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i have to write a SQL query

but there is no code playground for it

26th Mar 2017, 3:45 PM
Shekh Azim
Shekh Azim - avatar
2 Respuestas
+ 2
http://sqlfiddle.com
26th Mar 2017, 5:05 PM
Dinindu Wanniarachchi
Dinindu Wanniarachchi - avatar