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@na2mene

とある条件時に、レコードを除外するやり方

More than 1 year has passed since last update.

NOT EXISTS句使って除外テーブルを作成

sql
SELECT
*
FROM
  `xxx` `x`
  LEFT JOIN `yyy` `y`
    ON `x`.`id` = `y`.`x_id`               
WHERE
  NOT EXISTS ( 
    SELECT
      1
    FROM
      `xxx` `x2` 
    WHERE
      `x2`.`zzz` = 'hoge'
    AND
      # ここからは、突合せ
      `x`.`fuga` = `x2`.`fuga`
  );
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Help us understand the problem. What is going on with this article?