GROUP BY是您的朋友在这里:
select a,b,count(*) from testgroup by a,border by a
SQLFiddle:http
://sqlfiddle.com/#!9/062b0e/5
欢迎分享,转载请注明来源:内存溢出
GROUP BY是您的朋友在这里:
select a,b,count(*) from testgroup by a,border by a
SQLFiddle:http
://sqlfiddle.com/#!9/062b0e/5
欢迎分享,转载请注明来源:内存溢出
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