Continue with your mobile number
The HAVING clause is used in SQL to filter groups created by the GROUP BY clause based on an aggregate function. 1. Aggregate Filtering: Unlike the WHERE clause, which filters rows before grouping, HAVING applies conditions on grouped data. 2. Purpose in Query: In this query, the HAVING clause ensures that only those departments with more than 5 employees (as determined by COUNT(*)) are included in the result set. 3. Execution Process: o The GROUP BY groups the data by department_id. o The COUNT(*) calculates the number of employees in each department. o The HAVING clause filters out groups where COUNT(*) is less than or equal to 5. This differentiation between WHERE and HAVING is crucial for effective data querying. Why Other Options Are Incorrect: • A) To filter rows before grouping them: The WHERE clause performs pre-grouping filtering, not HAVING. • C) To apply a condition to the entire table: HAVING only applies conditions to grouped results. • D) To apply conditions only to the COUNT(*) function: While COUNT(*) is used, the HAVING clause applies to groups as a whole. • E) To sort the rows by department_id: Sorting is achieved using the ORDER BY clause, not HAVING.
Ten women working nine hours a day complete a particular job in 20 days. If an additional 20 women were employed and they all worked 12 hours a day, ho...
P, Q, and R can complete a task in 2x, 25x, and x days respectively when working alone. If they complete the task together in 19200 days, how many...
‘A’ and ‘B’ can do a piece of work in 18 days and 25 days, respectively. They started working together but ‘A’ left after 9 days. Find the t...
A and B together, B and C together and A and C together can complete a piece of work in 18 days, 15 days and 10 days respectively. Find the ratio...
‘A’ alone can complete a work in 40 days while ‘A’ and ‘B’ together can complete the same work in 20 days. How much ...
Dhamu can complete a task on his own in 10 days. When Dhamu collaborates with Gaja, they can finish the same task in 6 days. Determine the number of da...
Anupam requires 30% more time than Aman to complete a certain task. If both of them work together and earn a total of Rs. 23,000, determine Anupam's sha...
Working in a shift of 5 hours 39 workers take 12 days to build a stretch of highway. In how many days will 30 workers working 6 hours a day, complete th...
A, B, and C each have different rates of completing a task; A can finish it in 36 days, B in 60 days, and C in 30 days. Initially, they begin the work c...
‘A’ can do a piece of work in 12 days. ‘B’ can do 70% of the same work in 30 days. If they work together for the entire time and...