用户登录存储过程-数据库

CREATE PROCEDURE Prc_Ad_Login
@AdName varchar(32),
@AdPwd nchar(32),
@Count int output,
@Err varchar(64) output
 AS

if exists(select intsuid from sysuser where varsuname=@AdName)
begin
 declare @suid int
 declare @dteErrs datetime
 declare @npwd nchar(32)
 declare @Lock bit
 declare @intErr int
 declare @Errpart int
 declare @ErrCount int
 select @suid=intsuid, @dteErrs=dteErr,@intErr=intErrCount,@npwd=narsupwd,@lock=bitLock from sysuser where varsuname=@Adname
 select @ErrCount=intsuerrcount,@Errpart=intsuerrminute from sysbasic
 if(@npwd=@Adpwd)
 begin
  if(@Lock=1)
  begin
   select @Count=2
   select @Err='你的帐户已被锁定,请联系站长!'
  end
  else
  begin
   
   select @Count=0
  end
 end
 else
 begin
  if(@Lock=0)
  begin
   if(datediff(n,@dteErrs,getdate())<@Errpart)
   begin
    if(@intErr<@ErrCount)
    begin
     update sysuser set intErrCount=intErrCount+1,dteErr=getdate() where intsuid=@suid
     if(@intErr=(@ErrCount-1))
     begin
      select @Count=4
      select @Err='登录错误过多,你的帐号被系统暂时锁定!'
     end
     else
     begin
      select @Count=1
      select @Err='用户名或密码错误!'
     end
    end
    else
    begin
     update sysuser set dteErr=getdate() where intsuid=@suid
     select @Count=3
     select @Err='你的帐号在一定时间内不允许登录!'
    end
   end
   else
   begin
    update sysuser set dteErr=getdate(),intErrCount=1 where intsuid=@suid
    select @Count=1
    select @Err='用户名或密码错误!'
   end
  end  
 end
end
else
begin
 select @Count=1
 select @Err='用户名或密码错误!'
end
GO