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how to reference this ?

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allan8964
Posting Yak Master

249 Posts

Posted - 2012-02-13 : 11:18:41

Hi there,

Table like this:

ID | Code | Abbrev |
1 | 231 | BBV |
2 | 232 | CCD |
3 | 233 | BPG |...

I already use code in where clause as:
where code between 231 and 233
here code column is varchar data type. What if I need to use Abbrev instead? I mean how can i get same effect as above clause with column of Abbrev? Thanks in advance.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-13 : 11:24:27

where Abbrev in ('BBV','CCD','BPG')

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

allan8964
Posting Yak Master

249 Posts

Posted - 2012-02-13 : 12:24:17

Thanks visakh16.
If the situation is:

ID|Code |
1 | 231 | ...
2 | 232 |
3 | 233 |
4 | BBV | ...
5 | CCD | ...

and actually BBV=231, CCD=232, etc. can I use just number code to represent the abbrev letter by a new table with these two cols there referenced each other? Maybe I can use this:
where code between 231 and 233 or code in ('BBV','CCD','BPG')
But I want just use numbered Code to represent letter Code.
Thanks.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-13 : 12:26:38

yep...that where clause should work fine.

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

allan8964
Posting Yak Master

249 Posts

Posted - 2012-02-13 : 12:29:23

Sorry I editted it even after you replied.
What if I only want to use numbered Code to represent letter Code.
Thanks.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-13 : 12:39:40

quote:
Originally posted by allan8964

Sorry I editted it even after you replied.
What if I only want to use numbered Code to represent letter Code.
Thanks.

then you need to have a separate mapping table where you map all codes (number as well as letter) to their number equivalents and then use it for seraching
so it will have column


Code              MappedCode
-------------------------------
BBV                 231
CCD                 232
BPG                 233
231                 231
232                 232
233                 233
..

then use query like


SELECT t.
FROM YourTable t
JOIN MappingTable m
ON m.Code=t.Code
WHERE m.MappedCode BETWEEN 231 and 233

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

X002548
Not Just a Number

15586 Posts

Posted - 2012-02-13 : 12:43:00

Does that mapping table exist already? How do you KNOW how to make that mapping if it doesn't?

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

Want to help yourself?

http://msdn.microsoft.com/en-us/library/ms130214.aspx

http://weblogs.sqlteam.com/brettk/

http://brettkaiser.blogspot.com/

allan8964
Posting Yak Master

249 Posts

Posted - 2012-02-13 : 17:46:19

Thanks gents. The table is not there, I thought I need a mapping table but not sure how to manipulate the codes.
Thanks visakh16 again.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-13 : 18:11:36

welcome

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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