如何在SQL Server中使用INNER JOIN删除？

我想INNER JOIN在SQL Server 2008中删除使用。

但是我得到这个错误：

消息156，级别15，状态1，第15行
关键字“ INNER”附近的语法错误。

我的代码：

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

您需要指定要删除的表，这是带有别名的版本：

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

只需添加的表名DELETE，并FROM从那里你要删除的记录，因为我们必须指定表中删除。还要删除ORDER BY子句，因为删除记录时不需要排序。

因此，您的最终查询应如下所示：

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

可能对您有帮助-

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

或者尝试一下-

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

尝试这个：

DELETE FROM WorkRecord2 
       FROM Employee 
Where EmployeeRun=EmployeeNo
      And Company = '1' 
      AND Date = '2013-05-06'

它应该是：

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

这个版本应该工作

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

在SQL Server Management Studio中，我可以轻松创建SELECT查询。

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，并显示所有联系人。

现在将更SELECT改为DELETE：

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

您在 SELECT语句中将被删除。

您甚至可以使用相同的过程创建更困难的内部联接，例如：

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

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

试试这个查询：

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';

使用的另一种方式CTE。

;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 

注意：如果需要，我们不能JOIN在内部使用。CTEdelete

这是一次简单的查询，可以一次从两个表中删除记录。

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

试试这个，可能会有所帮助

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

这是我的SQL Server版本

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)

您没有为Company和指定表格Date，则可能要修复它。

标准SQL使用MERGE：

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

@Devart的答案虽然不是完整的，但也是标准SQL，应该看起来像这样：

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

上面要注意的重要一点是，显然删除是针对单个表的，如第二个示例中所要求的那样，它需要标量子查询。

对我来说，各种专有语法答案更难阅读和理解。我猜想，@ frans eilering的回答中最好地描述了这种心态，即编写代码的人不一定关心要阅读和维护代码的人。

这是我目前用于删除甚至更新的内容：

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