[Ironboy]

Example code about sql part.

pawn Код:

mysql_format(mysql, query, sizeof(query), "SELECT `user` FROM `yourtable` WHERE `user` = '%e'", account); //you gotta change the table and column 
new Cache:result = mysql_query(mysql, query);
if(cache_get_row_count() != 0)
{
    //If the rows found
}
else
{
        //if no rows exists
}
cache_delete(result);