Engineering/Database

Transactions and Concurrency Control in Database Systems

uppose a database contains the following bank accounts.Account IDOwnerBalanceA-100Isaac1,000,000B-200Sophie500,000To transfer 100,000 from Isaac to Sophie, the system must perform at least two changes:Subtract 100,000 from account A-100Add 100,000 to account B-200A simplified SQL implementation might look like this:UPDATE accountsSET balance = balance - 100000WHERE account_id = 'A-100';UPDATE ac..