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Answer: In a database, a key field is used to uniquely identify each record for retrieval or manipulation.
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-Chris
Answer:
With the Exclusive Lock, a data item can be read as well as written. Also called write lock. An exclusive lock prevents any other locker from obtaining any sort of a lock on the object. They can be owned by only one transaction at a time
Explanation:
Answer:
A hard disk provides a high-capacity alternative to magnetic storage media. It contains metal platters coated with a magnetic layer. The platters usually spin continuously when a computer is on, storing data in different sectors on the magnetic disk.
Explanation:
A cell is the basic unit for storing data in exel
