Sum 41 Deryck Whibley Hospitalized With Pneumonia Says Wife We Spent The Entire Night In The Er 's Rushed To Hospital And 'heart
总结 sql 中的两种使用场景：`sum (case when )` 和 `case when sum ()`，帮助理解它们在数据查询中的差异。 通常在 sql 查询中，`sum (case when )` 用于根据特定条件对.
Sum 41 Singer Deryck Whibley Hospitalized with Pneumonia, Wife Says
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