SQL is not a "real" programming language, it's a way to get data from a database. The DBMS you are running will have a client library* so that your app can access the data on the server. SQL itself is very easy to pick up for the most part and if you are simply using it through a client provided in your DBMS package (rather than programming something yourself) then you will have no problems whatsoever.
* The client library will include functions for querying the database and your SQL will form one of the parameters for that function (for security reasons you should be careful about this, more info can be given if needed)