MongoDB's common operations on collections (tables) and data

First, collection (table of corresponding database) 1, view all the collections in the current library

Show collections

2. Create new collection explicitly

Db.createcollection ("user")

Implicitly-Created

Db. user. Insert ({name: "Zhangsan"})

3. Deleting a Collection

Db. user. Dorpcollection ()

Ii. documents (rows in the corresponding database) 1, new (insert, save, Insertone/insertmany) 1.1, New with Insert method

Db. user. Insert ({name: "Zhangsan", Age:+, Sex: "Boy"})

or define the variables and save the variables first.

Lisi={name: "Lisi", Age:+, Sex: "Girl", Phone: "13999999999"}

Db. user. Insert (Lisi)

1.2. Use the Save method to add

Db. user. Save ({name: "Xiaoli", Age:, Sex: "Girl"})

or define the variables and save the variables first.

Wangwu={name: "Wangwu", Age:+, Sex: "Boy", Email: "XXX@xx. com"}

Db. user. Save (WANGWU)

1.3. Use Insertone (single INSERT, equivalent to insert) and Insertmany (BULK Insert)

Db. User <optional params>-insert  A document, optional parameters are:w, Wtimeout, Jdb. User [objects] <optional params>-Insert Multiple documents, optional parameters Are:w, Wtimeout, J

2. By deleting

Db. user. Dorp ()

3, change

4. Check

MongoDB's common operations on collections (tables) and data