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  • 存储过程

    1、登录验证:

    CREATE procedure proc_logon
    (@username nvarchar(50),  --账号
    @password nvarchar(50), --密码
    @reValue int output --返回结果
    )
    AS
    if exists(select id from P_login where username=@username)
    begin
    	if exists(select id from P_login where username=@username and password=@password)
    		set @reValue=0  	--通过验证
    	else
    		set @reValue=1         	--用户存在,密码不正确
    end
    else
    	set @reValue=2		--用户不存在
      --return  isnull(@reValue,3) 
    GO 
    

    执行:

    declare @reValue int
    exec proc_logon @username='test',@password='test',@reValue=@reValue output
    --如果存储过程里写的是:return @reValue的话,那执行完上面的语句,还要执行:print @reValue才能打印出结果 
    

    2、通用分页:

    CREATE proc proc_Pagination
        @tblName nvarchar(30),		-- 需要查询的表名
        @selectField nvarchar(100) = '*', 	-- 需要返回的列 
        @pageSize int = 10,			-- 每页显示的行数 
        @pageIndex int = 1, 		-- 页码 
        @primaryKey nvarchar(250), 		-- 主键
        @where nvarchar(250) = '',    -- 查询条件 (注意: 执行时不要加 where) 
        @orderBy nvarchar(250)='',     --排序字段
        @orderType nvarchar(250)='',  --排序方式,为空还是desc
        @totalCount int output    --总记录数
        as
    	set nocount on 
    	declare @PageLowerBound int
    	declare @PageUpperBound int
    	declare @createNewTablelStr nvarchar(1000)
    	declare @selectStr nvarchar(1000)
    	begin
    	create table #indextable(id int  primary key  identity(1,1),nid int)
    	if @where=''
    begin
    	set @where='1=1'
    end
    	set @PageLowerBound=(@pageIndex-1)*@pageSize
    	set @PageUpperBound=@PageLowerBound+@pageSize
    	set @createNewTablelStr='insert into #indextable(nid) select '+ @primaryKey +'  from [' + @tblName+ '] where '+@where + '  order by ' + @orderBy + ' ' + @orderType
    	exec (@createNewTablelStr)
    	select @totalCount=count(*) from #indextable
        --或: set @tatalCount=@@rowcount
     set @selectStr='select '+ @selectField +'  from  ['+@tblName +'] O,#indextable t where O.'+@primaryKey+ '=t.nid and t.id between '+  convert(varchar(12),@PageLowerBound+1)  +'  and '+  convert(varchar(12),@PageUpperBound)  +'  order by t.id'
    	end
    exec(@selectStr)
    delete #indextable
    	set nocount off
    GO
    

     

    执行:

    declare @totalCount int
    exec proc_pagination @tblName='P_RecordUserInfo',@selectField='o.id,userip',@pageSize=10,@pageIndex=2,@primaryKey='id',@where='id>10',@orderBy='id',@orderType='asc',@totalCount=@totalCount
    
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  • 原文地址:https://www.cnblogs.com/tianyajuanke/p/2182235.html
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