how to count 2 table into another one in access 2013? - ms-access

Question

I have 2 system log table in access 2013, one is loged by email and another one is loged by userid.
log1
email datetime msg
log2
userid datetime msg
I want to count how many msg the user send by month and save into a table user_msg_count
yearmonth userid msg_count
SELECT format([log1].datetime,"yyyy/mm") AS yearmonth, log1.email, COUNT(log1.msg) AS msg_count INTO user_msg_count
FROM log1
GROUP BY FORMAT(log1.datetime,"yyyy/mm", log1.email;
then I get userid from users table
users
userid email
UPDATE user_msg_count, users SET user_msg_count.userid = users.userid
WHERE user_msg_count.email = users.email;
but I dont know how to plus the log2 into the user_msg_count table.

Answer 1

Is the email the sender (User) email or the receipient?
If User email:
LogUnion query:
SELECT Users.UserID, Format([DateSend],"yyyymm") AS YrMo, "L1" AS Source FROM Users INNER JOIN Log1 ON Users.emailAdd = Log1.email
UNION ALL SELECT UserID, Format([DateSend],"yyyymm"), "L2" FROM Log2;
TotalCount query:
SELECT LogUnion.UserID, LogUnion.YrMo, Count(*) AS CountMsg
FROM LogUnion
GROUP BY LogUnion.UserID, LogUnion.YrMo;
Nested all-in-one query:
SELECT LogUnion.UserID, LogUnion.YrMo, Count(*) AS CountOfSource
FROM (SELECT Users.UserID, Format([DateSend],"yyyymm") AS YrMo, "L1" AS Source FROM Users INNER JOIN Log1 ON Users.emailAdd = Log1.email
UNION ALL SELECT UserID, Format([DateSend],"yyyymm"), "L2" FROM Log2) AS LogUnion
GROUP BY LogUnion.UserID, LogUnion.YrMo;