Need help with query for Pervasive

I have a query that I want to use for extracting data form a Pervasive database and then insert to a table.

This is the first part of the query which works in PostgreSQL

SELECT d.whse, d.part_no, EXTRACT(YEAR FROM d.invoice_date), EXTRACT(MONTH FROM d.invoice_date)
FROM sales_history_items AS d

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In Pervasive the invoice_date is a string like so 20141128

Can someone help me with this? Once I got this working I will post the whole query is I need more help.
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GerhardpetAsked:
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mirtheilCommented:
I'm guessing the problem with Pervasive is the EXTRACT part.  If that's not the case, post the version of Pervasive and the error you are seeing.  
If it is the EXTRACT, the Pervasive syntax for EXTRACT (in v10 and v11, at least) is:
EXTRACT (extract_field, extract_source)

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So your query would be :
SELECT d.whse, d.part_no, EXTRACT(YEAR, d.invoice_date), EXTRACT(MONTH, d.invoice_date)
FROM sales_history_items AS d

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0
Bill BachPresident and Btrieve GuruCommented:
If InvoiceDate is a String field, then you cannot use Extract.  Use Substring instead!
SELECT d.whse, d.part_no, LEFT(d.invoice_date,4), RIGHT(LEFT(d.invoice_date,6),4)
FROM sales_history_items AS d

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MID might also work, but I sometimes have issues with that.
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