Order By and Group By Clause in SQL

In this SQL tutorial we will learn how to use Order by and Group By in SQL. Group By in SQL is used to arrange similar data into group and Order By in SQL is is used to sort the data in the ascending or descending order.

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Order By in SQL

SQL Order By is used to sort the data in the ascending or descending order. It sorts the data in ascending order by default. To sort the data in descending order we use DESC keyword.

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Syntax of Order By in SQL:

SELECT column1, column2….
FROM table_name
ORDER BY column1 ASC/DESC, column2 ASC/DESC;

Example:
Sort all the students in the ascending order in SQL by the “marks” column.

SELECT Name
FROM Student_details
ORDER BY Roll_no ASC;

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Group By in SQL:

It is used to arrange similar data into group. The GROUP BY clause follows the WHERE clause and comes before the ORDER BY clause.

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Syntax of Group By in SQL:

SELECT column1, column 2…
FROM table_name
WHERE [condition]
GROUP BY column1, column2
ORDER BY column1, column2;

Example:
If we want to know the total marks of each student, then GROUP BY is used as follows:

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SELECT Name, Sum(marks)
FROM Student_details
GROUP BY Name;

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