Question

Table must always store not more then 25 records. It means when I insert new array of records, I must control total number of records and if it’s more then 25, it’s necessary to remove some old. (table has integer primary key & text field datetime of inserting). How can I manage it?

Answer 1

I think, you just need the algorithm

1. Insert your new records
2. Select all entries ordered by date and check if the result has more than 25 entries
3. If it has, get the date of the 25th. entryLast
4. Delete all entries that are older entryLast