I have never heard of UPDATE INNER JOIN before, and I suspect that is an extension that is unique to MS Access. The [latest release] of SQLite adds support for [UPDATE FROM]. This is also a non-standard SQL extension, but in the case of SQLite, we attempted to copy the syntax of [PostgreSQL] as closely as we could. I suspect that you will want to translate your query into a suitable UPDATE FROM statement. : https://www.sqlite.org/releaselog/3_33_0.html : https://www.sqlite.org/lang_update.html#upfrom : https://www.postgresql.org/docs/9.1/sql-update.html The offical way to quote identifiers in SQL is double quotes: ~~~~ UPDATE "activity_overview" .... ~~~~ The use of `[...]` for identifier quoting is distinctive to SQL Server and MS-Access. SQLite tries to copy that for compatibility. But you really should get into the habit of using the SQL standard `"..."` quoting if you can.