sqlite3 query by max and filter by second factor

Question

I have:

TABLE MESSAGES
 message_id | conversation_id | from_user | timestamp  |  message

I want:

1. SELECT * WHERE from_user &l         


        

Answer 1

ok it was more simple than I thought:

basically to change select from:

max(message_timestamp)

to:

max(message_timestamp || message_id)   
or  max(message_timestamp + message_id) 

so it will search for max on concatenation of timestamp and message_id

ps. after a digging - it's working only if message id is growing with timestamp ( order of insertion is preserved )

edit:

edit2 :

so why it works ?

SELECT max(message_timestamp+message_id), message_timestamp, message_id, message_conversationId, message_from,message_text
FROM MESSAGES
WHERE message_conversationId = 1521521
AND message_from <> 'me'
ORDER by message_Timestamp DESC