The SQL Server Stored Procedure returns both the paging result set and the total number. The stored procedure is paged.

The SQL Server Stored Procedure returns both the paging result set and the total number. The stored procedure is paged.

Preface

I haven't touched the database for a long time. I wrote a report stored procedure at home over the weekend. I don't know how to implement it better when I use the stored procedure to implement paging and calculate the total number of records. According to our normal business logic, stored procedure data is first divided by pages, followed by several query conditions. When the paging result set is returned, the total number of records must be returned to the client.

I will summarize such a business stored procedure as follows: 1. At the kernel layer, this is usually the query field or the field to be calculated. 2. query condition layer. If the kernel only queries some fields, the conditions can be spliced at the query condition layer. If the kernel layer is completely statistical business logic, the query conditions must be placed on the kernel layer, such as the SUM and GROUPBY services we commonly use. 3. Add the paging parameter (that is, we currently use ROW_NUMBER to add the rn parameter ). In the stored procedure, we usually declare the variables of each part for merging during execution.

Stored Procedure

CREATE proc [dbo]. [usp_manyidu] (@ seatno nvarchar (30), @ pageIndex int, @ pageSize int, @ rsCount int out) asbegin declare @ SQL nvarchar (max) -- concatenate the kernel SQL declare @ where nvarchar (max) = 'where 1 = 1' -- Query condition concatenation string declare @ cols nvarchar (max) -- query the field and calculated field declare @ sort nvarchar (50) -- sort set @ SQL = 'from dbo. log where seatno is not null and seatno <> ''' group by seatno' set @ cols = 'seatno, SUM (case when manyidu = 0 then 1 else 0 end) as manyi, SUM (case when manyidu = 1 then 1 else 0 end) as yiban, SUM (case when manyidu = 2 then 1 else 0 end) as bumanyi, SUM (case when manyidu IS null or manyidu = ''' then 1 else 0 end) as weipingjia 'set @ sort = 'order by seatno' if (@ seatno <> '') set @ where + = 'and seatno =' + @ seatno declare @ strSQL nvarchar (max) set @ strSQL = n' select * from (select ROW_NUMBER () over ('+ @ sort +') as tmpid, * from (select '+ @ cols + @ SQL +') as tmpTable1 '+ @ where + ') as tmpTable2) as tmpTable3 '+ 'where tmpid between' + STR (@ pageIndex-1) * @ pageSize + 1) + 'and' + STR (@ pageIndex * @ pageSize) print @ strSQL exec (@ strSQL) set @ strSQL = 'select @ total = count (*) from (select '+ @ cols + @ SQL + ') as tmpTable '+ @ where print @ strSQL exec sp_executesql @ strSQL, n' @ total int out', @ total = @ rsCount out endGO

The above is all the content of this article. I hope it will be helpful for your learning and support for helping customers.