Why does SELECT ... FOR UPDATE with a subquery create a snapshot in MySQL but INSERT ... SELECT does...

MySQL REPEATABLE READ: Outer transaction sees inner committed data, but only if its first SELECT is ...

Does Cassandra offer any semantics similar to REPEATABLE READ?...

Postgresql REPEATABLE READ can see data committed after transaction begins(and do nothing before oth...

PostgreSQL's Repeatable Read Allows Phantom Reads But its document says that it does not allow...

MySQL Repeatable Read isolation level and Lost Update phenomena...

Understanding InnoDB Repeatable Read isolation level snapshots...

Repeatable read regarding select * with order by and limit...

What concurrency issues can this PostgreSQL code create?...

Is it possible to do a Phantom read to a row someone just updated?...