Mongodb中数组元素的个数统计
集合中的记录格式如下：
{"ID":"0001",
"Fir":"0",
"Sec":"1",
"FirCard_NE":["0402003","0101002","0201001","0503001","0402003","0204001","0204002","0301001","0101001","0402003","0501001","0501002","0503001","0503002","0501002"],
"SecCard_NE":["0101001","0101001","0201001","0202001","0203001","0204001","0204002","0301001","0301004","0204001","0501001","0501002","0503001","0503002","0301004"]
}现在想统计在"Fir"为"0"的情况下，FirCard_NE字段中某个数组元素在整个集合中出现的次数（如统计在"Fir"为"0"的情况下，FirCard_NE中出现"0402003"的总次数）
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我说我不帅他们就打我，还说我虚伪
`if d['Fir'] == '0':
print(d['FirCard_NE'].count('0402003'))`2019-07-17 19:39:52赞同 展开评论
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