Exactly which table do you want these records in - TitanDailyData?
You want to create a batch of records for an event?
INSERT INTO TitanDailyData(TitanDate, Member) SELECT [enter some date], Player FROM Members;
Why don't you save TitanID instead of date into TitanDailyData? Why aren't you saving MemberID as foreign key instead of Player? TitanID, WarID, and MemberID are defined as primary keys. Primary key should be value saved as foreign key. Relationships should be set on primary and foreign keys.