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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### 兩種實現方式 ### 1)先order by之后再分組: > SELECT \* FROM (SELECT \* from tb\_dept ORDER BY id descLIMIT 10000) a GROUP BY parent\_id; 不加**LIMIT**可能會無效,由于mysql的版本問題。但是總覺得這種寫法不太正經,因為如果數據量大于?Limit 的值后,結果就不準確了。所以就有了第二種寫法。 > SELECT \* FROM tb\_dept td,(SELECT max(id) id FROM tb\_dept GROUP BY parent\_id) md ?where td.id = md.id; 開發過程中真實sql語句舉例: ~~~ select * from (select * from cmf_guangnian_distribution order by id desc LIMIT 10000) m group by m.guangnian_id,m.user_id order by id desc ~~~
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