Error: Too many input arguments while executing a database query

Hi i am trying to execute a Sql query in matlab. The sql uses select command for selecting a particular row using a columname which matches a value that is stored in variable like the following: q=value;%computed value. conn1=database('Dbname','',''); fna=exec(conn1,'select * from table1 where ImageName="',q,'"'); fna=fetch(fna); fda=fna.data;

When i execute this , i get an error : Error using ==> database.exec Too many input arguments.