Difference between while and having

Question

Accepted Answer

While is a loop statement used for iterating over a block of code until a condition is met. Having is a clause used in SQL to filter results based on a condition.

While is used in programming languages like Python, Java, etc. to execute a block of code repeatedly until a condition is true.
Having is used in SQL to filter results based on a condition that is applied to a group created by the GROUP BY clause.
While loops can be infinite if the condition is never met, whereas Having clause will only return results that meet the specified condition.
Example of while loop: while x < 10: print(x); x += 1
Example of Having clause: SELECT column_name FROM table_name GROUP BY column_name HAVING COUNT(column_name) > 1

Difference between while and having

Popular interview questions of Senior Analyst