Good SQL refresher. If you know all the SQL given here you'll have a good start. Some bits do need more detail. Joins and nestled queries esp. but overall worthwhile completing. Thanks.
Surprisingly good. I'm not going through SQL for the first time, but this app has been really nice for reviewing.
Great! Probably one of the best of its kind ... or maybe, the BEST one!
Nice learning app and at the same time practising also
I deleted your app because of obnoxious notifications
Good application for beginners, examples and theory are easily understandable.
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Dcoder compiler: a mobile code compiler ide,where one can code, learn Algorithms
Python offline tutorial app to learn Python in simple and easy steps.