The statistics are not updated on SELECT, but when: - one or more rows are added to an empty table - more than 500 rows are added to a table with less than 5

The statistics are not updated on SELECT, but when: - one or more rows are added to an empty table - more than 500 rows are added to a table with less than 500 rows - more than 500 rows are added to a larger table and the number of rows added is larger than a percentage that depends on the table size (20% under 25,000 rows, 0.1% for 1 billion rows, several values in between) - when indexes are rebuilt, the associated statistic is rebuilt