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Lua Collect all ids of a column located within a database table

MorganaSacani

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Hello World!
I created an auxiliary table for my database called 'test_server_storage'.
In this table there are two columns. The 'player_id' column and the 'item_id' column.
I'm trying to collect all ids that are in the columns called 'item_id' of a certain player, in this case 'player_id'. And after collecting the ids, I'm trying to make these columns receive the value 0.
I started by creating a 'while do' loop structure, but it only works once.
The function collects only the first value of the 'item_id' column and then clears all columns of the same name.
This is the part of my algorithm I'm struggling to get working.
I don't understand much about SQL commands:
Lua:
local playerGuid = player:getGuid()
local inbox = player:getSlotItem(CONST_SLOT_STORE_INBOX)
while playerGuid == result.getNumber(db.storeQuery("SELECT player_id FROM test_server_storage WHERE player_id = " .. playerGuid), "player_id") do
    inbox:addItem(itemId_, 1) -- Here I need my algorithm to add all the id present in the 'item_id' column for my character.

    db.query("UPDATE test_server_storage SET item_id = 0")
    db.query("UPDATE test_server_storage SET player_id = 0")
end
Does anyone know how to help me?
Post automatically merged:

I remembered one more problem:
In addition to this algorithm cleaning all 'item_id', it cleans all 'player_id', even though they are not the same id as my player.
 
When I use this query inside my database, in the SQL area:
SQL:
SELECT item_id FROM test_server_storage WHERE player_id = 6 AND item_id > 0;
The value of all columns called 'item_id' of my player with id 6 is returned to me. For example:
3387
3388
3389
3420

But, when I try to make the same query inside my server, the algorithm returns only the first value, for example:
3387

I tested printing on the console.
Post automatically merged:

On my server I use the query this way:
Lua:
result.getNumber(db.storeQuery("SELECT item_id FROM test_server_storage WHERE player_id = " .. player:getGuid() .. " AND item_id > 0;"), "item_id")
 
You need to call this at the end of your loop:

Code:
result.next(resultId)

Also I think the loop may be wrong.

I would do this this way (taken from tfs)

Code:
    local resultId = db.storeQuery("SELECT player_id, item_id FROM test_server_storage WHERE player_id = " .. playerGuid)

    if resultId then
        repeat
                local playerId = result.getNumber(resultId, "player_id")
                local balance = result.getNumber(resultId, "balance")

        until not result.next(resultId)
        result.free(resultId)
    end

And your query with "SELECT" missed the item_id attribute, so I've added it.

And to clear by player ID, you can do the following:

Code:
db.query("DELETE FROM test_server_storage WHERE player_id = " .. playerId)

Regards :p
 
Thanks Slaw! You helped me a lot. Now it's working and here's the solution in case anyone has the same question:
Lua:
if resultId then
    repeat
        local playerId = result.getNumber(resultId, "player_id")
        db.query("DELETE FROM test_server_storage WHERE player_id = " .. playerId)
        local itemId = result.getNumber(resultId, "item_id")
        print(itemId)
    until not result.next(resultId)
    result.free(resultId)
end
 
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