看了这个需求同事表示很麻烦，列是动态的，多一天多一个订单类型就多一列，我看了下，这不是sql行转列的节奏么。这个还真没搞过。大家pp这个设计是否合理：
1、模拟数据
2、确定思路，网上看了下动态sql实现，自己想了想好像还需要祭出游标神器，一番调式成功了。没有性能问题啊，呵呵，交货了。跟同事说了下思路，他表示看不惯游标里面嵌套游标。好吧，你自己实现吧，偶是有经验的运用游标，不是乱用，爱用不用。呵呵...
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USE [SK_WMS_DB]GO/****** Object: StoredProcedure [dbo].[sp_warehouse_sum_byOrderDate] Script Date: 01/15/2014 17:16:50 ******/SET
ANSI_NULLS ONGOSET
QUOTED_IDENTIFIER ONGOALTER
PROC [dbo].[sp_warehouse_sum_byOrderDate]ASBEGIN declare
@sql varchar(max) declare
@v_order_flag varchar(10) declare
@v_dt Date declare
@v_report_columnName varchar(60) --订单类型临时表 SELECT
distinct
[OrderFlag] INTO
#OrderFlag_Info FROM
[SK_WMS_DB].[dbo].[Table_Report_Test] ORDER
BY
[OrderFlag] DESC --订单日期临时表 SELECT
distinct
OrderDT INTO
#OrderDT_Info FROM
[SK_WMS_DB].[dbo].[Table_Report_Test] ORDER
BY
OrderDT --表头临时表 SELECT
CAST(NULL
AS
DATE) ORDER_DT, CAST
(‘‘
AS
varchar(60)) AS
REP_COL_NAME, CAST
(‘‘
AS
varchar(10)) AS
OrderFlag INTO
#REPORT_COLUMN declare
cur_order_flag cursor
for
select
OrderFlag from
#OrderFlag_Info open
cur_order_flag fetch
next
from
cur_order_flag into
@v_order_flag --根据订单类型生成列名 while @@FETCH_STATUS = 0 begin declare
cur_OrderDT cursor
for
select
OrderDT from
#OrderDT_Info open
cur_OrderDT fetch
next
from
cur_OrderDT into
@v_dt --日期+订单类型 while @@FETCH_STATUS = 0 begin INSERT
INTO
#REPORT_COLUMN select
@v_dt, CAST(substring(CONVERT(char(10),@v_dt,102),6,5)+ @v_order_flag as
varchar(60)), @v_order_flag fetch
next
from
cur_OrderDT into
@v_dt end close
cur_OrderDT deallocate
cur_OrderDT INSERT
INTO
#REPORT_COLUMN select
‘1901-01-01‘,CAST(RTRIM(LTRIM(@v_order_flag))+‘小计‘
as
varchar(60)),@v_order_flag fetch
next
from
cur_order_flag into
@v_order_flag end close
cur_order_flag deallocate
cur_order_flag declare
@colText varchar(max) declare
cur_tbl cursor
for
SELECT
REP_COL_NAME FROM
#REPORT_COLUMN WHERE
ORDER_DT IS
NOT
NULL --返回结果临时表 SELECT
CAST
(‘‘
AS
VARCHAR(255)) AS
仓库名称, CAST
(‘‘
AS
VARCHAR(255)) AS
库内区域名称, CAST
(‘‘
AS
VARCHAR(255)) AS
物料号码, CAST
(‘‘
AS
VARCHAR(255)) AS
品名, CAST
(‘‘
AS
VARCHAR(255)) AS
包装 INTO
#Result_Report --循环增加列 open
cur_tbl fetch
next
from
cur_tbl into
@v_report_columnName while @@FETCH_STATUS = 0 begin SET
@colText = RTRIM(LTRIM(@v_report_columnName)) SET
@sql = ‘ALTER TABLE #Result_Report ADD [‘+@colText+‘] [numeric](18, 2) default 0‘ EXEC(@sql) fetch
next
from
cur_tbl into
@v_report_columnName end close
cur_tbl deallocate
cur_tbl --清空临时表记录 DELETE
FROM
#Result_Report --开始准备数据,每个仓库循环一次 declare
@WareHouse varchar(60) declare
@qty numeric(18,2) declare
cur_data_fill cursor
for
SELECT
distinct
[WareHouseName] FROM
[SK_WMS_DB].[dbo].[Table_Report_Test] --填充记录 open
cur_data_fill fetch
next
from
cur_data_fill into
@WareHouse while @@FETCH_STATUS = 0 begin insert
into
#Result_Report (仓库名称,库内区域名称,物料号码,品名,包装) select
@WareHouse,‘‘
库内区域名称,‘‘
物料号码,‘‘
品名,‘‘
包装 declare
cur_sum_qty cursor
for SELECT
REP_COL_NAME,ORDER_DT,OrderFlag FROM
#REPORT_COLUMN WHERE
ORDER_DT IS
NOT
NULL open
cur_sum_qty fetch
next
from
cur_sum_qty into
@v_report_columnName,@v_dt,@v_order_flag while @@FETCH_STATUS = 0 begin IF @v_dt <> ‘1901-01-01‘ SELECT
@qty = isnull(SUM(t.Qty),0) FROM
dbo.Table_Report_Test t WHERE
t.WareHouseName = @WareHouse AND
t.OrderDT = @v_dt AND
t.OrderFlag = @v_order_flag ELSE SELECT
@qty = isnull(SUM(t.Qty),0) FROM
dbo.Table_Report_Test t WHERE
t.WareHouseName = @WareHouse AND
t.OrderFlag = @v_order_flag SELECT
@sql = ‘UPDATE #Result_Report SET [‘+LTRIM(RTRIM(@v_report_columnName))+‘] = ‘+CAST(@qty AS
VARCHAR) + ‘ WHERE 仓库名称 = ‘‘‘+@WareHouse+‘‘‘‘ EXEC(@sql) fetch
next
from
cur_sum_qty into
@v_report_columnName,@v_dt,@v_order_flag end close
cur_sum_qty deallocate
cur_sum_qty fetch
next
from
cur_data_fill into
@WareHouse end close
cur_data_fill deallocate
cur_data_fill --返回结果集 SELECT
* FROM
#Result_ReportEND |
3、成果：
写在这里自己备忘,也给同行看看还有更好的方法不,可以随便喷...
原文：http://www.cnblogs.com/datacool/p/sql_row_2_col_datacool.html