Question : Average of numbers - count only records with complete data

I have a DB with a table that contains the core data (name, dept, RateJournal, RateBooks....). I have code written which will average the data for each field. The problem is some of the records do not have data for the "Rate.." fields. I want to count and average only those records for fields which have a number greater than 0. Not sure how to delete the incomplete records. Following is working code, but it is counting all records and then averaging. I am new to this type of calculations, please advise. Thanks.

<%
 
'Number of records with priority rankings
sqlCount = "SELECT count(*) AS records FROM tblClinicians "
Set objCount = objConn.Execute(sqlCount)
 
 
sqlRank = "SELECT ROUND(AVG(tblClinicians.RateJournal), 2) AS RateJournal, " & _
                                                "ROUND(AVG(tblClinicians.RateBooks), 2) AS RateBooks, " & _
                                                "ROUND(AVG(tblClinicians.RateDatabase), 2) AS RateDatabase, " & _
                                                "ROUND(AVG(tblClinicians.RatePOC), 2) AS RatePOC, " & _
                                                "ROUND(AVG(tblClinicians.RateMultiple), 2) AS RateMultiple, " & _
                                                "ROUND(AVG(tblClinicians.RateOther), 2) AS RateOther " & _
            "FROM tblClinicians "
Set objRank = objConn.Execute(sqlRank)
 
%>
 
 
 

 






 

 

<%=title%>

 

Total number of evaluations completed (includes ONLY those responses where rankings were completed):
 

Ranking: importance of the type of online resources (#1 is first/top priority -
#2 is second/2nd priority)
 
 

 
• Journals:  <%=objRank("RateJournal")%>

 
• Books:  <%=objRank("RateBooks")%>

 
• Database:  <%=objRank("RateDatabase")%>

 
• Point of Care Products:  <%=objRank("RatePOC")%>

 
• Multiple Resources in One:   <%=objRank("RateMultiple")%>

 
• Other:  <%=objRank("RateOther")%>

 
 

 
 
 
 
 

Answer : Average of numbers - count only records with complete data

re: "do not have data for the "Rate.." fields"
So, these fields probably allow NULL.
How about adding:
WHERE tblClinicians.RateJournal IS NOT NULL
  AND   tblClinicians.RateBooks  IS NOT NULL
  AND  etc.