[TheToretto]

There you go, if it exists, it'll return the value 1 which is true, else 0 which is false.

pawn Код:

CMD:alter(playerid, params[])
{
    new query[128];
    mysql_format(Database, query, sizeof(query), "SHOW COLUMNS FROM `sa-mp_test` LIKE 'column1'");
    mysql_tquery(Database, query, "ColumnCheck");
    return 1;
}

forward ColumnCheck();
public ColumnCheck()
{
    printf("It returned the value %d", cache_num_rows());
    return 1;
}