触发器(trigger)是个特殊的存储过程,它的执行不是由程序调用,也不是手工启动,而是由个事件来触发,比如当对一个表进行操作(insert,delete,update)时就会激活它执行。 SQL Server 包括三种常规类型的触发器:DML 触发器、DDL 触发器和登录触发器。 DML触发器:当数据库中表中的数据发生变化时,包括insert,update,delet...
可以采用Transact-SQL语句来创建存储过程Stored Procedured。在Microsoft SQL Server Management Studio中Databases->Database Name->Programmability->Stored Procedures右键选择Stored Procedure就生成了一个创建存储过程的模板,修改其中的内容再执行就创建了Stored Procedured。 下面我首先以创建对表中插入数据的存储过程来为例...
严重级别为 20 或更高且终止会话的 SQL Server 数据库引擎任务处理的错误。 如果发生严重性为 20 或更高的错误,并且数据库连接不会中断,TRY...CATCH请处理该错误。 需要关注的消息,如客户端中断请求或客户端连接中断。 当系统管理员使用KILL语句结束会话时。
--1、 不带参数的存储过程:创建一个存储过程,查看所有读者的姓名、可借本数、可借天数和已借书本数。 create procedure usp_selelctReader as select rdName,canLendQty,canLendDay,rdBorrowQty from Reader, ReaderType where Reader.rdType=ReaderType.rdType --测试执行 exec usp_selelctReader 1. 2. 3. ...
SQL Server 2016 傳回stored_procedure_name Transact-SQL 語法慣例 語法 syntaxsql ERROR_PROCEDURE( ) 傳回型別 nvarchar(128) 傳回值 在CATCH 區塊中呼叫時,ERROR_PROCEDURE會傳回發生錯誤之預存程序或觸發程序的名稱。 如果未在預存程序或觸發程序內發生錯誤,則ERROR_PROCEDURE會傳回 NULL。
For example, when a TRY block executes a stored procedure and an error occurs in the stored procedure, the error can be handled in the following ways: If the stored procedure doesn't contain its own TRY...CATCH construct, the error returns control to the CATCH block associated with the ...
stored procedure is executed in the CATCH block. By doing this, you do not have to repeat the error handling code in every CATCH block. In the follow code example, the SELECT statement in the TRY block will generate a divide-by-zero error. The error will be handled by the CATCH block...
Now let's modify the body of the code and use TRY/CATCH. (For this example, you'll need to run the code in a version of SQL Server 2005.) When you use TRY/CATCH, you separate your action code from error handling code. You put code for an action in a TRY block and place your...
Note The integration of .NET Framework CLR into SQL Server is discussed in this topic. CLR integration does not apply to Azure SQL Database.Jump to Simple Examples to skip the details of the syntax and get to a quick example of a basic stored procedure....
ExampleGet your own SQL Server CREATEPROCEDURESelectAllCustomers AS SELECT*FROMCustomers GO; Execute the stored procedure above as follows: Example EXECSelectAllCustomers; Stored Procedure With One Parameter The following SQL statement creates a stored procedure that selects Customers from a particular Ci...