Question
What is the speed of light in
air?Solution
Light travels in a straight line. Light in the air is 1.0003 times slower than light in a vacuum, which slows it all the way down from 299,792,458 meters per second to 299,702,547 meters per second. That's a slowdown of 89,911 meters per second, which looks like a lot but is only three ten- thousandths of the speed of light. The speed of light in the air is 3 x 108 m/s.
Which SQL command is used to modify existing records in a table?
A materialized view differs from a normal view because it:
Which of the following is a key characteristic that distinguishes a PL/SQL `FUNCTION` from a PL/SQL `PROCEDURE`?
Which join returns rows from the left table even when there is no matching row in the right table, filling with NULLs for the right side?
Which type of index physically reorders the data rows in the table itself based on the index key, meaning the data is stored in the order of the index?
SQL Injection can be prevented by all EXCEPT:
What is an SQL `VIEW`?
Deadlock in DBMS can be prevented using:
What is the primary purpose of a `SEQUENCE` in SQL?
Which SQL statement combines the results of two queries and removes duplicates?
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