MongoDB: db.copyDatabase() method
db.copyDatabase
The db.copyDatabase method us used to copy a database either from one mongod instance to the current mongod instance or within the current mongod.
Syntax:
db.copyDatabase(fromdb, todb, fromhost, username, password, mechanism)
Parameters:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| fromdb | Name of the source database. | Required | string |
| todb | Name of the target database. | Required | string |
| fromhost | The hostname of the source mongod instance. Omit to copy databases within the same mongod instance. | Optional | string |
| username | The name of the user on the fromhost MongoDB instance. The user authenticates to the fromdb. | Optional | string |
Example: MongoDB: db.copyDatabase() method
The following command will display the help text of command findAndModify.
Here is the sample databases
> show dbs
admin 0.078GB
local 0.078GB
myinfo 0.078GB
payroll 0.078GB
test 0.078GB
db.copyDatabase("test","newtest");
Output:
> db.copyDatabase("test","newtest");
{ "ok" : 1 }
To see the newly created database use the following command.
> show dbs
admin 0.078GB
local 0.078GB
myinfo 0.078GB
<span class="style1">newtest 0.078GB</span>
payroll 0.078GB
test 0.078GB
The see the collections within the newly created database the following command can be used.
> use newtest
switched to db newtest
> show collections;
empdetails
invoice
orders
prod_mast
prod_master
restaurants
restaurants_new
system.indexes
userdetails
Retrieve the restaurants data from here
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db.commandHelp() method
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db.createCollection() method