CMD:mysql(playerid, params[])
{
    AdminCheck(playerid, 3);

    if(isnull(params)) return Usage(playerid, "/mysql [query]");

    mysql_tquery(conhand, params, "OnCustomQuery", "is", playerid, params);

    return 1;
}

forward OnCustomQuery(playerid, params[]);
public OnCustomQuery(playerid, params[])
{
    switch(mysql_errno())
    {
        case 0: format(strang, sizeof(strang), C_ADMIN"Query \"%s\"", params),
                 SendClientMessage(playerid, -1, strang),
                  SendClientMessage(playerid, -1, C_ADMIN"successfully executed.");

        case 1: format(strang, sizeof(strang), C_ADMIN"Query \"%s\"", params),
                 SendClientMessage(playerid, -1, strang),
                  SendClientMessage(playerid, -1, C_ADMIN"executed with warnings. Please check your query.");

        case 2: format(strang, sizeof(strang), C_ADMIN"Query \"%s\"", params),
                 SendClientMessage(playerid, -1, strang),
                  SendClientMessage(playerid, -1, C_ADMIN"could not be executed (ERROR TYPE: not found).");

        default: format(strang, sizeof(strang), C_ADMIN"Query \"%s\"", params),
                 SendClientMessage(playerid, -1, strang),
                  SendClientMessage(playerid, -1, C_ADMIN"could not be executed (ERROR TYPE: exception).");
    }

    return 1;
}