通用的SQL数据分页存储过程

weixin_34302561

于 2019-01-08 05:17:21 发布

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文章标签：数据库

CREATE PROCEDURE spGetPageOfRecords
   @pageSize int = 20,                                       -- 分页大小
   @currentPage int ,                                   -- 第几页
   @columns varchar( 1000) = ' * ',                         -- 需要得到的字段
   @tableName varchar( 100),                                -- 需要查询的表
   @condition varchar( 1000) = '',                       -- 查询条件, 不用加where关键字
   @ascColumn varchar( 100) = '',                        -- 排序的字段名 (即 order by column asc/desc)
   @bitOrderType bit = 0,                                  -- 排序的类型 (0为升序,1为降序)
   @pkColumn varchar( 50) = ''                              -- 主键名称

AS
BEGIN
   DECLARE @strTemp varchar( 300)
   DECLARE @strSql varchar( 5000)                             -- 该存储过程最后执行的语句
   DECLARE @strOrderType varchar( 1000)                     -- 排序类型语句 (order by column asc或者order by column desc)

   BEGIN
     IF @bitOrderType = 1                                         -- 降序
       BEGIN
         SET @strOrderType = ' ORDER BY ' + @ascColumn + ' DESC '
         SET @strTemp = ' <(SELECT min '
       END
     ELSE                                                                       -- 升序
       BEGIN
         SET @strOrderType = ' ORDER BY ' + @ascColumn + ' ASC '
         SET @strTemp = ' >(SELECT max '
       END

     IF @currentPage = 1                                                 -- 第一页
       BEGIN
         IF @condition != ''
           SET @strSql = ' SELECT TOP ' + STR( @pageSize) + ' ' + @columns + ' FROM ' + @tableName +
             ' WHERE ' + @condition + @strOrderType
         ELSE
           SET @strSql = ' SELECT TOP ' + STR( @pageSize) + ' ' + @columns + ' FROM ' + @tableName + @strOrderType
       END

     ELSE                                                                       -- 其他页
       BEGIN
         IF @condition != ''
           SET @strSql = ' SELECT TOP ' + STR( @pageSize) + ' ' + @columns + ' FROM ' + @tableName +
           ' WHERE ' + @condition + ' AND ' + @pkColumn + @strTemp + ' ( ' + @pkColumn + ' ) ' + ' FROM (SELECT TOP ' + STR(( @currentPage - 1) * @pageSize) +
           ' ' + @pkColumn + ' FROM ' + @tableName + ' where ' + @condition + @strOrderType + ' ) AS TabTemp) ' + @strOrderType
         ELSE
           SET @strSql = ' SELECT TOP ' + STR( @pageSize) + ' ' + @columns + ' FROM ' + @tableName +
           ' WHERE ' + @pkColumn + @strTemp + ' ( ' + @pkColumn + ' ) ' + ' FROM (SELECT TOP ' + STR(( @currentPage - 1) * @pageSize) + ' ' + @pkColumn +
           ' FROM ' + @tableName + @strOrderType + ' ) AS TabTemp) ' + @strOrderType
       END

   END

   EXEC ( @strSql)
END

执行代码如下：

-- Test Employees Table on Northwind database
EXEC spGetPageOfRecords 5, 2, ' EmployeeID, LastName, FirstName, Title, City, Region, Country ', ' Employees ', '', ' EmployeeID ', 0, ' EmployeeID '

-- Test Customers Table on Northwind database
EXEC spGetPageOfRecords 10, 6, ' CustomerID, CompanyName, ContactName, ContactTitle, Address, City, Region, Country ', ' Customers ', '', ' CustomerID ', 0, ' CustomerID '