[HazardouS]

Here you go:
https://sampwiki.blast.hk/wiki/MySQL/R33#mysql_tquery

Basically you're sending the query and you're calling a function when the query executes (successfully or not).

pawn Код:

mysql_tquery(connectionHandle, "SELECT Banned FROM players WHERE user = Bondage", "QueryResultCallback", "i", playerid); //passing the playerid as parameter to be able to send him a message if he's banned

public QueryResultCallback(playerid) //the only param of this function is playerid, which has been passed from the query
{
  //get the number of rows
  if(rows) // he's banned
  {
    //something - here you can use playerid to send the player a message and maybe kick him
  }
  else
  {
    //he's not banned - send a welcome message, call a login system if required etc
  }
}

Looks like there are 2 ways of getting the number of rows. Maybe there are more, but I only found these two:
[1] https://sampwiki.blast.hk/wiki/MySQL/R33..._get_row_count
[2] https://sampwiki.blast.hk/wiki/MySQL/R33#cache_get_data