sql server存储过程的条件判断和事务管理

       通过sql server存储过程周期性地根据条件字段值设置其他字段，包括条件判断和事务管理。实例语句如下。

      数据库表（vipPoint）定义语句如下：

CREATE   TABLE   [ dbo ] . [ vipPoint ]  (
     [ userCode ]   [ varchar ]  ( 50 ) COLLATE Chinese_PRC_CI_AS  NOT   NULL  ,
     [ point ]   [ int ]   NOT   NULL  ,
     [ currentStatus ]   [ int ]   NOT   NULL  ,
     [ baseStatus ]   [ int ]   NOT   NULL  
)  ON   [ PRIMARY ]
GO

      存储过程语句如下：

CREATE   procedure  vipProcess 
as
begin

     if  ( MONTH ( getdate ()) = 7 )
     begin
         begin   transaction
         update  vipPoint  set  currentStatus = 1   where  baseStatus = 1   and  point > 1000
         update  vipPoint  set  currentStatus = 0   where  baseStatus = 1   and  point < 1000
         update  vipPoint  set  currentStatus = 1   where  baseStatus = 0   and  point > 1500
         update  vipPoint  set  currentStatus = 0   where  baseStatus = 0   and  point < 1500
         /**/ /**update vipPoint set point=0**/
         update  vipPoint  set  point = 10000000000000000000000000000
         if  ( @@error <> 0 )
         begin
             print ( ' rollback transaction ' )
             rollback   transaction
             return   0 ;
         end ;
         commit   transaction
     end ;
end ;
GO

        也可以如下：

CREATE   procedure  vipProcess 
as
begin

     if  ( MONTH ( getdate ()) = 7 )
     begin
         begin   transaction
         update  vipPoint  set  currentStatus = case   when  point >= 1000   then   1   when  point < 1000   then   0   end   where  baseStatus = 1
         update  vipPoint  set  currentStatus = case   when  point >= 1500   then   1   when  point < 1500   then   0   end   where  baseStatus = 0
         /**/ /**update vipPoint set point=0**/
         update  vipPoint  set  point = 10000000000000000000000000000
         if  ( @@error <> 0 )
         begin
             print ( ' rollback transaction ' )
             rollback   transaction
             return   0 ;
         end ;
         commit   transaction
     end ;
end ;
GO