问insert if not exist或update if exist SQL的正确语法EN有的时候会需要写一段insert的sql，如果主键...
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';ELSEINSERT[Order]( TmallOrderID, CustomerName, CustomerMessage )VALUES('20180505000193','小明摩纳哥','ddddddd'); 资...
在SQL语句中,向表中插入数据使用的是insert关键字、修改数据使用的是update关键字,删除数据使用的是delete关键字。 1、插入数据 插入数据可以插入含有表中所有字段的数据,也可以插入含有表中部分字段的数据,如果插入的是部分字段的数据,则在插入时则必须制定好插入的字段,如果插入的是全部字段的数据,则在插入时则必须...
INSERTINTOtable(SELECTid,'hisname'asnameFROMtableWHEREid>=3)ONDUPLICATEKEYUPDATEname=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=@IDendelsebeginI...
IF EXISTS (SELECT * FROM YourTable WHERE id = @id) BEGIN -- 已有值存在,执行更新操作 UPDATE YourTable SET value = @value WHERE id = @id END ELSE BEGIN -- 不存在值,执行插入操作 INSERT INTO YourTable (id, value) VALUES (@id, @value) ...
IF EXISTS (SELECT 1 FROM 表名 WHERE 条件)UPDATE 表名 SET 字段=值 WHERE 条件ELSEINSERT INTO 表名(字段) VALUES(值)真实使用举例:if exists(select 1 from [UserRules] where UserI
IF EXISTS ( SELECT 1 FROM Test WHERE Id = @Id ) UPDATE Test SET [Counter] = [Counter] + 1 WHERE Id = @Id; ELSE INSERT Test ( Id, Name, [Counter] ) VALUES ( @Id, @Name, 1 ); COMMIT 1. 2. 3. 4. 5. 6. 7.
if exists (select 1 from t where id = 1) insert into t(id, update_time) values(1, getdate()) else update t set update_time = getdate() where id = 1 1. 2. 3. 4. 5. 6. 7. 8. 9. mysql replace into 跟 insert 功能类似,不同点在于: ...
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...
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...