An application developer can guard against certain snapshot anomalies by appending a ______ clause to the SQL select query.
A. For update
B. For read
C. For write
D. None of the mentioned
Answer:A
An application developer can guard against certain snapshot anomalies by appending a ______ clause to the SQL select query.
A. For update B. For read C. For write D. None of the mentioned
Explanation: Adding the for update clause causes the system to treat data that are read as if they had been updated for purposes of concurrency control.