關於SQL中IN語句中項精簡描述及組裝方法

舉例：select * from files where kid in (1,2,3,4,5,6,10,12,14) 優化：select * from files where kid >=1 and kid <=6 or kid in (10,12,14) 第一步：將1,2,3,4,5,6,10,12,14優化爲1-6,10,12,14 思路：將字符串分割爲整數數組並排序，而後從頭遍歷，若是是連續

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