Shulou(Shulou.com)06/01 Report--

Root@adela-vm:/opt/mongodb_simple# numactl-- interleave=all bin/mongod-f conf/mongod.conf

About to fork child process, waiting until server is ready for connections.

Forked process: 4904

Child process started successfully, parent exiting

Root@adela-vm:/opt/mongodb_simple#. / bin/mongo 127.0.0.1:12345

MongoDB shell version: 2.6.9

Connecting to: 127.0.0.1:12345/test

> show dbs / / shows several databases

Admin (empty)

Local 0.078GB

> use adela / / switch to adela database without prior definition

Switched to db adela

> show dbs / / adela database does not add content, so it is not realistic

Admin (empty)

Local 0.078GB

>

The tables in RDBMS correspond to the collection collections in mongoDB, and the inserts are in json format

Db. Collection name (table) .insert (json format)

Db.adela_collection.insert ({"x": 1})

Show all collections

> show collections

Adela_collection

System.indexes

Insert data

> db.adela_collection.insert ({ypur2})

WriteResult ({"nInserted": 1})

> db.adela_collection.find ()

{"_ id": ObjectId ("5514f09641daf13c28f7bdb7"), "x": 1}

{"_ id": ObjectId ("5514f12b41daf13c28f7bdb8"), "y": 2}

_ id is automatically assigned by the system and can be customized, but _ id cannot be repeated.

> db.adela_collection.insert ({aVera 1, recorder 1})

WriteResult ({"nInserted": 1})

> db.adela_collection.insert ({aVera 2, recorder 1})

WriteResult ({

"nInserted": 0

"writeError": {

"code": 11000

"errmsg": "insertDocument:: caused by:: 11000 E11000 duplicate key error index: adela.adela_collection.$_id_ dup key: {: 1.0}"

}

})

Query adela_collection full table

> db.adela_collection.find () / / No parameters are added

Query data with x = 1

> db.adela_collection.find ({XRV 1})

{"_ id": ObjectId ("5514f09641daf13c28f7bdb7"), "x": 1}

{"_ id": ObjectId ("5514f1d241daf13c28f7bdb9"), "x": 1}

Insert a batch of data in a loop

> for (iTun1teri db.adela_collection.find ()

{"_ id": ObjectId ("5514f09641daf13c28f7bdb7"), "x": 1}

{"_ id": ObjectId ("5514f12b41daf13c28f7bdb8"), "y": 2}

{"_ id": ObjectId ("5514f1d241daf13c28f7bdb9"), "x": 1}

{"_ id": 1, "a": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe54"), "z": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe55"), "z": 2}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe56"), "z": 3}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe57"), "z": 4}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe58"), "z": 5}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe59"), "z": 6}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5a"), "z": 7}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5b"), "z": 8}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5c"), "z": 9}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5d"), "z": 10}

Count count

> db.adela_collection.find () .count ()

fourteen

How many pieces of data did skip skip?

Limit limits how many pieces of data to return

Sort uses sorting

> db.adela_collection.find ()

{"_ id": ObjectId ("5514f09641daf13c28f7bdb7"), "x": 1}

{"_ id": ObjectId ("5514f12b41daf13c28f7bdb8"), "y": 2}

{"_ id": ObjectId ("5514f1d241daf13c28f7bdb9"), "x": 1}

{"_ id": 1, "a": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe54"), "z": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe55"), "z": 2}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe56"), "z": 3}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe57"), "z": 4}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe58"), "z": 5}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe59"), "z": 6}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5a"), "z": 7}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5b"), "z": 8}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5c"), "z": 9}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5d"), "z": 10}

> db.adela_collection.find () .skip (4)

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe54"), "z": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe55"), "z": 2}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe56"), "z": 3}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe57"), "z": 4}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe58"), "z": 5}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe59"), "z": 6}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5a"), "z": 7}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5b"), "z": 8}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5c"), "z": 9}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe5d"), "z": 10}

> db.adela_collection.find () .skip (4) .limit (5)

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe54"), "z": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe55"), "z": 2}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe56"), "z": 3}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe57"), "z": 4}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe58"), "z": 5}

> db.adela_collection.find () .skip (4) .limit (5) .sort ({zan1})

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe54"), "z": 1}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe55"), "z": 2}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe56"), "z": 3}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe57"), "z": 4}

{"_ id": ObjectId ("5514f5eca1b17c0bb936fe58"), "z": 5}

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