批量更新行集（所有行的所有列(除第一列)的列值=原列值-第一行列值）

原贴地址：http://topic.csdn.net/u/20100406/23/61cc0397-3eca-4350-bec1-88d00a790e95.html?64812



临时生成的行集中有多达上百字段，行数在十行以内，求所有行的所有列(除第一列)的列值=原列值-第一行对应列列值
如：



if Object_id('Test') <> 0
drop table test

create table Test
(
ID bigint identity(1,1),
Col0 real,
Col1 real,
Col2 real,
Col3 real,
Col4 real,
Col5 real,
Col6 real,
Col7 real,
Col8 real,
Col9 real,
Col10 real,
Col11 real,
Col12 real,
Col13 real,
Col14 real,
Col15 real,
Col16 real,
Col17 real,
Col18 real,
Col19 real
)

insert test values(0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19)
insert test values(20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39)
insert test values(100,101,102,103,104,105,106,107,108,109,110,111,112,113,114,115,116,117,118,119)
insert test values(200,201,202,203,204,205,206,207,208,209,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019
)

希望得到：

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 --第一行自己减自己
20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20 --第二行减第一行
100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100,100 --第三行减第一行
200,200,200,200,200,200,200,200,200,200,2000,2000,2000,2000,2000,2000,2000,2000,2000,2000 --第四行减第一行

IF OBJECT_ID('SP_TEST') IS NOT NULL
  DROP PROC SP_TEST
GO
CREATE PROC SP_TEST 
AS
SELECT * INTO # FROM TEST
DECLARE @S NVARCHAR(4000),@S1 NVARCHAR(4000)
SELECT @S=ISNULL(@S+',','DECLARE ')+'@'+NAME+' INT ' 
FROM SYSCOLUMNS 
WHERE OBJECT_ID('TEST')=ID AND NAME <>'ID'
SELECT @S1=ISNULL(@S1+',',';UPDATE # SET ')+'['+NAME+']='+QUOTENAME(NAME)+'-@'+NAME+',@'+NAME+'=ISNULL(@'+NAME+',['+NAME+'])' 
FROM SYSCOLUMNS 
WHERE OBJECT_ID('TEST')=ID AND NAME <>'ID'
EXEC(@S+@S1)
SELECT * FROM #
GO

--调用：
EXEC SP_TEST

--结果：
/*
ID    COL0    COL1    COL2    COL3    COL4    COL5    COL6    COL7    COL8    COL9    COL10    COL11    COL12    COL13    COL14    COL15    COL16    COL17    COL18    COL19
1    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0    0
2    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20    20
3    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100    100
4    200    200    200    200    200    200    200    200    200    200    2000    2000    2000    2000    2000    2000    2000    2000    2000    2000
*/