On 8/7/22 00:30, Frank Millman wrote: > Hi all > > Apologies if this is an FAQ, but I could not find the answer I was looking > for. > > I want to run two SELECTs, one immediately after the other. > > I want to ensure that no other process updates the database in between the > two. > > What is the best way to achieve this? You probably want to put the queries in a Repeatable Read transaction, or even a READ ONLY serialized transaction. https://www.postgresql.org/docs/12/transaction-iso.html#XACT-REPEATABLE-READ https://www.postgresql.org/docs/12/transaction-iso.html#XACT-SERIALIZABLE https://www.postgresql.org/docs/12/sql-set-transaction.html -- Angular momentum makes the world go 'round.
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