_____ databases rely upon concurrency control by locking database records to ensure that other transactions do not modify the database until the first transaction succeeds or fails,and as a result,can suffer from slow performance.
A) Query by Example (QBE)
B) Access
C) Structured Query Language (SQL)
D) Data manipulation language (DML)

Question

Quizplus · Accepted Answer

Structured Query Language (SQL) databases often rely upon concurrency control by locking database records to prevent other transactions from modifying the database until the first transaction is complete, which can lead to slow performance. QBE and Access do not typically use locking for concurrency control, and DML is a language used for manipulating data within a database rather than controlling concurrency.

_____ Databases Rely Upon Concurrency Control by Locking Database Records