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Ebay Interview Question for Analysts


Country: United States
Interview Type: Phone Interview
More Questions from This Interview



Comment hidden because of low score. Click to expand.
1
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.
ex:
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.
0
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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