ifnotexists(select*fromErrorConfigwhereType='RetryWaitSeconds') begin insertintoErrorConfig(Type,Value1) values('RetryWaitSeconds','3') end 只能用: 1 2 3 insertintoErrorConfig(Type,Value1) select'RetryWaitSeconds',
mssql语法: 代码如下: if not exists (SELECT 1 FROM [t_Table] where [fName] = '张三') insert into [t_Table] ([fName]) values ('张三'); sqlite语法: 代码如下: insert into [t_Table] ([fName]) select '张三' where not exists (SELECT 1 FROM [t_Table] where [fName] = '张三'...
1insertintot(sPath)SELECT'abc'WHERENOTexists(SELECT*FROMtwheresPath='abc')
复制代码代码如下:if not exists (SELECT 1 FROM [t_Table] where [fName] = '张三')insert into [t_Table] ([fName]) values ('张三');复制代码代码如下:insert into [t_Table] ([fName]) select '张三'where not exists (SELECT 1 FROM [t_Table] where [fName] = '张三');
INSERT INTO books (name) SELECT 'Songxingzhu' WHERE NOT EXISTS (SELECT id FROM books WHERE id = 1) 三、Sqlserver中: SqlServer中需要另一种写法: IF NOT EXISTS (SELECT id FROMbooksWHERE id = 1)INSERT INTO books (name) SELECT 'Songxingzhu'...
SQLite实现ifnotexist类似功能的操作 需要实现：if not exists(select * from ErrorConfig where Type='RetryWaitSeconds')begin insert into ErrorConfig(Type,Value1)values('RetryWaitSeconds','3')end 只能⽤：insert into ErrorConfig(Type,Value1)select 'RetryWaitSeconds','3'where not exists(select * from...
CREATE TABLE IF NOT EXISTS STUDENT(Sno integer primary key, Sname text not null, Ssex text,Sage integer check(Sage>14),Sdept text default 'CS'); 该表的属性就是按照上一节表属性 执行结果: 查看表: 看到STUDENT,说明该表创建好了。【注意】 ...
使用insert into插入重复数据时,数据库会报错,但是使用insert or ignore into数据库就不会报错了。 insert or replace into table_name( id,type) values (1,0); insert or ignore into table_name (id,type) values (2,0); IF NOT EXISTS(SELECT * FROM table_name WHERE ….) THEN INSERT INTO ......
问SQLite 'IF NOT EXISTS‘语法错误ENtableA |column1 | column1 |column3 | --- tableb |column...
SQL INSERT INTO 语法 INSERT INTO 语句可以有两种编写形式。 第一种形式无需指定要插入数据的列名...