0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?

More than 5 years have passed since last update.

[WIP]ActiveRecordでのレコード数のカウント方法の差(count, length, size)

Last updated at Posted at 2019-03-02

メソッド 機能 キャッシュ利用
count SQLのCOUNTを使ってカウント しない
length SQLの実行結果の行数をカウント する
size SQLのCOUNTを使ってカウント する
ActiveRecordのcountとlengthとsize

size
Active Record の size vs count vs length をコードレベルで見てみた

0
0
0

Register as a new user and use Qiita more conveniently

  1. You get articles that match your needs
  2. You can efficiently read back useful information
  3. You can use dark theme
What you can do with signing up
0
0

Delete article

Deleted articles cannot be recovered.

Draft of this article would be also deleted.

Are you sure you want to delete this article?