Answered: e an equivalent query using normal SQL…

e an equivalent query using normal SQL constructs, without using the tumbling window operator. You can assume that the timestamp can be converted to an integer value that represents

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter12: Subqueries And Merge Statements

Section: Chapter Questions

Problem 19MC

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Concept explainers

SQL Query

Structured Query Language is the full form of SQL. It is one of the standard languages to deal with the relational database. It is used to insert, update, delete, and search the records stored in a RDBMS. The relational databases are created and managed by using SQL.

Question

Consider the following query using the tumbling window operator: select item, System.Timestamp as window end, sum(amount) from order timestamp by datetime group by itemid, tumblingwindow(hour, 1).

Give an equivalent query using normal SQL constructs, without using the tumbling
window operator. You can assume that the timestamp can be converted to an integer
value that represents the number of seconds elapsed since (say) midnight, January 1,
1970, using the function to_ seconds(timestamp). You can also assume that the usual
arithmetic functions are available, along with the function floor(a) which returns the
largest integer ≤a.

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