Oracle學習筆記----group by, having等語句的執行順序

select xxx_name, count(*) as counter from table_y where [i]where_condition[/i] group by xxx_name having [i]having_condition[/i] order by [i]zzz[/i] 當咱們看到一個相似上述的包含了where, group by, having， order by等關鍵字

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