SQL: If Exists Update Else Insert 發行項 2008/02/17 This is a pretty common situation that comes up when performing database operations. A stored procedure is called and the data needs to be updated if it already exists and inserted if it does not. If we refer to the Books Online ...
VALUES ('xxx', 1, CURRENT_TIMESTAMP) ON DUPLICATE KEY UPDATE attempts_count = attempts_count + 1, attempt_datetime = CURRENT_TIMESTAMP 'ip_addess' 列是唯一的,MSSQL 和 MySQL 的表结构相同。 是否有可以在两种数据库类型中执行 IF INSERT ELSE UPDATE 的语法? 是的,我做(PDO)参数绑定,xxx只是为...
SQL Server存储过程是一种在SQL Server数据库中定义和执行的可重用代码块。存储过程可以包含一系列的SQL语句、控制结构、变量和参数,用于实现特定的业务逻辑和数据操作。 在给定的问答内容中,涉及到了使用存储过程进行UPDATE和INSERT操作的情况。具体而言,当需要更新数据时,可以使用存储过程中的U...
SELECT IF (EXISTS( SELECT * FROM Terminal WHERE IP_address=10.40.186.7)) UPDATE terminals SET IP_address=10.40.186.7 WHERE ID=1 and Name='anshu' ELSE INSERT INTO Terminal (ID, type_ID, Name,IP_address,tags,create_access_ID,Status_ID) ...
sqlserver 判断是否存在,如果存在就update,不存在就insert if not exists(SELECT 1 from pr_equipmentFacility eq inner join pr_equipmentFacilityEx ex on eq.equipmentFacilityID = ex.equipmentFacilityID where eq.equipmentFacilityCode='对应编码') INSERT into pr_equipmentFacilityEx (equipmentFacilityID,brand,...
IF EXISTS(SELECT 1 FROM sys_emp a,inserted b join hr_emp_title c on b.empid = c.empid)BEGIN update c set c.title_code = b.title_code from inserted b join hr_emp_title c on b.empid = c.empid END 不存在就插入 ELSE BEGIN insert into hr_emp_title(empid,title_code) ...
2. 在UPDATE字句中可以使用VALUES(col_name)函数来引用INSERT字句中的VALUES值； 比如： INSERT INTO ...
if exists(select 1 from T where T.a='1001' ) update T set T.b=2 Where T.a='1001' else insert into T(a,b) values('1001',2); 以上语句表明当T表中如果存在a='1001' 的记录的话,就把b的值设为2,否则就Insert一条a='100',b=2的记录到T中。
IF EXISTS ( SELECT * FROM inserted I INNER JOIN CommodityInfo C ON I.CommodityId=C.CommodityId WHERE I.Amount>C.Amount ) BEGIN ROLLBACK --后触发器 PRINT '商品的销售量大于商品的库存量' END ELSE BEGIN UPDATE CommodityInfo SET Amount=Amount-(SELECT Amount FROM inserted) ...
一个触发器内三种INSERT,UPDATE,DELETE状态 CREATE TRIGGER tr_T_A ON T_A for INSERT,UPDATE,DELETE 如IF exists (select * from inserted) and not exists (select * from deleted) 则为 INSERT 如IF exists(select * from inserted ) and exists (select * from deleted) 则为 UPDATE ...