Function tbl_delete

lib_acl_cpp/samples/sqlite/sqlite.cpp:128–152

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// ɾ��������
static bool tbl_delete(acl::db_handle& db, int n)
{
	const char* sql_fmt = "delete from group_tbl where group_name='���-%d'";

	acl::string sql;
	sql.format(sql_fmt, n);

	if (db.sql_update(sql.c_str()) == false)
	{
		printf("delete sql error\r\n");
		return (false);
	}

	for (size_t i = 0; i < db.length(); i++)
	{
		const acl::db_row* row = db[i];
		for (size_t j = 0; j < row->length(); j++)
			printf("%s, ", (*row)[j]);
		printf("\r\n");
	}
	// �ͷŲ�ѯ���
	db.free_result();

	return (true);
}

class db_thread : public acl::thread
{