SQL Server 2005 T-SQL 学习笔记：Try Catch

用处：提供和C#一样的错误处理机制，不过没有finally块．try catch可以嵌套使用．如果错误被catch中处理过，后面的语句去继续运行．

语法：

begin try
...
end try
begin catch
...
end catch

简单示例：

begin try
    begin try
        exec sp_executesql N'select * from tables'
    end try
    begin catch
        print 'execute sql error'
    end catch

    insert into Region(RegionID, RegionDescription)
        values (1, 'xxx')


    --select 1/0
end try

begin catch
     select
        error_number() as errornumber,
        error_severity() as errorseverity,
        error_state() as errorstate,
        error_procedure() as errorprocedure,
        error_line() as errorline,
        error_message() as errormessage;

end catch

    注意error相关的函数要放在catch的第一行使用.

    在catch中可以使用raiserror函数，将错误通知调用的应用程序，如ADO.NET

begin try
    exec sp_executesql N'select * from tables'
end try
begin catch
    print 'execute sql error'
    raiserror 130001 'error message return to caller application'
end catch