本文实例讲述了mongodb数据库基础操作。分享给大家供大家参考,具体如下:
>use test > db.test.insert({"name":1})
>show dbs
> use test > db.dropdatabase()
> db.title.insert({"name":"hyx"})
> show collections
>use test >db.title.drop()
> db.file.insert({name:"huangyuxin",age:11})
>db.files.find()
> document=({by:"hyx"}) { "by" : "hyx" } > db.file.insert(document) writeresult({ "ninserted" : 1 }) > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "huangyuxin", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "by" : "hyx" } >
> var res = db.file.insertmany([{"b": 3}, {'c': 4}]) > res { "acknowledged" : true, "insertedids" : [ objectid("5c6e8bba0fc535200b893f2b"), objectid("5c6e8bba0fc535200b893f2c") ] } > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "huangyuxin", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "by" : "hyx" } { "_id" : objectid("5c6e8bba0fc535200b893f2b"), "b" : 3 } { "_id" : objectid("5c6e8bba0fc535200b893f2c"), "c" : 4 } >
> db.file.update({"name":"huangyuxin"},{$set:{"name":"hyx"}}) writeresult({ "nmatched" : 1, "nupserted" : 0, "nmodified" : 1 }) > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "hyx", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "by" : "hyx" } { "_id" : objectid("5c6e8bba0fc535200b893f2b"), "b" : 3 } { "_id" : objectid("5c6e8bba0fc535200b893f2c"), "c" : 4 } { "_id" : objectid("5c6e8cdf0fc535200b893f2d"), "name" : "hyx" } >
> db.file.save({"_id" : objectid("5c6e8b1c0fc535200b893f2a"),"name":"hyx"}) writeresult({ "nmatched" : 1, "nupserted" : 0, "nmodified" : 1 }) > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "hyx", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "name" : "hyx" } { "_id" : objectid("5c6e8bba0fc535200b893f2b"), "b" : 3 } { "_id" : objectid("5c6e8bba0fc535200b893f2c"), "c" : 4 } { "_id" : objectid("5c6e8cdf0fc535200b893f2d"), "name" : "hyx" } >
> db.title.find() { "_id" : objectid("5c6e89060fc535200b893f27"), "name" : "yx" } > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "hyx", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "name" : "hyx" } { "_id" : objectid("5c6e8bba0fc535200b893f2b"), "b" : 3 } { "_id" : objectid("5c6e8bba0fc535200b893f2c"), "c" : 4 } { "_id" : objectid("5c6e8cdf0fc535200b893f2d"), "name" : "hyx" } > db.file.remove({"b":3}) writeresult({ "nremoved" : 1 }) > db.file.find() { "_id" : objectid("5c6e8a060fc535200b893f29"), "name" : "hyx", "age" : 11 } { "_id" : objectid("5c6e8b1c0fc535200b893f2a"), "name" : "hyx" } { "_id" : objectid("5c6e8bba0fc535200b893f2c"), "c" : 4 } { "_id" : objectid("5c6e8cdf0fc535200b893f2d"), "name" : "hyx" } >
>db.file.deletemany({})
>db.file.deletemany({ status : 1 })
> db.title.find({age:{$gt : 0}}) { "_id" : objectid("5c6f7d633ea8783bbfb7fd5e"), "age" : 10 } >
> db.title.find({age:{$gte : 1}})
> db.title.find({age:{$lt:13,$gt:10}}) { "_id" : objectid("5c6f7ded3ea8783bbfb7fd5f"), "age" : 12 } { "_id" : objectid("5c6f7e833ea8783bbfb7fd60"), "age" : 12 } >
> db.title.find({"name" : {$type : 2}}) { "_id" : objectid("5c6e89060fc535200b893f27"), "name" : "yx" } >
> db.title.find().limit(2) { "_id" : objectid("5c6e89060fc535200b893f27"), "name" : "yx" } { "_id" : objectid("5c6f7d633ea8783bbfb7fd5e"), "age" : 10 } >
> db.title.find({},{"name":1,_id:0}).limit(1) { "name" : "yx" } >
> db.title.find({},{'age':1,_id:0}).sort({age:1}) { } { "age" : 10 } { "age" : 12 } { "age" : 12 } > db.title.find({},{'age':1,_id:0}).sort({age:-1}) { "age" : 12 } { "age" : 12 } { "age" : 10 } { } >
>db.title.createindex({"age":1})
>db.title.createindex({"name":1,"age":-1})
>db.col.getindexes()
>db.col.totalindexsize()
>db.col.dropindexes()
>> db.title.dropindex({'age':1}) { "nindexeswas" : 2, "ok" : 1 } >
希望本文所述对大家mongodb数据库程序设计有所帮助。
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