[InfiniTy.]

Assuming you use blueg's mysql plugin

pawn Code:

// At the top \\

new gConn;

#define SQL_HOST_LOCAL "hostname"
#define SQL_USER_LOCAL "user"
#define SQL_PASS_LOCAL "password"
#define SQL_DB_LOCAL "database_name"

#define SQL_HOST_HOST "hostname"
#define SQL_USER_HOST "user"
#define SQL_PASS_HOST "password"
#define SQL_DB_HOST "database_name"

// Anywhere you want(Then add mySQL_init(); in OnGameModeInit callback) \\

stock mySQL_init()
{
    gConn = mysql_connect(SQL_HOST_LOCAL, SQL_USER_LOCAL, SQL_DB_LOCAL, SQL_PASS_LOCAL);

    if(mysql_ping() > 0) {
        printf("» Successfully connected to local database [%s].",SQL_DB_LOCAL);
    }
    else {
        print("» Couldn't connect to local database.");
        gConn = mysql_connect(SQL_HOST_HOST, SQL_USER_HOST, SQL_DB_HOST, SQL_PASS_HOST);
        if(mysql_ping() > 0) {
            printf("» Successfully connected to hosted database [%s].",SQL_DB_HOST);
        } else {
            printf("» Couldn't connect to any of the databases.Closing server...");
            SendRconCommand("exit");
        }
    }
    return 1;
}

Should work :d

Edit->Too slow