asked on

Help with SQL Update query

Hi Experts!

I have 2 tables with customers
Tab_Customers have the following record layout.

Customerno,
Firstname,
lastname,
adresse,
Zip,
City,
Phone,

Tab_Phone has the following recordlayout

Tab_Phone
Customerno
Firstname,
lastname,
adresse,
Zip,
City,
Phone

In Tab_Customers there is no phone numbers present
In Tab_Phone there are no customernumbers present, but it has phone numbers present.

I would like to add the customer number to the Tab_Phone table where ever there is a big similarity on the name.

I have tried the following:

update Tab_Phone
set Customerno = (
select c.Customerno from Tab_Customers c where exists(select * from Tab_Phone p where
similar (p.Firstname,c.firstname)<99 and
similar (p.Lastname,c.lastname)<99 and
similar (p.Adresse,c.adresse)<99 and
similar (p.zip,c.zip)<99 and
similar (p.City,c.City)<99)
)

Is someone able to help me?

regards
gfk76

reb73

Do you have a UDF called similar or are you trying to hint that you'd like to use a function that will act on similarity?

You could try the query below but it tries to match based on how the names sound when pronounced and may not be very accurate -

update p
set Customerno = c.customerno
from  Tab_Phone p
inner join Tab_Customers c on
	difference(p.Firstname, c.firstname)	> 3
and	difference(p.Lastname,c.lastname)	> 3
and	difference(p.Adresse,c.adresse)		> 3
and	difference(p.zip,c.zip)			> 3
and	difference(p.City,c.City)		> 3

Open in new window

gfk76

ASKER

Hi reb73!

Thank you for trying to help.
I should probably told you that it is a Sybase database.
Similar is a built in function in iAnywhere, that checks for similareties.

I tryed your query with similar instead of difference

update p
set Customerno = c.CustomerNo
from Tab_Phone p
inner join Tab_Customers c on
similar (p.Firstname,c.firstname)<99 and
similar (p.Lastname,c.lastname)<99 and
similar (p.Adresse,c.adresse)<99 and
similar (p.zip,c.zip)<99 and
similar (p.City,c.City)<99)

I get following error message
"Table p not found"

Any idea?

reb73

Try changing the first line from

update p

to

update Tab_Phone

gfk76

ASKER

This updates with the same customer number on all rows

Sharath S

Can you check this?

update Tab_Phone
   set Tab_Phone.Customerno = Tab_Customers.CustomerNo
  from Tab_Phone,Tab_Customers 
 where similar (Tab_Phone.Firstname,Tab_Customers.firstname)<99 and
       similar (Tab_Phone.Lastname,Tab_Customers.lastname)<99 and
       similar (Tab_Phone.Adresse,Tab_Customers.adresse)<99 and
       similar (Tab_Phone.zip,Tab_Customers.zip)<99 and
       similar (Tab_Phone.City,Tab_Customers.City)<99)

Open in new window

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reb73

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reb73

Correction: Please change line 8 as follows -

update Tab_Phone

gfk76

ASKER

Arggghhhh.....

Thank you so much......
I have been working on this query for 1 and a half day now.....
I cant belive I missed it.

You have saved my day, and tonight my sleep :-)

reb73

Glad to help! Cheers..