sqlserver为 select @variable=expr,... from table where ... 错误处理: oracle通过select ... into ... from ... 赋值会产生错误!必须有错误处理,过程才能成功执行,否则过程抛出错误给应用程序;变量的值不受该错误操作的影响! 无值——变量保持select ... into ... from ...之前的状态 多值——变量...
其返回的表是由一个位于 RETURN 子句中的 SELECT 命令从数据库中筛选出来。内联表值型函数功能相当于一个参数化的视图。 多语句表值函数多语句表值函数可以看作标量函数和内联表值函数的结合体。它的返回值是一个表,但它和标量型函数一样有一个用 BEGIN-END 语句括起来的函数体,返回值的表中的数据是由函数...
select @aa=@aa+1; --状态改变 end 1. 2. 3. 4. 5. 6. 7. 8. 循环退出 BREAK; CONTINUE; 1. 2. 自定义错误处理 BEGIN TRY -- SQL END TRY BEGIN CATCH --SQL END CATCH 1. 2. 3. 4. 5. 6. 7. 可以在CATCH中使用以下语句抛出错误: THROW {error_number | @local_variable}, { mes...
保留字SELECT是DQL(也是所有SQL)用得最多的动词,其他DQL常用的保留字有WHERE,ORDER BY,GROUP BY和HAVING。这些DQL保留字常与其他类型的SQL语句一起使用。 数据操作语言(DML) 其语句包括动词INSERT,UPDATE和DELETE。它们分别用于添加,修改和删除表中的行。也称为动作查询语言。 事务处理语言(TPL) 它的语句能确保被D...
GOUSE[SQLTestDB]GOINSERTINTOSQLTest (ID, c1)VALUES(1,'test1')INSERTINTOSQLTest (ID, c1)VALUES(2,'test2')INSERTINTOSQLTest (ID, c1)VALUES(3,'test3')INSERTINTOSQLTest (ID, c1)VALUES(4,'test4')INSERTINTOSQLTest (ID, c1)VALUES(5,'test5')GOSELECT*FROMSQLTestGO ...
**ASCII stupid question, get a stupid ANSI !!!** stax68 SSChampion Points: 11711 More actions June 22, 2006 at 8:41 am #645279 Actually, a correction. The IN() function will accept a list of variable names separated by commas. In fact that's why you got the error you did. SQL...
SelectSetVariable.Expression Property Reference Feedback Definition Namespace: Microsoft.SqlServer.TransactSql.ScriptDom Assembly: Microsoft.SqlServer.TransactSql.ScriptDom.dll Package: Microsoft.SqlServer.TransactSql.ScriptDom v161.8901.0 Expression that is going to be used to set the variable....
@ return_variable can be specified only for Transact-SQL functions and not for CLR functions. select_stmt The single SELECT statement that defines the return value of an inline table-valued function (TVF). ORDER (<order_clause>) Specifies the order in which results are being returned from ...
35、在IN后面值的列表中,将出现最频繁的值放在最前面,出现得最少的放在最后面,减少判断的次数。 36、当用Select INTO时,它会锁住系统表(sysobjects,sysindexes等等),阻塞其他的连接的存取。创建临时表时用显示申明语句,而不是 select INTO. drop table t_lxh begin tran select * into t_lxh from chineseresume...
Select values not correctly increasing/decreasing total number in js Drupal 7: Saved class of <ol>-Element gets stripped away on display How to make flutter app responsive, for all kind of screens? how to get the dimensions of custom image on storyboard manually ...