MongoDB查询以查找FirstName和LastName的字段组合？
以下是要查询的字段组合查询-
> db.demo502.aggregate(
... [
... { "$redact": {
... "$cond": [
... { "$eq": [
... { "$concat": [ "$FirstName", " ", "$LastName" ] },
... "John Doe"
... ]},
... "$$KEEP",
... "$$PRUNE"
... ]
... }}
... ]
... )这将产生以下输出-
{ "_id" : ObjectId("5e875543987b6e0e9d18f56f"), "FirstName" : "John", "LastName" : "Doe" }热门推荐
10 白日庆典祝福语简短英语
11 除夕的拜年祝福语简短
12 搬家词简短祝福语朋友
13 拥有爱的祝福语简短
14 岗位考试顺利祝福语简短
15 除夕对同学简短祝福语
16 道士结婚文案祝福语简短
17 治愈语句祝福语大全简短
18 硕士毕业蛋糕祝福语简短