如何使用INNER JOIN与SQL Server删除？-Java 学习之路

959

我想在 SQL Server 2008 中使用 INNER JOIN 删除 .

但我得到这个错误：

消息156，级别15，状态1，行15关键字“INNER”附近的语法不正确 .

我的代码：

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

16 回答

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';

回复于 2024-05-03T10:36:33+08:00

试试这个，它可能会有所帮助

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

回复于 2024-05-03T10:36:33+08:00

109

试试这个：

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

回复于 2024-05-03T10:36:33+08:00

它应该是：

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

回复于 2024-05-03T10:36:33+08:00

这是我目前用于删除甚至更新的内容：

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

回复于 2024-05-03T10:36:33+08:00

4
您没有为 Company 和 Date 指定表，您可能想要修复它 .

使用 MERGE 的标准SQL：
```
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SQL虽然不完整，但看起来应该更像这样：
```
DELETE 
  FROM WorkRecord2
  WHERE EXISTS ( SELECT *
                   FROM Employee S
                  WHERE S.EmployeeNo = WorkRecord2.EmployeeRun
                        AND Company = '1'
                        AND Date = '2013-05-06' );
```
关于上述内容的重要一点是很明显删除是针对单个表，如第二个示例中强制要求标量子查询 .

对我来说，各种专有的语法答案更难阅读和理解 . 我想@frans eilering在答案中最好地描述了心态，即编写代码的人并不一定关心将阅读和维护代码的人 .
回复于 2024-05-03T10:36:33+08:00

这可能对你有所帮助 -

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

或试试这个 -

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

回复于 2024-05-03T10:36:33+08:00

这是一个简单的查询，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'

回复于 2024-05-03T10:36:33+08:00

您需要指定要删除的表，这是一个带别名的版本：

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

回复于 2024-05-03T10:36:33+08:00

2
只需在 DELETE 和 FROM 之间添加要删除记录的表的名称，因为我们必须指定要删除的表 . 同时删除 ORDER BY 子句，因为删除记录时无需订购 .

所以你的最终查询应该是这样的：
```
DELETE WorkRecord2 
      FROM WorkRecord2 
INNER JOIN Employee 
        ON EmployeeRun=EmployeeNo
     WHERE Company = '1' 
       AND Date = '2013-05-06';
```
回复于 2024-05-03T10:36:33+08:00

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

回复于 2024-05-03T10:36:33+08:00

1704

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)

回复于 2024-05-03T10:36:33+08:00

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SELECT更改为DELETE：

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

您将在SELECT语句中看到的所有记录都将被删除 .

您甚至可以使用相同的过程创建更难的内部联接，例如：

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

回复于 2024-05-03T10:36:33+08:00

使用 CTE 的另一种方式 .

;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

Note : 当你想要 delete 时，我们不能在 CTE 内使用 JOIN .

回复于 2024-05-03T10:36:33+08:00

8

如果你想在 more than one table 中使用 delete related data ，你可以使用如下的查询结构：

delete d.*,r.*,a.* from notifications_data d inner join notification_recipient_details r on d.notifications_data_id=r.notifications_data_id inner join notifications_audit a on d.notifications_data_id = a.notifications_data_id

以上查询完美无缺， deletes data 来自 three tables

回复于 2024-05-03T10:36:33+08:00

这个版本应该有效

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

回复于 2024-05-03T10:36:33+08:00

如何使用INNER JOIN与SQL Server删除？

16 回答

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