If my solution doesn't help you, please let me know. BUT, we're in luck, this db-fiddle (note hyphen!) does support TRANSACTIONs - take a look at the complete answer to your question here. Unfortunately, dbfiddle doesn't appear to support this. To answer the second part of the question, do all the work (two separate statements) in one TRANSACTION (documentation here, example here). I'm not sure what the standard says about using these, but here is your example done using a join. Next time you ask a question, you might find it beneficial to set up a dbfiddle for those who are trying to solve your issue - help us to help you!īTW, SQLite (unlike other systems) doesn't support UPDATEs with JOINs.
You can find all this on the dbfiddle here. The result of SELECT * FROM master after the UPDATE: m_id m_value I did change the last WHERE clause to be based on the id column, so that it only updates the current record, and increments instead of storing max () on records for username. Then I ran the following query: UPDATE master Not 100 sure why didnt like my syntax, but using worked. To answer the first part of the question, I did the following:Īdded some records: INSERT INTO master VALUES (1, 'Buy') Unfortunately this doesn't seem to work, and I'm not even sure where to start on the DELETE. Value = (SELECT scheduled.value FROM scheduled WHERE scheduled.id = master.id)ĮXISTS (SELECT * FROM scheduled WHERE scheduled.due >= ?) I'm new the SQLite, the closest I have gotten is the following: UPDATE master I want to, copy from tableb, columnb1, columnb2, to tableb1. I'm trying to craft a query where if I run it after 12:01:00, I would like to see: Table: master I have two tables, with a same column named username, saying tablea, tableb. Imagine this is the starting state: Table: master Once the master table is updated, I would like to delete those values from the scheduled table. I would like to update a value in the master table with the value in the scheduled table if I run a query some time after due has occurred.
I have an application using SQLite with two tables a master table and a scheduled table.
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