public Select columns(String... columns) {
		int counter = 0;
		//int added = 0;
		for (String column : columns) {
			if (column != null && column.length() != 0) {
				if (!column.contains("`")) {
					this.columns.add(column);
					//added++;
				} else {
					db.writeError("Column " + column + " in SELECT statement cannot have backticks.", false);
				}
			} else {
				db.writeError("Column at position " + counter + " cannot be null or empty in SELECT statement.", false);
			}
			counter++;
		}
		return this;
	}