCompany PC
    INNER JOIN TestDB.dbo.CMCompany CMC ON PC.companyuid = CMC.companyuid
    LEFT OUTER JOIN TestDB.dbo.ATRIBUTE Table1 ON Table1.Contract = CMC.contract AND Table1.attribute = 'SomeThing'
    LEFT OUTER JOIN TestDB.dbo.ATRIBUTE TheRealPrefix ON TheRealPrefix.Contract = CMC.contract AND TheRealPrefix.attribute = 'SomeOtherPrefix'
where secretCode = 'Mistery'

我想将这个查询输入到另一个select查询中，该查询使用like运算符和已经描述的查询的结果

比如说：

    select from taskTable where task like ('%' + select Table1.valstring Prefix
    from TestDB.dbo.SomeCompany PC
        INNER JOIN TestDB.dbo.CMCompany CMC ON PC.companyuid = CMC.companyuid
        LEFT OUTER JOIN TestDB.dbo.ATRIBUTE Table1 ON Table1.Contract = CMC.contract AND Table1.attribute = 'SomeThing'
        LEFT OUTER JOIN TestDB.dbo.ATRIBUTE TheRealPrefix ON TheRealPrefix.Contract = CMC.contract AND TheRealPrefix.attribute = 'SomeOtherPrefix'
    where secretCode = 'Mistery'
)

尝试使用此查询：

select *
from TestDB.dbo.SomeCompany PC
    INNER JOIN TestDB.dbo.CMCompany CMC ON PC.companyuid = CMC.companyuid
    LEFT JOIN TestDB.dbo.ATRIBUTE Table1 ON Table1.Contract = CMC.contract AND Table1.attribute = 'SomeThing'
    LEFT JOIN TestDB.dbo.ATRIBUTE TheRealPrefix ON TheRealPrefix.Contract = CMC.contract AND TheRealPrefix.attribute = 'SomeOtherPrefix'
    LEFT JOIN taskTable ON taskTable.task LIKE '%' + Table1.valstring
 where secretCode = 'Mistery'

---

但是请记住，如果数据库中有许多行，请按'%'+表1进行搜索。valstring是一种不好的做法。

如果需要匹配，则不需要

左连接。所以把它们去掉。不清楚
secretCode
来自何处；这应该是明确的

属性
上的最后一个
连接
无效--不用于筛选。而且
secretCode
不是来自该表（您将得到一个错误，因为引用不合格）

所以，我想这就是你想要的：

SELECT tt.*
FROM TestDB.dbo.SomeCompany PC JOIN
     TestDB.dbo.CMCompany CMC 
     ON PC.companyuid = CMC.companyuid JOIN
     TestDB.dbo.ATRIBUTE a
     ON a.Contract = CMC.contract AND a.attribute = 'SomeThing' JOIN
     taskTable tt
     ON task like CONCAT('%', a.valstring)
WHERE secretCode = 'Mistery'