Suppose you have a table t with a column labeled 'XYZ. What is the difference between t.YYZ.cumsum() and t.XYZ.rolling(n).sum), where n is some integer (for example 10 or 100). You need to select all correct answers: O For cach row of the table, LYYZ.cumsum0 sums the values of XYZ from the beginning of the table until the current row O For cach row of the table, t.XYZ rolling(n) sum( sums the values of XYZ from the beginning of the table until the current row O For cach row of the table. t.XYZ.rolling(n).sum) sums the most recent nvalues of XYZ (including the current row) O In the last row of the table, tYYZ.cumsum) contains the sum of all valucs of thc column XYZ In the last row of the table, t:XYZrolling(n) sum() contains the sum of all valucs of the column XYZ.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Suppose you have a table t with a column labeled 'XYZ.
What is the difference between t.YYZ.cumsum() and t.XYZ.rolling(n).sum), where n is
some integer (for example 10 or 100).
You need to select all correct answers:
O For cach row of the table, LYYZ.cumsum0 sums the valucs of XYZ from the beginning of the
table until the current row
O For cach row of the table, t.XYZ.rolling(n) sum sums the values of XYZ from the besinning of
the table until the current row
O For cach row of the table, t.XYZ.rolling(n).sum) sums the most recent n values of XYZ
(including the current row)
O In the last row of the table, LYYZ.cumsum) contains the sum of all valucs of thc column XYZ
Ein the last row of the table, t.XYZ rolling(n).sum) contains the sum of all valucs of the column
XYZ.
Transcribed Image Text:Suppose you have a table t with a column labeled 'XYZ. What is the difference between t.YYZ.cumsum() and t.XYZ.rolling(n).sum), where n is some integer (for example 10 or 100). You need to select all correct answers: O For cach row of the table, LYYZ.cumsum0 sums the valucs of XYZ from the beginning of the table until the current row O For cach row of the table, t.XYZ.rolling(n) sum sums the values of XYZ from the besinning of the table until the current row O For cach row of the table, t.XYZ.rolling(n).sum) sums the most recent n values of XYZ (including the current row) O In the last row of the table, LYYZ.cumsum) contains the sum of all valucs of thc column XYZ Ein the last row of the table, t.XYZ rolling(n).sum) contains the sum of all valucs of the column XYZ.
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