MongoDB Learning Notes < a >

Today I learned the basic operation of the shell, as follows:

1. Create a database Foobar

Use Foobar

2. Add a collection to the specified database and add a record

Db.person.insert ({"Name": "ABC"})

3. View all the Databases

Show DBS

4. Querying all documents in the database

Show collections

5. Querying data for a specified document

Db.person.find ()

If you query the data for the first bar, use Db.person.findOne ()

6. Updating document data

Db.perosn.update ({"Name": "abc"},{$set: {"name": "Abc123"}}) The entry statement means finding a document with name ABC and setting its name to abc123

7. Delete document data

Db.person.remove ({"Name": "ABC"})

8. Deleting a collection from a database

Db.person.drop ()

9. Deleting a database

Db.dropdatabase ()

MongoDB Learning Notes < a >