Ebay Interview Question for Analysts

Country: United States
Interview Type: Phone Interview

Comment hidden because of low score. Click to expand.
of 1 vote

WHERE is a condition on individual rows just like noraml select .....from.
HAVING clause introduces a condition on aggregations(results from the group by ... clause )i.e. results of selection where a single result, such as count, average, min, max, or sum, has been produced from multiple rows.
query to get employees whose salary is grater than 10000.

select empno,ename from emp where sal>10000;

query to get count of duplicate employees(based on empno)

select empno,count(*) from emp group by empno having count(*)>1

- vijay.edella August 26, 2014 | Flag Reply
Comment hidden because of low score. Click to expand.
of 0 vote

The difference is that the SQL WHERE clause can not be used with Aggregates functions to recuperate the result, but the HAVING can.

- thanh-liem.tran@hotmail.com September 04, 2014 | Flag Reply

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