From the table 'Results', Identify the suitable SQL...

From the table 'Results', Identify the suitable SQL expression? (i) Find out the student Who stood 2nd? (A) SELECT student-name FROM Result ORDERBY marks DESC limit 2 (B) SELECT student-name FROM Result ORDERBY marks DESC limit 1,1 (C) SELECT student-name FROM Result ORDERBY marks DESC limit 1,2 (D) SELECT student-name FROM Result ORDERBY marks DESC limit 2,1 (ii) Find out how many students scored $>=80$. (A) SELECT COUNT(*) FROM Result WHERE marks $>=80$ (B) SELECT COUNT FROM Result WHERE marks $>=80$ (C) SELECT SUM(*) FROM Result WHERE marks $>=80$ (D) SELECT SUM FROM Result WHERE marks $>=80$

From the table 'Results', Identify the suitable SQL expression?
(i) Find out the student Who stood 2nd?
(A) SELECT student-name FROM Result ORDERBY marks DESC limit 2
(B) SELECT student-name FROM Result ORDERBY marks DESC limit 1,1
(C) SELECT student-name FROM Result ORDERBY marks DESC limit 1,2
(D) SELECT student-name FROM Result ORDERBY marks DESC limit 2,1
(ii) Find out how many students scored $>=80$.
(A) SELECT COUNT(*) FROM Result WHERE marks $>=80$
(B) SELECT COUNT FROM Result WHERE marks $>=80$
(C) SELECT SUM(*) FROM Result WHERE marks $>=80$
(D) SELECT SUM FROM Result WHERE marks $>=80$

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Key Concepts

ORDER BY Clause

The ORDER BY clause in SQL is used to sort the result set of a query by one or more columns, in either ascending or descending order. This is essential for operations where the order of results matters, such as ranking records by a numerical value.

LIMIT Clause

The LIMIT clause restricts the number of rows returned by a query. When used with an offset, it allows you to skip a specified number of rows before returning the results. This is particularly useful in tasks that require returning a subset or a specific row from an ordered list, such as finding the second highest value.

Aggregate Functions

Aggregate functions, such as COUNT(), perform a calculation on a set of values and return a single value. This is particularly useful in summarizing data, for example, counting the number of rows that satisfy a given condition. COUNT() helps in determining totals over filtered datasets.

WHERE Clause

The WHERE clause is used to filter records in a SQL statement based on specified conditions. It is crucial for narrowing down the data to only those rows that meet certain criteria, such as selecting records where a column value meets or exceeds a specific threshold.

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