#Sqlite browser filter range full

So if you are using autoincrement, which I assume is the only way to manage a large tables primary key, what happens if you index that table to another column. When you create an index, is it permanent? As I understand it, the table is indexed by default using the primary key. A binary search will continue dividing the data in half and until the records are found or there is no more data to check. If the author is 'Gappah,' we know that, alphabetically, 'Rowling' comes after 'Gappah' and the 'Rowling' records must be in the second half of the first half of the table. The system will then check the middle row of the first half of the data. Because we know that our data is sorted by author, if the `author in the middle row is 'Tolkien,', we know that 'Rowling' comes, alphabetically, before 'Tolkien' and the records for 'Rowling' must be in the first half of the table. If we had sorted the data in our copied table by author, a binary search will start with the middle row of the table and check the author field. We can then sort that table sorted by author, by title, or by date (or by any other field we choose). we make a copy of the original data table. The system would then check the fourth record and so on. If the record does not match, it is not included in the query record. If this record matches the criteria, it is included in the query result. The system would then check the third record. The system would then check the second record. If the record matches, it is included in the query result.

#Sqlite browser filter range full

(It may be somewhat chronological if books entered were published after the database was created.)Ī full table scan would mean that the system would start with the first record and check the criteria. The article describes Do a 'full table scan' as 'look at every single row in the table, return the matching rows.' Remember that your data was likely entered in a random order, not in order by author or title.