Sum 41 Deryck Whibley Says Bands Final Album Is Record Ive Always Wanted To Make Exclusive "i Am" Ready For The Fulllength The Kraze

Editorial Note: This article is written with editorial review and topic relevance in mind.

关键区别在于：在使用 `sum (case when )` 时，`case when` 语句中的判断字段必须是 `group by` 中的分组字段。而 `case when sum ()` 方法则相对灵活，但需要注意的.

IVE presenta su primer álbum completo con “I AM” Con K de Kpop