How to translate string with data have integer + character and null data

[amija0311]

Hi,

I am new using DB2 9.1 database by windows base.
I want to query the data that contain string then translate the string into integer using DB2.
The problems is If the data is null, i got the problem to translate.
How to translate string also allow null data to integer. If null data it will read as space.

My Data :-

GEOSEG_ID     SEQNO      
----------  ---------
329802           2
329803           3A
329805           1A
329806          10
329808          11A
329810           9
329811           4
329812           6
329813           5
329814           7
329815           8A
329843          13A
329844          20
329845          21
329846          19
329848          14
329849          16
329850          15
329851          22
329852          18
329854          24
329855          23
329868         NULL
329869        NULL
329870         NULL
329871         NULL
329872         NULL
329873         NULL

This is My Query :-
-----------------

Select geoseg.geoseg_id,CAST(LTRIM(RTRIM(TRANSLATE(Elot_detail1.sequence, ' ', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'))) AS INTEGER) AS seqNo
FROM  GEOSEG,ELOT_DETAIL1 
WHERE    ELOT_DETAIL1.GEOSEG_ID  = GEOSEG.GEOSEG_ID
ELOT_DETAIL1.POSTCODE  = '41200'
AND    ELOT_DETAIL1.BIT  = '41'  
GROUP BY  GEOSEG.GEOSEG_ID,Elot_detail1.sequence  

Sql error will appear like this :-
---------------------------------

SQL0420N Invalid character found in a character string argument of the
function "INTEGER". SQLSTATE=22018

SQL0420N Invalid character found in a character string argument of the function "INTEGER ".

Explanation:

The function "<function-name>" has a character string argument
that contains a character that is not valid in a numeric SQL
constant. The function may have been called as a result of using
the CAST specification with "<function-name>" as the target data
type. The function or data type used in the SQL statement may be
a synonym for "<function-name>".

If a decimal character is specified in the DECIMAL function then
that is the character that must be used in place of the default
decimal character.

User Response:

Ensure that the character strings that are being converted to
numeric types contain only characters that are valid in numeric
SQL constants, using the decimal character, if specified.

sqlcode : -420

sqlstate : 22018

[sakumar9]

I am not able to understand why do you want this conversion from string to integer?

You cannot cast any string into integer......... they are not compatible....... i mean it doesn't makes any sense to me atleast.......

By the way, the error which you are getting is because of CAST function that you are using. CAST is trying to convert a string into an INTEGER which is not compatible(string and integer).

If you can explain what you really want to achieve, that would be great !

Regards
-- Sanjay

[amija0311]

Sorry because not explain well.

Actually i want to translate the sequence it will change string that have character to space "".

Like 1A it will read 1 and space.

example :-
--------------
CAST(LTRIM(RTRIM(TRANSLATE('1A', ' ', 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'))) AS INTEGER)

This query will done perfectly.

But if the data NULL, it will got error. How to make this query also can read NULL data and change it to space.

[docdiesel]

Hi,

try a

CASE WHEN NOT (SEQNO IS NULL)
THEN
  insert your cast statement
ELSE
 
END;

Or maybe you'd like to leave it NULL instead of turning it to zero (0) in the ELSE part. Does this work for you?

Regards,

Bernd