How to compare two tables in access and filter by two criteria

HI. I am building an employee database. I have two subforms on the employee form in a tab control. There is a Certification Required subform and a Certifications Held subform. I need to compare the certs required to the certs held and return a list of missing or expired certifications. I can put that in another subform/tab or as a report. I need to filter the results by employee ID and also by Position ID. Certs required varies by Position ID. Can this be done in a query?
I have attached my database in progress. It isn't pretty yet but the basic function should be clear. Thanks!
Test1.accdb
esbyrtAsked:
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PatHartmanCommented:
Create a query that uses a left join.
Select ...
From tblRequired, Left Join tblHeld on tblRequired.CertID = tblHeld.CertID
Where tblHeld.CertID Is Null or tblHeld.ExpireDate <= Date()

This will select "missing" certs or expired certs.  I can't download the db right now so hopefully this explanation will suffice.
esbyrtAuthor Commented:
This is what I put in query (updated for my actual field names) but I keep getting an error that a reserved word is used, missing or misspelled argument, or incorrect punctuation. Can you spot the error? Thanks!

Select FROM tblCertsRequired, Left Join tblCertHeld on tblCertsRequired.CertID = tblCertHeld.CertIDNum
Where tblCertHeld.CertIDNum Is Null or tblCertHeld.ExpiryDate <= Date()
Rey Obrero (Capricorn1)Commented:
try this, copy and paste

Select * FROM tblCertsRequired
 Left Join tblCertHeld on tblCertsRequired.CertID = tblCertHeld.CertIDNum
 Where tblCertHeld.CertIDNum Is Null or tblCertHeld.ExpiryDate <= Date()

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PatHartmanCommented:
When you are unfamiliar with SQL, it is easiest to use the QBE.  Your query is missing the * in the select clause.
Rey Obrero (Capricorn1)Commented:
it also have an unnecessary comma before the word "Left"

Select FROM tblCertsRequired, Left
esbyrtAuthor Commented:
Thanks so much! That did the trick.
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