数据库技术总结

书写顺序 select distinct * from ‘表名’ where ‘限制条件’ group by ‘分组依据’ having ‘过滤条件’ order by limit ‘展示条数’ 执行顺序 from – 查询 where – 限制条件 group by – 分组 having – 过滤条件 order by – 排序 limit – 展示条数 distinct – 去重 selec

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