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MySQLでの日付型の加算と減算

Posted at

普通に update_at < 数字
の形式もいいけど、N日先や、Nヶ月先ってが調べられる

select count(*) from user where updated_at < DATE_SUB( now(), interval '31' DAY ) ;
例:現在から三ヶ月先
DATE_ADD(CURRENT_DATE(),INTERVAL 3 MONTH)

例:現在から一ヶ月前
DATE_SUB(CURRENT_DATE(),INTERVAL 1 MONTH)

加算にはDATE_ADD()関数、減算にはDATE_SUB()関数です。
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