Beginning SQL

Chapter 3
112
Next, link the MemberDetails table:
SELECT
MemberDetails.MemberId,
MemberDetails.FirstName,
MemberDetails.LastName,
Attendance.MeetingDate,
Location.City
FROM
(MemberDetails INNER JOIN Attendance
ON MemberDetails.MemberId = Attendance.MemberId)
INNER JOIN Location ON Location.LocationId = Attendance.LocationId
ORDER BY MeetingDate, Location.City, LastName, FirstName
Order the results by meeting date, location, last name, and finally, first name. Remember, however, that
you require a list of members who have attended a meeting. Your results set from the Attendance table
should include only those records where the MemberAttended field contains a Y. So, to finalize your
query, add a WHERE clause:
SELECT
MemberDetails.MemberId,
MemberDetails.FirstName,
MemberDetails.LastName,
Attendance.MeetingDate,
Location.City
FROM
(MemberDetails INNER JOIN Attendance
ON MemberDetails.MemberId = Attendance.MemberId)
INNER JOIN Location ON Location.LocationId = Attendance.LocationId
WHERE Attendance.MemberAttended = ‘Y’
ORDER BY MeetingDate, Location.City, LastName, FirstName;
Executing the final query provides the results shown in the following table:
MemberId FirstName LastName MeetingDate City
6 Jenny Jones 2004-01-01 Windy Village
5 John Jones 2004-01-01 Windy Village
1 Katie Smith 2004-01-01 Windy Village
4 Steve Gee 2004-03-01 Orange Town
1 Katie Smith 2004-03-01 Orange Town
One final note before moving on: The vital point to remember is that SQL doesn’t compare just one
record in one set to just one record in the second set; SQL compares each record in one set to every record
in the other set, and vice versa. If the ON condition is true for a particular record, then the final results set