[GENERAL] Are subselects treated as atomic single commands?

Hi, the docu about the Read Committed Transaction Isolation Level pointed out: "... The point at issue here is whether or not within a single command we see an absolutely consistent view of the database.". Because i dont want to use the Serializable Transaction Isolation Level or table locks if i

[GENERAL] Are subselects treated as atomic single commands?

Hi, the docu about the Read Committed Transaction Isolation Level pointed out: "... The point at issue here is whether or not within a single command we see an absolutely consistent view of the database.". Because i dont want to use the Serializable Transaction Isolation Level or table locks if