[fowlplay4]

If you're going to use SQL, you should leverage it else where.

Are you going to have a character slot system? If so you should establish a 'characters' table. I.e.

Characters

ID
Account

Then your other tables you should use the Character ID as the reference. I.e. For Quests:

Quests

ID - Autoincrementing integer
ScriptID - String - quest_id
Name
Description

QuestProgress

ID - Autoincrementing integer
Quest ID - Integer - Quest's ID
Character ID - Integer - Character's ID
Completed (Boolean)

Using this structure you can perform queries like...

PHP Code:

// Returns all quests player is currently on and has completed
public function getQuestData(pl) {
  temp.statement = format("SELECT Quests.name AS quest_name, Quests.description AS quest_description, QuestProgress.completed AS quest_completed
                             FROM Quests, QuestProgress
                            WHERE Quests.ID = QuestProgress.QuestID
                              AND QuestProgress.CharacterID = %s", formatstring2(pl.clientr.characterid));
                              
  temp.response = requestsql(temp.statement, true);
  if (temp.response.rows.size() > 0) {
    temp.data = {};
    for (temp.row: temp.response.rows) {
      temp.data.add({
        temp.row.quest_name,
        temp.row.quest_description,
        temp.row.quest_completed
      });
    }
    return temp.data;
  } else {
    return "";
  }
}

public function getQuestsCompleted(pl) {
  temp.statement = format("SELECT COUNT(Quests.ID) AS quests_completed FROM QuestProgress WHERE QuestProgress.CharacterID = %s AND quest_completed = 1", formatstring2(pl.clientr.characterid));
  temp.response = requestsql(temp.statement, true);
  return (0 + temp.response.rows[0].quests_completed);
}