Need Assistance Modifying Date Query

I have a query that is based off of a union query

SELECT clvpertech.clvtech1 AS Technician, Sum(clvpertech.CLVCode) AS CLVs
FROM clvpertech
GROUP BY clvpertech.clvtech1;


This is returning a sum of all the procedures a technician does for the entire database.
This is working.

I need to break this down by day, week , month, and year base off of the datecomp1 or datecomp2 or datecomp3 or datecomp4 fields having a date in them.

I made this query to get the daily results and it works
SELECT clvpertech2.clvtech1 AS Technician, Sum(clvpertech2.CLVCode) AS CLVs
FROM clvpertech2
WHERE (((clvpertech2.datecomp1)=Date$())) OR (((clvpertech2.datecomp2)=Date$())) OR (((clvpertech2.datecomp3)=Date$())) OR (((clvpertech2.datecomp4)=Date$()))
GROUP BY clvpertech2.clvtech1;


How can I add different queries to get the results by breaking down the date field for year, week, and month?

I tried this for the month but I get Invalid Procedure Call when I try to run it???

SELECT clvpertech2.clvtech1 AS Technician, Sum(clvpertech2.CLVCode) AS CLVs
FROM clvpertech2
WHERE (((clvpertech2.datecomp1)=DatePart("mmm",[datecomp1]))) OR (((clvpertech2.datecomp2)=DatePart("mmm",[datecomp2]))) OR (((clvpertech2.datecomp3)=DatePart("mmm",[datecomp3]))) OR (((clvpertech2.datecomp4)=DatePart("mmm",[datecomp4])))
GROUP BY clvpertech2.clvtech1;