我想在SQL Server 2008中使用INNER JOIN删除。
但我得到了这个错误:
消息156,级别15,状态1,第15行关键字“INNER”附近的语法不正确。
我的代码:
DELETE
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND Date = '2013-05-06'
我想在SQL Server 2008中使用INNER JOIN删除。
但我得到了这个错误:
消息156,级别15,状态1,第15行关键字“INNER”附近的语法不正确。
我的代码:
DELETE
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND Date = '2013-05-06'
当前回答
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。还要删除ORDERBY子句,因为删除记录时没有要排序的内容。
因此,您的最终查询应该如下所示:
DELETE WorkRecord2
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND Date = '2013-05-06';
其他回答
这是一次从两个表中删除记录的简单查询。
DELETE table1.* ,
table2.*
FROM table1
INNER JOIN table2 ON table1.id= table2.id where table1.id ='given_id'
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)
您甚至可以执行子查询。喜欢下面的代码:
DELETE FROM users WHERE id IN(
SELECT user_id FROM Employee WHERE Company = '1' AND Date = '2013-05-06'
)
使用事务块、表变量和JOIN删除多个表数据。
BEGIN TRANSACTION;
declare @deletedIds table ( id int );
DELETE w
output deleted.EmployeeRun into @deletedIds
FROM WorkRecord2 w
INNER JOIN Employee e
ON e.EmployeeNo = w.EmployeeRun
AND w.Company = 1
AND w.date = '2013-05-06';
DELETE e
FROM Employee as e
INNER JOIN @deletedIds as d
ON d.id = e.EmployeeNo;
COMMIT TRANSACTION;
请从url检查https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=43330dda6f1b71b8ec4172a24d5b6921
使用临时表和JOIN删除多个表数据。删除后删除临时表。
BEGIN TRANSACTION;
-- create temporary table
create table #deletedRecords (employeeId int);
-- INSERT INTO #deletedRecords
SELECT e.EmployeeNo
FROM WorkRecord2 w
INNER JOIN Employee e
ON e.EmployeeNo = w.EmployeeRun
AND w.Company = 1
AND w.date = '2013-05-06';
-- delete from WorkRecord2
DELETE w
FROM WorkRecord2 w
INNER JOIN #deletedRecords d
ON w.EmployeeRun = d.employeeId;
-- delete from Employee using exists
DELETE
FROM Employee
WHERE EXISTS (SELECT 1
FROM #deletedRecords d
WHERE d.employeeId = EmployeeNo);
-- drop temporary table
DROP TABLE #deletedRecords;
COMMIT TRANSACTION;
请从url检查https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=d52c6c1ed91669d68fcc6bc91cb32d78
使用SELECT INTO创建临时表的另一种方法
BEGIN TRANSACTION;
SELECT e.EmployeeNo employeeId
INTO #deletedRecords
FROM WorkRecord2 w
INNER JOIN Employee e
ON e.EmployeeNo = w.EmployeeRun
AND w.Company = 1
AND w.date = '2013-05-06';
-- delete from WorkRecord2
DELETE w
FROM WorkRecord2 w
INNER JOIN #deletedRecords d
ON w.EmployeeRun = d.employeeId;
-- delete from Employee using exists
DELETE
FROM Employee
WHERE EXISTS (SELECT 1
FROM #deletedRecords d
WHERE d.employeeId = EmployeeNo);
-- drop temporary table
DROP TABLE #deletedRecords;
COMMIT TRANSACTION;
请从url检查https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=0f02f05616ce5b4dcc8fc67c6cf1e640
使用JOIN删除单个表数据
DELETE w
FROM WorkRecord2 w
INNER JOIN Employee e
ON e.EmployeeNo = w.EmployeeRun
AND w.Company = 1
AND w.date = '2013-05-06'
请从url检查https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=84a60d1368556a8837281df36579334a
使用CTE删除单表数据
WITH cte AS (
SELECT w.EmployeeRun
FROM WorkRecord2 w
WHERE EXISTS (SELECT 1
FROM Employee
WHERE EmployeeNo = w.EmployeeRun)
AND w.Company = 1
AND w.date = '2013-05-06'
)
DELETE
FROM cte
请从url检查https://dbfiddle.uk/?rdbms=sqlserver_2014&fiddle=6590007b3c8c2ffad5563bd86606c5b1
在子表中创建外键时使用ON CASCADE DELETE。如果删除父表数据,则会自动删除相应的子表数据。
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。还要删除ORDERBY子句,因为删除记录时没有要排序的内容。
因此,您的最终查询应该如下所示:
DELETE WorkRecord2
FROM WorkRecord2
INNER JOIN Employee
ON EmployeeRun=EmployeeNo
WHERE Company = '1'
AND Date = '2013-05-06';