數據庫技術總結

書寫順序 select distinct * from ‘表名’ where ‘限制條件’ group by ‘分組依據’ having ‘過濾條件’ order by limit ‘展示條數’ 執行順序 from – 查詢 where – 限制條件 group by – 分組 having – 過濾條件 order by – 排序 limit – 展示條數 distinct – 去重 selec

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