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想象,我有2个表,我想计算出最畅销的艺人:MySQL的嵌套计数声明
- 音乐(ID,标题,条形码)
艺术家(条形码,艺术家)
SELECT COUNT(m.barcode) AS sells, m.barcode, artist FROM music m LEFT JOIN artists a ON m.barcode = a.barcode GROUP BY m.barcode ORDER BY sells DESC
该查询返回如:
sells | barcode | artist
---------------------------------
1000 123 jdoe
500 223 kloe
100 321 jdoe
我该如何计算jdoe复杂地销售1100首音乐?
预先感谢任何暗示
呃,组由艺术家吗? – Strawberry
如果您不关心个别条形码,为什么选择和分组? –