
GROUP BY name,mun HAVING name IN('Y100','X100')
SELECT type, count(1) AS countsFROM material
GROUP BY type。这是统计material表中type的重复次数
欢迎分享,转载请注明来源:内存溢出

GROUP BY name,mun HAVING name IN('Y100','X100')
SELECT type, count(1) AS countsFROM material
GROUP BY type。这是统计material表中type的重复次数
欢迎分享,转载请注明来源:内存溢出
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