Query Of Multiple columns in Ext-js store

You can Query Multiple Columns instant of using one column

store.queryBy(function(record,id){
     return (record.get('oneField') == someValue && record.get('secondField') == otherValue);
});

and also you can add number of variables using '&&' or '||' conditions

Example:

eventStore.queryBy(function(record,id){
          return (record.get('StartDate') >= (new Date()).clearTime().add(Date.HOUR,3) && record.get('EndDate') <= (new Date()).clearTime().add(Date.HOUR,10));

});