SQL
// make SQL query
QueryManager queryManager = workspace.getQueryManager();
// create query
String sqlStatement = "SELECT jcr:title FROM mix:title WHERE prop_pagecount < 90";
Query query = queryManager.createQuery(sqlStatement, Query.SQL);
// execute query and fetch result
QueryResult result = query.execute();
XPath
// make XPath query
QueryManager queryManager = workspace.getQueryManager();
// create query
String xpathStatement = "//element(*,mix:title)[@prop_pagecount < 90]/@jcr:title";
Query query = queryManager.createQuery(xpathStatement, Query.XPATH);
// execute query and fetch result
QueryResult result = query.execute();