你即將離開本站

並前往https://dba.stackexchange.com/questions/257069/strange-performance-of-a-top-n-query-with-postgres

Strange performance of a top-N query with Postgres

You can see that your second query has Rows Removed by Filter: 18562 , while at an average, the first query has Rows Removed by Filter: ...

確定！ 回上一頁

查詢 「Postgresql top N」的人也找了：

  1. Postgresql top
    2.
  2. PostgreSQL ROWNUM
    3.
  3. PostgreSQL RANK
    4.
  4. PostgreSQL top 1
    5.
  5. Postgresql group by - limit
    6.
  6. PostgreSQL SELECT
    7.
  7. PostgreSQL DISTINCT
    8.
  8. PostgreSQL ORDER BY
    9.