public String getColValue(String col) {

		int count = 0;
		String alias = new String();
		if (col.contains(".")) {

			alias = col.split("\\.", 2)[0];
			col = col.split("\\.")[1];
			if (!getAlias().equalsIgnoreCase(alias)) {
				return null;
			}
		}
		for (CreateTable ct : Main.ct) {

			String t1 = ct.getTable().toString();
			String t2 = table;

			if (t1.equalsIgnoreCase(t2)) {

				for (Object s : ct.getColumnDefinitions()) {
					String col_defn = s.toString();
					if (col_defn.contains(col)) {
						return tuple[count];
					}

					count++;
				}
			}
		}
		return null;
	}