how to save a output in mongodb

Question

i have a mongodb that it has many column Contains Id , name and phone number.I used a command to get the length of the phone numbers.I want to add the output obtained from the length of the phone numbers in a column to my database.I used the following command for this

db.rs1.aggregate( [ { $project: { "_id": 1,"phone number": 1, "length": { $strLenCP: "$phone number" }; ])

But the output (length) just appears, but not saved.How can I add this output(length) as a new column to my database

Possible duplicate of [Aggregation with update in mongoDB](https://stackoverflow.com/questions/19384871/aggregation-with-update-in-mongodb) — Mazki516, Feb 09 '19 at 22:20

score 0 · Answer 1 · answered Feb 09 '19 at 22:18

0

It's a duplicate question weather you intended or not :)

The aggregation pipeline and the update is done in two different steps.

better look here Aggregation with update in mongoDB

answered Feb 09 '19 at 22:18

Mazki516

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I did not notice anything from the link you sent me to. In that link, it uses <> if in my database this line is not readable. – rshahrami Feb 09 '19 at 22:34
you should replace it with your table name . – Mazki516 Feb 09 '19 at 22:38
i means this part << cust_to_clear >> . i change the name of << cust_to_clear >> But it makes a mistake. – rshahrami Feb 09 '19 at 22:42
The answers are meant to be run as a script inside mongo terminal . this will surly help you: https://docs.mongodb.com/manual/tutorial/write-scripts-for-the-mongo-shell/ – Mazki516 Feb 09 '19 at 22:54
i have a problem in script. i have a error in mongodb shell .when i used <> in shell i have a error. how to use a script in mongodb shell? – rshahrami Feb 12 '19 at 13:26

how to save a output in mongodb

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