I Have been Getting this Error !! Although the Syntax is Right , Can anyone explain , it says Database method doesnt Exist

Question

Global class BatchClas1 Implements database.Batchable <Sobject> {
    Global Database.QueryLocator Start (Database.BatchableContext bcontext) {
        String Searching = 'Select Name , Id , Student_name__c From Student__c where Stream_Opted__c = \'Data\' ';

    **return Database.getQueryLocator(Searching);**
    }

    Global Void Execute (Database.BatchableContext bcontext, List<SObject> RecordstoPerform) {
        If (!RecordstoPerform.isEmpty()) {
            List<Student__c> StudentDelete = (List<Student__c>)RecordstoPerform;
            **Database.DeleteResult [] Results = Database.delete (StudentDelete ,False);**
        }
    }
    
    Global Void Finish (Database.BatchableContext bcontext) {
        System.debug('Operation Completed');
        AsyncApexJob J = [Select id,Status,TotalJobItems From AsyncApexJob where Id = :bcontext.getJobId()];
        System.Debug (bcontext.getChildJobId());
    }
}