I am not able to use two plugins at the same time

Hi,

I am trying to test camera plugin and sqlite plugin through existing examples. I have been trying to merge the two seperate examples to see whether I can use them for a project I want to work on or not. 
However, several rebuilds, I am not able have them work together. If I add the camera plugin first, then sqlite does not work. If I add the sqlite first, then the camera does not work. Is there an additional configuration that I must do in order to have them work together?
Keep in mind that I am still a college student, thus I may not be doing a fine work.

Thank you for your answers.

maybe you can explain how you add the plugins and how you try to use them.

Sorry, first time posting. Well I have downloaded an example of sqlite from github (this example to be precise: https://github.com/teerasej/Ionic-Example-SQLite), then, added camera plugin on it. I used node js command prompt to add the plugins (for sql i used: cordova plugin add https://github.com/litehelpers/Cordova-sqlite-storage.git and as for camera i used: cordova plugin add cordova-plugin-camera)