sql-针对纵向转横向的模型

                                                                       sql-针对纵向转横向的模型

/*
* 针对纵向转横向的模型
*/
GO
drop procedure Model_his_mid;
GO
create procedure Model_his_mid(
/* 
* @vColumns   分组的列 (最后一个字段后面一定不要加,)
* @vClause   查询表的条件(没有条件='')
* @vOrderby   查询结果排序的字段 ''为默认排序
* @vTop     取出的行数 ''为全部
*/
@vColumns nvarchar(1000),
@vClause nvarchar(4000),
@vOrderby nvarchar(100),
@vTop nvarchar(50)
)
as

declare @sql nvarchar(4000)
declare @xColumns nvarchar(4000)

declare @vTable nvarchar(50)
declare @vColumnName nvarchar(100)
declare @vSumColName nvarchar(100)
declare @vNum nvarchar(50)
declare @vAllNum nvarchar(50)
declare @vSumOrCount nvarchar(50)

set @xColumns = ''

/*
* 需要赋值的参数
*
* @vTable    真正查询的表名
* @vColumnName 纵向转横向的列名
* @vSumColName 取合计值的列名
* @vNum     数值的别名
* @vAllNum   每行合计的列名 (如果不要合计则='')
* @vSumOrCount sum或者count
* 
*/
set @vTable = 'his_mid_tab'
set @vColumnName = 'hsks'
set @vSumColName = 'qty'
set @vNum = 'num'
set @vAllNum = 'allnum'
set @vSumOrCount = 'sum'

select 
@xColumns = @xColumns
+ 'sum(case ' + @vColumnName + ' when '+ char(39) + [a].[column] + char(39)+ ' then ' + @vNum + ' else 0 end) as '''
+ [a].[column] + ''', '

/*
* 需要比例加入此语句
* + '(' + 'cast(round(sum(case ' + @vColumnName + ' when '+ char(39) + [a].[column] + char(39)+ ' then ' + @vNum + ' else 0 end)*100.00' + '/sum(' + @vNum + '),2) as decimal(10,2))) as ' + [a].[column] + '_i, '
*/

/**
* 要动态显示列的sql语句 住院 OUTP_OR_INP = '0' 门诊OUTP_OR_INP = '1'
*/
from (select distinct DEPT_NAME as [column] from his_mzkm_tab where OUTP_OR_INP = '0') as a

set @xColumns = substring(@xColumns, 0, len(@xColumns))

set @sql = 'select '

if(@vTop <> '')
set @sql = @sql + 'top ' + @vTop + ' '

set @sql = @sql + @vColumns + ', ' + @xColumns

if(@vAllNum <> '')
set @sql = @sql + ', sum(' + @vNum + ') as ' + @vAllNum

set @sql = @sql + ' from ('
+ 'select ' + @vColumns + ', ' + @vColumnName + ', ' + @vSumOrCount + '(' + @vSumColName + ') as ' + @vNum + ' from ' + @vTable
if(@vClause <> '')
set @sql = @sql + ' where ' + @vClause

set @sql = @sql + ' group by ' + @vColumns + ', ' + @vColumnName

set @sql = @sql + ') as casual_table group by ' + @vColumns + ' '

if(@vOrderby <> '')
set @sql = @sql + 'order by ' + @vOrderby
print @sql
exec sp_executesql @sql with recompile

/*
* sql语句 引号之内的为sql中的几个参数分别为（分组的列，条件，排序，取出行数）
* exec Model_his_mid 'kjkm','date = ''8''','kjkm desc',''
*/

/*
* sql语句
* exec Model_his_mid 'kjkm','','kjkm desc','15'
*/