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updating datas

Author

Topic

rudba
Constraint Violating Yak Guru

415 Posts

Posted - 2009-05-12 : 10:04:27

Is there anyway to update Field3 (with adding Field1,Field1 if there are same value in Field2) with out using cursor.
I used the cursor but i have data like more than 5 Millions so its taking time .
the following records output looks like this:
ID Field1 Field2 Field3
1 Abc A100 Abc,Mnop
2 Xyz B200 Xyz,AAAA
3 Mnop A100 Abc,Mnop
4 TT C300
5 AAAA B200 Xyz,AAAA

declare @tbl1 table
(ID INT,
Field1 varchar(20),
Field2 varchar(10),
Field3 varchar(max)
)

INSERT INTO @tbl1
SELECT 1, 'Abc','A100',null

INSERT INTO @tbl1
SELECT 2,'Xyz', 'B200',null

INSERT INTO @tbl1
SELECT 3,'Mnop', 'A100',null

INSERT INTO @tbl1
SELECT 4, 'TT','C300',null

INSERT INTO @tbl1
SELECT 5,'AAAA', 'B200',null

ID Field1 Field2 Field3
1 Abc A100 Abc,Mnop
2 Xyz B200 Xyz,AAAA
3 Mnop A100 Abc,Mnop
4 TT C300
5 AAAA B200 Xyz,AAAA

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-05-12 : 10:07:50

are you using sql 2005?

rudba
Constraint Violating Yak Guru

415 Posts

Posted - 2009-05-12 : 10:21:12

yes sql 2005 with sp2

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2009-05-12 : 10:58:55

http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=81254

Madhivanan

Failing to plan is Planning to fail

rudba
Constraint Violating Yak Guru

415 Posts

Posted - 2009-05-12 : 11:24:26

I tried to emplement on my taks but could not get the right result.
Anybody have idea?

rudba
Constraint Violating Yak Guru

415 Posts

Posted - 2009-05-12 : 17:29:50

Guys, any one got the best solution?
I tried this way. But still taking time, is this good way?

SELECT t1.Id, t1.Field2,STUFF((SELECT ',' + t2.Field1 FROM @tbl1 AS t2 WHERE t2.Field2 = t1.Field2 FOR XML PATH('')), 1, 1, '') AS NewField
INTO #MyTemp FROM @tbl1 AS t1

select * from #MyTemp

UPDATE @tbl1
SET Field3=#MyTemp.NewField
FROM @tbl1, #MyTemp
WHERE @tbl1.ID=#MyTemp.ID

select * from @tbl1
drop table #MyTemp

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2009-05-13 : 10:24:38

looks fine. how long does query takes to execute currently?

rudba
Constraint Violating Yak Guru

415 Posts

Posted - 2009-05-13 : 10:27:38