SQLServer 存储过程实现单条件分页

Posted 2021-09-29 Mazey

SQLServer - 代码：

SQLServer Procedure Pagination_basic：
ALTER PROCEDURE [qiancheng].[Pagination_basic] (
@Table_name VARCHAR (255),
--name of table
@Rows_target VARCHAR (1000) = \'*\',
--search rows
@Rows_condition VARCHAR (1000) = \'\',
--the condition to find target (no where)
@Rows_order VARCHAR (255) = \'\',
--the rows to rank
@Order_type INT = 0,
-- *Q*C* 0 normal 1 down
@PageSizes INT = 10,
--the size of each page
@PageIndex INT = 1,
--current page
@ShowPages INT,
--whether show the pages *Q*C* 1-yes 0-no
@ShowRecords INT,
--whether show the record *Q*C* 1-yes 0-no
@Records_total INT OUTPUT,
--returned total records
@Pages_total INT OUTPUT --returned total pages
) AS
DECLARE @MainSQL_QC nvarchar (2000) --Main SQL sentence
DECLARE @Var_QC VARCHAR (100) --Temporary variate
DECLARE @Order_QC VARCHAR (400) --the sort to rank
SET @Records_total = 0
SET @Pages_total = 0
IF @ShowRecords = 1
OR @ShowPages = 1
BEGIN

IF @Rows_condition != \'\'
SET @MainSQL_QC = \'select @Records_total = count(1) from [\' + @Table_name + \'] where \' +@Rows_condition
ELSE

SET @MainSQL_QC = \'select @Records_total = count(1) from [\' + @Table_name + \']\' EXEC sp_executesql @MainSQL_QC,
 N\'@Records_total int out\' ,@Records_total OUTPUT
END
IF @ShowPages = 1
BEGIN

IF @Records_total <= @PageSizes
SET @Pages_total = 1
ELSE

BEGIN

SET @Pages_total = @Records_total /@PageSizes
IF (@Records_total %@PageSizes) > 0
SET @Pages_total = @Pages_total + 1
END
END
IF @Order_type = 1
BEGIN

SET @Var_QC = \'<(select min\'
SET @Order_QC = \' order by [\' + @Rows_order + \'] desc\'
END
ELSE

BEGIN

SET @Var_QC = \'>(select max\'
SET @Order_QC = \' order by [\' + @Rows_order + \'] asc\'
END
IF @PageIndex = 1
BEGIN

IF @Rows_condition != \'\'
SET @MainSQL_QC = \'select top \' + str(@PageSizes) + \' \' +@Rows_target + \' from [\' + @Table_name + \'] where \' + @Rows_condition + \' \' + @Order_QC
ELSE

SET @MainSQL_QC = \'select top \' + str(@PageSizes) + \' \' +@Rows_target + \' from [\' + @Table_name + \'] \' + @Order_QC
END
ELSE

BEGIN

IF @Rows_condition != \'\'
SET @MainSQL_QC = \'select top \' + str(@PageSizes) + \' \' +@Rows_target + \' from [\' + @Table_name + \'] where [\' + @Rows_order + \']\' + @Var_QC + \'([\' + @Rows_order + \']) from (select top \' + str((@PageIndex - 1) *@PageSizes) + \' [\' + @Rows_order + \'] from [\' + @Table_name + \'] where \' + @Rows_condition + \' \' + @Order_QC + \') as Tmep_QC) and \' + @Rows_condition + \' \' + @Order_QC
ELSE

SET @MainSQL_QC = \'select top \' + str(@PageSizes) + \' \' +@Rows_target + \' from [\' + @Table_name + \'] where [\' + @Rows_order + \']\' + @Var_QC + \'([\' + @Rows_order + \']) from (select top \' + str((@PageIndex - 1) *@PageSizes) + \' [\' + @Rows_order + \'] from [\' + @Table_name + \']\' + @Order_QC + \') as Tmep_QC)\' + @Order_QC
END EXEC (@MainSQL_QC)

调用：execute pagination_basic \'UserDetail\',\'*\',\'\',\'id\',\'1\',\'5\',\'1\',\'1\',\'1\',\'\',\'\'

主要是末尾的语句，拆分下来便是这样：

select top 每页数 列名 from [表名] where [排序字段名] < --1 倒序输出若列 小于之前页数的最小值

(select min ( [排序字段名] ) from --2 获得一个指定列名中的最小值并输出

(select top (当前页-1) * 每页数 [排序字段名] from [表名] where [条件] [排序类型]) --3 选择之前页数总数据倒序输出

as Tmep_QC) --4 建立一个名为 Tmep_QC 的临时表 --2 获得一个指定列名中的最小值并输出

and [条件] [排序类型] --1 倒序输出若列 小于之前页数的最小值

附录：

阅读原文：https://blog.mazey.net/1938.html