1. Order By :
Order by keyword sort the result-set either in ascending or in descending order. This clause sorts the result-set in ascending order by default. In order to sort the result-set in descending order DESC keyword is used.

Order By Syntax –

SELECT column_1, column_2, column_3...........
FROM Table_Name
ORDER BY column_1, column_2, column_3....... ASC|DESC;


Table_Name: Name of the table.
ASC: keyword for ascending order
DESC: keyword for descending order 

2. Group By :
Group by statement is used to group the rows that have the same value. It is often used with aggregate functions for example:AVG(), MAX(), COUNT(), MIN() etc. One thing to remember about the group by clause is that the tuples are grouped based on the similarity between the attribute values of tuples.

Group By Syntax –

SELECT function_Name(column_1), column_2
FROM Table_Name
WHERE condition
GROUP BY column_1, column_2
ORDER BY column_1, column_2; 

function_Name: Name of the aggregate function, for example:

SUM(), AVG(), COUNT() etc.

Table_Name: Name of the table. 

Let’s see the difference between Order by and group by clause:-

Attention reader! Don’t stop learning now. Get hold of all the important CS Theory concepts for SDE interviews with the CS Theory Course at a student-friendly price and become industry ready.