SQLServer存储过程实现单条件分页

Posted 2020-08-22 Mazey

SQLServer-代码：

 1 SQLServer Procedure Pagination_basic：
 2 ALTER PROCEDURE [qiancheng].[Pagination_basic] (
 3 @Table_name VARCHAR (255),
 4 --name of table
 5 @Rows_target VARCHAR (1000) = ‘*‘,
 6 --search rows 
 7 @Rows_condition VARCHAR (1000) = ‘‘,
 8 --the condition to find target (no where)
 9 @Rows_order VARCHAR (255) = ‘‘,
10 --the rows to rank
11 @Order_type INT = 0,
12 -- *Q*C* 0 normal 1 down
13 @PageSizes INT = 10,
14 --the size of each page
15 @PageIndex INT = 1,
16 --current page
17 @ShowPages INT,
18 --whether show the pages *Q*C* 1-yes 0-no
19 @ShowRecords INT,
20 --whether show the record *Q*C* 1-yes 0-no
21 @Records_total INT OUTPUT,
22 --returned total records
23 @Pages_total INT OUTPUT --returned total pages
24 ) AS
25 DECLARE @MainSQL_QC nvarchar (2000) --Main SQL sentence
26 DECLARE @Var_QC VARCHAR (100) --Temporary variate
27 DECLARE @Order_QC VARCHAR (400) --the sort to rank
28 SET @Records_total = 0
29 SET @Pages_total = 0
30 IF @ShowRecords = 1
31 OR @ShowPages = 1
32 BEGIN
33 
34 IF @Rows_condition != ‘‘
35 SET @MainSQL_QC = ‘select @Records_total = count(1) from [‘ + @Table_name + ‘] where ‘ +@Rows_condition
36 ELSE
37 
38 SET @MainSQL_QC = ‘select @Records_total = count(1) from [‘ + @Table_name + ‘]‘ EXEC sp_executesql @MainSQL_QC,
39  N‘@Records_total int out‘ ,@Records_total OUTPUT
40 END
41 IF @ShowPages = 1
42 BEGIN
43 
44 IF @Records_total <= @PageSizes
45 SET @Pages_total = 1
46 ELSE
47 
48 BEGIN
49 
50 SET @Pages_total = @Records_total /@PageSizes
51 IF (@Records_total %@PageSizes) > 0
52 SET @Pages_total = @Pages_total + 1
53 END
54 END
55 IF @Order_type = 1
56 BEGIN
57 
58 SET @Var_QC = ‘<(select min‘
59 SET @Order_QC = ‘ order by [‘ + @Rows_order + ‘] desc‘
60 END
61 ELSE
62 
63 BEGIN
64 
65 SET @Var_QC = ‘>(select max‘
66 SET @Order_QC = ‘ order by [‘ + @Rows_order + ‘] asc‘
67 END
68 IF @PageIndex = 1
69 BEGIN
70 
71 IF @Rows_condition != ‘‘
72 SET @MainSQL_QC = ‘select top ‘ + str(@PageSizes) + ‘ ‘ +@Rows_target + ‘ from [‘ + @Table_name + ‘] where ‘ + @Rows_condition + ‘ ‘ + @Order_QC
73 ELSE
74 
75 SET @MainSQL_QC = ‘select top ‘ + str(@PageSizes) + ‘ ‘ +@Rows_target + ‘ from [‘ + @Table_name + ‘] ‘ + @Order_QC
76 END
77 ELSE
78 
79 BEGIN
80 
81 IF @Rows_condition != ‘‘
82 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
83 ELSE
84 
85 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
86 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