MongoDB CRUD Operations Two queries

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The query is the most we use.

Find ()

Querying all Rows

Query that specifies a keyword

So I want to see all the rows in this column.

The preceding {} represents the condition that I have not added.

Here is the Deptnolie that represents the line that I want to find uname is ly. The front _id:0 is representative I don't want to show _id this column

Here's what I want to see. All rows of these columns can be compared

Filter the xxx:0 of some columns.

Go heavy

Distinct ("Column name")

So I can get the value of this column back.

Paging Query

Constrained query with conditional restrictions

Skip the first few lines:

Start from line 3rd to line 6th (you can also see that the first 2 lines are skipped and the top 3 rows are taken)

MongoDB CRUD Operations Two queries