摘要: Table ID Amount Number 1 28.26 NULL 2 NULL NULL 3 NULL NULL SQL SELECT SUM(Amount),SUM(Number),COUNT(Amount),COUNT(Number),COUNT(1) FROM Test SELECT S 阅读全文
posted @ 2017-12-01 10:42 平小宅 阅读(149) 评论(0) 推荐(0) 编辑