SQL Server如何使用内部联接删除？

How to Delete using INNER JOIN with SQL Server?

我想在SQL Server 2008中使用INNER JOIN删除。

但我得到这个错误：

Msg 156, Level 15, State 1, Line 15
Incorrect syntax near the keyword 'INNER'.

我的代码：

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DELETE FROM WorkRecord2
INNER JOIN Employee ON EmployeeRun=EmployeeNo
WHERE Company = '1' AND DATE = '2013-05-06'

相关讨论

您需要指定要从中删除的表，这里是一个带有别名的版本：

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DELETE w
FROM WorkRecord2 w
INNER JOIN Employee e
ON EmployeeRun=EmployeeNo
WHERE Company = '1' AND DATE = '2013-05-06'

相关讨论

只需在DELETE和FROM之间添加表名，因为我们必须指定要删除的表，所以要从中删除记录。同时删除ORDER BY子句，因为删除记录时没有要订购的内容。

所以您的最终查询应该如下所示：

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DELETE WorkRecord2
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND DATE = '2013-05-06';

相关讨论

试试这个：

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DELETE FROM WorkRecord2
FROM Employee
WHERE EmployeeRun=EmployeeNo
AND Company = '1'
AND DATE = '2013-05-06'

相关讨论

可能这对你有帮助-

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DELETE FROM dbo.WorkRecord2
WHERE EmployeeRun IN (
SELECT e.EmployeeNo
FROM dbo.Employee e
WHERE ...
)

或者试试这个——

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DELETE FROM dbo.WorkRecord2
WHERE EXISTS(
SELECT 1
FROM dbo.Employee e
WHERE EmployeeRun = e.EmployeeNo
AND ....
)

相关讨论

应该是：

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DELETE zpost
FROM zpost
INNER JOIN zcomment ON (zpost.zpostid = zcomment.zpostid)
WHERE zcomment.icomment ="first"

这个版本应该有效

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DELETE WorkRecord2
FROM WorkRecord2
INNER JOIN Employee ON EmployeeRun=EmployeeNo
WHERE Company = '1' AND DATE = '2013-05-06'

尝试此查询：

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DELETE WorkRecord2, Employee
FROM WorkRecord2
INNER JOIN Employee ON (tbl_name.EmployeeRun=tbl_name.EmployeeNo)
WHERE tbl_name.Company = '1'
AND tbl_name.Date = '2013-05-06';

相关讨论

在SQL Server Management Studio中，我可以轻松地创建一个选择查询。

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SELECT Contact.Naam_Contactpersoon, Bedrijf.BedrijfsNaam, Bedrijf.Adres, Bedrijf.Postcode
FROM Contact
INNER JOIN Bedrijf ON Bedrijf.IDBedrijf = Contact.IDbedrijf

我可以执行它，并显示我的所有联系人。

现在将选择更改为删除：

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DELETE Contact
FROM Contact
INNER JOIN Bedrijf ON Bedrijf.IDBedrijf = Contact.IDbedrijf

您在select语句中看到的所有记录都将被删除。

甚至可以使用相同的过程创建更困难的内部联接，例如：

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DELETE FROM Contact
INNER JOIN Bedrijf ON Bedrijf.IDBedrijf = Contact.IDbedrijf
INNER JOIN LoginBedrijf ON Bedrijf.IDLoginBedrijf = LoginBedrijf.IDLoginBedrijf

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DELETE a FROM WorkRecord2 a
INNER JOIN Employee b
ON a.EmployeeRun = b.EmployeeNo
WHERE a.Company = '1'
AND a.Date = '2013-05-06'

相关讨论

试试这个，可能会有帮助

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DELETE WorkRecord2
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND DATE = '2013-05-06';

相关讨论

另一种使用CTE的方法。

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;WITH cte
AS (SELECT *
FROM workrecord2 w
WHERE EXISTS (SELECT 1
FROM employee e
WHERE employeerun = employeeno
AND company = '1'
AND DATE = '2013-05-06'))
DELETE FROM cte

注：当您想使用DELETE时，我们不能在CTE内使用JOIN。

这是一次从两个表中删除记录的简单查询。

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DELETE table1.* ,
table2.*
FROM table1
INNER JOIN table2 ON table1.id= table2.id WHERE table1.id ='given_id'

相关讨论

您没有为Company和Date指定表，您可能需要修复它。

使用MERGE的标准SQL：

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MERGE WorkRecord2 T
USING Employee S
ON T.EmployeeRun = S.EmployeeNo
AND Company = '1'
AND DATE = '2013-05-06'
WHEN MATCHED THEN DELETE;

@devart的答案也是标准的SQL，虽然不完整，但应该更像这样：

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DELETE
FROM WorkRecord2
WHERE EXISTS ( SELECT *
FROM Employee S
WHERE S.EmployeeNo = WorkRecord2.EmployeeRun
AND Company = '1'
AND DATE = '2013-05-06' );

关于上述内容，需要注意的重要一点是，显然删除的目标是单个表，正如第二个示例中通过要求标量子查询而强制执行的那样。

对我来说，各种专有的语法答案很难阅读和理解。我想@frans eilering最好在答案中描述他们的心态，也就是说，编写代码的人并不一定关心阅读和维护代码的人。

以下是我当前用于删除甚至更新的内容：

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DELETE FROM w
FROM WorkRecord2 w,
Employee e
WHERE w.EmployeeRun = e.EmployeeNo
AND w.Company = '1'
AND w.Date = '2013-05-06'

这是我的SQL Server版本

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DECLARE @ProfileId TABLE(Id BIGINT)

DELETE FROM AspNetUsers
OUTPUT deleted.ProfileId INTO @ProfileId
WHERE Email = @email

DELETE FROM UserProfiles
WHERE Id = (SELECT Id FROM @ProfileId)