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收藏如:MongoDB的查詢蟒蛇
{"_id":Obj,"fir":1,"sec":1,"trd":"xxx"}
{"_id":Obj,"fir":1,"sec":2,"trd":"few"}
{"_id":Obj,"fir":1,"sec":3,"trd":"ver"}
{"_id":Obj,"fir":1,"sec":1,"trd":"xfsd"}
{"_id":Obj,"fir":1,"sec":2,"trd":"cdsv"}
{"_id":Obj,"fir":1,"sec":3,"trd":"xedsv"}
{"_id":Obj,"fir":1,"sec":1,"trd":"crv"}
{"_id":Obj,"fir":1,"sec":2,"trd":"cre"}
{"_id":Obj,"fir":1,"sec":3,"trd":"xewfr"}
{"_id":Obj,"fir":2,"sec":1,"trd":"xxx"}
{"_id":Obj,"fir":2,"sec":2,"trd":"few"}
{"_id":Obj,"fir":2,"sec":3,"trd":"ver"}
{"_id":Obj,"fir":2,"sec":1,"trd":"xfsd"}
{"_id":Obj,"fir":2,"sec":2,"trd":"cdsv"}
{"_id":Obj,"fir":2,"sec":3,"trd":"xedsv"}
{"_id":Obj,"fir":2,"sec":1,"trd":"crv"}
{"_id":Obj,"fir":2,"sec":2,"trd":"cre"}
{"_id":Obj,"fir":2,"sec":3,"trd":"xewfr"}
現在
,我希望得到這樣的結果:
{"_id":Obj,"fir":1,"sec":1,"trd":"xxx"}
{"_id":Obj,"fir":1,"sec":2,"trd":"few"}
{"_id":Obj,"fir":1,"sec":3,"trd":"ver"}
這意味着我只是想獲得一個「秒」文件爲每個sec.Can人知道如何查詢它?
有什麼標籤「SQL」,「巨蟒」,「pymongo」做這裏開始??? –