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Using Like

Posted on 2009-05-13
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Last Modified: 2012-05-06
I'm trying to use "Like" like below but this only looks for exact matches. How can I do this?

Note that F_Alert table has no keys related to the other table.
select * from f_alert where 
   criteria like (select Addressee from LAddress lc
                      inner join customeraddress mca on mca.addressid=lc.id  where mca.customerid = '123')

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Question by:Camillia
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9 Comments
 
LVL 10

Expert Comment

by:Espavo
ID: 24376717
Try this:
select * from f_alert where 
   criteria like '%(select Addressee from LAddress lc
                      inner join customeraddress mca on mca.addressid=lc.id  where mca.customerid = '123')%'

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0
 
LVL 75

Expert Comment

by:Aneesh Retnakaran
ID: 24376720

select *
from f_alert f
where exists
(select null
from LAddress lc
inner join customeraddress mca on mca.addressid=lc.id
where mca.customerid = '123' AND f.criteria like '%'+Addressee+'%')
0
 
LVL 22

Expert Comment

by:8080_Diver
ID: 24377358
Try the following two options.  Using LIKE is bad enough without compounding things with an EXISTS. ;-)

Option 1:
 
SELECT F.* 
FROM f_alert F
INNER JOIN LAddress A
ON F.criteria = A.Addressee
INNER JOIN  customeraddress C
ON C.addressid=A.id  
AND C.customerid LIKE '%' + '123' + '%';
 
Option 2:
SELECT F.* 
FROM f_alert F
INNER JOIN LAddress A
ON F.criteria = A.Addressee
INNER JOIN  customeraddress C
ON C.addressid=A.id  
WHERE C.customerid LIKE '%' + '123' + '%';

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LVL 7

Author Comment

by:Camillia
ID: 24377473
let me see. Thanks. Yeah, like is not good.
0
 
LVL 22

Expert Comment

by:8080_Diver
ID: 24377550
LIKE is Not A Good THing . . . unless it is the only way to get there from here. ;-)
However, when you use LIKE, you just have to be aware that you have just agreed to have potentially very poor performance and, if you are playing with enough data, time outs. ;-)
Where I work, there is an application that may wind up using up to 5 instances of LIKE '%whatever%' on tables with millions of rows . . . and they keep asking me to provide indexes to solve their performance issues. ;-)
0
 
LVL 7

Author Comment

by:Camillia
ID: 24377648
Fraud_alert table has a row with column =330.  LocAddress has a column=33092

It should bring back that "330" row but it doesnt:

select * 
from fraud_alert f 
where exists 
(select null 
from LocAddress lc 
inner join memcustomeraddress mca on mca.addressid=lc.id 
where mca.customerid = '123' AND 
(f.criteria like '%' + PostalCode + '%' OR f.criteria like '%'+Addressee+'%' OR f.criteria like '%'+ Address1 + '%' )
 
)

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LVL 22

Expert Comment

by:8080_Diver
ID: 24378271
You've got your LIKEs cross wired.  (And I still done't like the EXISTS approach but I don't have time to alter that part. ;-)
select * 
from fraud_alert f 
where exists 
(select null 
from LocAddress lc 
inner join memcustomeraddress mca on mca.addressid=lc.id 
where mca.customerid = '123' AND 
(PostalCode like '%' + f.criteria + '%' OR Addressee like '%'+f.criteria+'%' OR Address1 like '%'+ f.criteria + '%' )
 
)

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LVL 22

Accepted Solution

by:
8080_Diver earned 2000 total points
ID: 24378322
On second thought, it didn't take too long: ;-)
SELECT f.* 
FROM fraud_alert f 
INNER JOIN 
(
 SELECT PostalCode,
        Addressee,
        Address1 
FROM LocAddress lc 
INNER JOIN memcustomeraddress mca 
   ON mca.addressid=lc.id 
WHERE  mca.customerid = '123'
) Z
ON (Z.PostalCode like '%' + f.criteria + '%' ) OR 
   (Z.Addressee like '%'+f.criteria+'%' ) OR 
   (Address1 like '%'+ f.criteria + '%' );
 

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0
 
LVL 7

Author Comment

by:Camillia
ID: 24378484
8080: your last one worked. Let me try one more thing and will post back
0

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