Question: I need help writing a few SQL queries/codes. I'll post them below! Using ROWNUM to limit the size of the result. (Notice that SQL and

I need help writing a few SQL queries/codes. I'll post them below!

Using ROWNUM to limit the size of the result. (Notice that SQL and some systems use the LIMIT or TOP clauses. Oracle uses ROENUM to accomplish similar tasks.)

1) TOP-N query. For every employee whose salary is equal to one of the two lowest salaries, Find the ssn, lname, and salary.

2) RANK query Find the rank of the salary 30000 among all salaries. (HINT: The ranks in this database are 1 for 25000, 4 for 30000, 5 for 38000, and so on.) */

3) RANK query ... compare with the previous query. Find the rank of the salary 31000 among all salaries.

4) DENSE RANK query Find the dense rank of the salary 30000 among all salaries. Hint: The dense ranks in this database are 1 for 25000, 2 for 30000, 3 for 38000, and so on

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