Flag bytes with byte stuffing framing method
We had seen in previous article framing, that to send packets from sender to the receiver framing is required. But the question was how the … Read more
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Byte count framing method
We had seen in previous article framing, that to send packets from sender to the receiver framing is required. But the question was how the … Read more
Data Link Layer
Data link layer is the second layer in OSI model. As shown in image: As seen in the image above, the data link layer uses … Read more
Introduction to Concurrency control
Concurrency control is the procedure in DBMS for managing simultaneous operations without conflicting with each another. Concurrent access is quite easy if all users are … Read more
Oracle cursor
What is Cursor ? Cursor is a pointer in memory area called context area. What is context area ? Context area is a memory area … Read more
SQL Functions
Five Important aggregate functions are SUM, AVG, MIN, MAX and COUNT. They are called aggregate functions because they summarize the results of a query, rather … Read more