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How do I insert data in database using angularjs?
How can I use the $http service to insert data?
First, you need to create a new object with the data you want to insert. For example, let's say you want to insert a new user with a name and an email: 
     
     var newUser = {
         name: "John Doe",
         email: "johndoe@example.com"
     };

Then, use the $http service like this: 

     $http({
         method: 'POST',
         url: '/api/user',
         data: newUser
     }).then(function successCallback(response) {
         // handle success
     }, function errorCallback(response) {
         // handle error
     });

Replace '/api/user' with the endpoint where you want to send the POST request, and handle success or error according to your needs.