Error trying to do insert on table


I am new to the SQL DBF platform.  I am trying to update a table with a rate.  I created a column

, 0 as rate

When trying to update rate using query below

      SET RATE = (SELECT IPRS_RATE FROM #DISTINCT_PRICE       P                    
                  WHERE TRIM(D.IPCD_ID) = TRIM(P.IPCD_ID)
                  AND P.IPRS_RATE IS NOT NULL)

I get this error

Error(21) ASA Error - 1002005: Tried to insert a null value into a non-null field RATE on row 98595

Can someone tell me how to rectify this issue by field definition or modification to update query?
moriniaAdvanced Analytics AnalystAsked:
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That error means your data has a null value in the result column and RATE column doesn't allow null.

Run the query by itself and see the values. Is there a null column?

SELECT IPRS_RATE FROM #DISTINCT_PRICE       P                    
                  WHERE TRIM(D.IPCD_ID) = TRIM(P.IPCD_ID)
                  AND P.IPRS_RATE IS NOT NULL
Julian HansenCommented:
Try this
                  WHERE TRIM(D.IPCD_ID) = TRIM(P.IPCD_ID)
                  AND P.IPRS_RATE IS NOT NULL AND P.IPRS_RATE <> '')

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moriniaAdvanced Analytics AnalystAuthor Commented:

I tried the update above and I get Invalid data type comparison in predicate


The file does not appear to have nulls when I do the select.  When I try to select iprs_rate  is null I get nothing.
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Julian HansenCommented:
What database are you using?
Sql  server
Sorry.  Mistook this for my own ticket. On my phone and can't delete my previous comment for some reason.
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