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[SOLVED] How to check if a field that can be created but wasn't exists?


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Good morning, I am trying to figure out if it is possible to check if these invoice lines exist or not. 

Here are the table and column name: INVOICELINE.INVOICELINENUM (a required field if created)

Here is a picture of what I am talking about. (Do not worry about security. the picture is from a demo test site so all information is fake)

 2136520946_Screenshot(90).thumb.png.ceb98377b3e98e6f1fe688f2bb1cb429.png

is there any way to check if these fields exist or not? (they do not exist unless the user clicks on "New Row")

Example: line 11 does not exist right now. How would I go about to see if it did or not? 

This is what I have so far:

SELECT DISTINCT iv.invoicenum, iv.description
FROM invoice     AS iv
JOIN invoiceline AS ivl ON iv.invoicenum = ivl.invoicenum AND iv.siteid = ivl.siteid 
/* = 'nothing' and yet somehow not null? */
WHERE iv.invoicenum NOT IN (SELECT invoicelinenum FROM invoiceline WHERE invoicelinenum IS NOT NULL)

I get 0 results where I should get more than 0. 

Edited by nooneclose
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6 minutes ago, nooneclose said:

WHERE iv.invoicenum NOT IN (SELECT invoicelinenum FROM invoiceline WHERE invoicelinenum IS NOT NULL)

You're comparing invoicenum and invoicelinenum that is oranges and shoes.

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Another excellent RegExp tutorial. Don't forget downloading your copy of up-to-date pcretest.exe and pcregrep.exe here
RegExp tutorial: enough to get started
PCRE v8.33 regexp documentation latest available release and currently implemented in AutoIt beta.

SQLitespeed is another feature-rich premier SQLite manager (includes import/export). Well worth a try.
SQLite Expert (freeware Personal Edition or payware Pro version) is a very useful SQLite database manager.
An excellent eBook covering almost every aspect of SQLite3: a must-read for anyone doing serious work.
SQL tutorial (covers "generic" SQL, but most of it applies to SQLite as well)
A work-in-progress SQLite3 tutorial. Don't miss other LxyzTHW pages!
SQLite official website with full documentation (may be newer than the SQLite library that comes standard with AutoIt)

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Solved it. The only problem is that they "don't exist" without a line number. (nonpersistent) The code does work its just a database issue at this point. 

Like always here is the final code:

SELECT distinct invoicenum, description
FROM invoiceline 
GROUP BY invoicenum, description  
HAVING SUM(invoicelinenum) < 1
ORDER BY invoicenum

 

Edited by nooneclose
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