出现了insert阻塞update的情况，但同样的情况下，Oracle的insert则不会阻塞update。
to be updated if it already exists and inserted if it does not. If we refer to the Books Online documentation, it gives examples that are similar to: IF EXISTS (SELECT * FROM Table1 WHERE Column1='SomeValue') UPDATE Table1 SET (...) WHERE Column1='SomeValue' ELSE INSERT INTO Table...
若是订单生成的消息,那么推送来的id在table里面是没有的,就应该执行insert操作 若不是订单生成的消息,则执行更新 如果记录存在就更新,不存在就插入。sql如下: IFEXISTS(SELECT1FROM[Order]WHERETmallOrderID='20180505000193')UPDATE[Order]SET[CustomerRemark]='更新更新'WHERETmallOrderID='20180505000193';ELSEINSER...
to be updated if it already exists and inserted if it does not. If we refer to the Books Online documentation, it gives examples that are similar to: IF EXISTS (SELECT * FROM Table1 WHERE Column1='SomeValue') UPDATE Table1 SET (...) WHERE Column1='SomeValue' ELSE INSERT INTO Table...
INSERTINTOtable(SELECTid,'hisname'asnameFROMtableWHEREid>=3)ONDUPLICATE KEYUPDATEname=VALUES(name); 这种方法还可以用来批量执行UPDATE操作(因为单条UPDATE语句只能执行一种update操作) 方法二: 创建存储过程 CREATEPROCEDUREname() ifexists(select1from表whereID=@ID)beginUPDATE表SETXX=XXWHEREID=@IDendelsebeg...
CREATE PROCEDURE Usp_yoursp @Key VARCHAR(50), @Name VARCHAR(50) AS BEGIN -- SET NOCOUNT ON added to prevent extra result sets from SET NOCOUNT ON; IF EXISTS (SELECT 1 FROM yourtable WHERE KEY = @Key) UPDATE aTable SET Name = @Name ELSE INSERT INTO aTable ([Key], [Name]) VALUES...
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只是为了缩短代码片段。
先判断是否存在，存在就更新 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_...
IFEXISTS(SELECTCOUNT(*)FROMusersWHEREusername=@username)BEGIN-- 数据存在的情况下执行的操作PRINT'数据已存在';-- 可以在这里添加相关操作的代码UPDATEusersSET...WHEREusername=@username;ENDELSEBEGIN-- 数据不存在的情况下执行的操作PRINT'数据不存在';-- 可以在这里添加相关操作的代码INSERTINTOusers(username,...