How to use SQL as a DATABASE in matlab. Is it possible to run SQL commands from matlab?

yes it is possible using the MATLAB 

yes it's possible to run sql from matlab

Yes when ever there is RDBMS when can use sql commands and retrive data from the database,as we can use in matlab as well

Yes it's possiblewe can run SQL commands from a file on a connected data source by navigate it from toolbox , or another way