Question
a.
SELECT YEAR, avg(num credits)
OVER (ORDER BY YEAR ROWS 3 preceding)
AS avg total credits
FROM tot credits;
b.
SELECT YEAR, avg(num credits)
OVER (ORDER BY YEAR ROWS 3 unbounded preceding)
AS avg total credits
FROM tot credits;
c.
ALL OF the mentioned
d.
NONE OF the mentioned
Posted under DBMS
OVER (ORDER BY YEAR ROWS 3 preceding)
AS avg total credits
FROM tot credits;
Engage with the Community - Add Your Comment
Confused About the Answer? Ask for Details Here.
Know the Explanation? Add it Here.
Q. Suppose we are given a view tot credits (year, num credits) giving the total number of credits taken by students in each year.The query that computes averages over the 3 preceding...
Similar Questions
Discover Related MCQs
Q. The functions which construct histograms and use buckets for ranking is
View solution
Q. The command ________________ such tables are available only within the transaction executing the query, and are dropped when the transaction finishes.
View solution
Q. OLAP stands for
View solution
Q. Data that can be modeled as dimension attributes and measure attributes are called _______ data.
View solution
Q. The generalization of cross-tab which is represented visually is ____________ which is also called as data cube.
View solution
Q. The process of viewing the cross-tab (Single dimensional) with a fixed value of one attribute is
View solution
Q. The operation of moving from finer-granularity data to a coarser granularity (by means of aggregation) is called a ________
View solution
Q. In SQL the cross-tabs are created using
View solution
Q. { (item name, color, clothes size), (item name, color), (item name, clothes size), (color, clothes size), (item name), (color), (clothes size), () }
This can be achieved by using which of the following ?
View solution
Q. What do data warehouses support?
View solution
Q. Which one of the following is the right syntax for DECODE ?
View solution
Q. Which of these query will display the the table given below ?
View solution
Q. Select * from employee where employee_id>1009;
Which of the following employee_id will be displayed?
View solution
Q. Consider the two relations instructor and department. Which of the following is used to create view for these relations together?
View solution
Q. Which of the following is used to provide privilege to only a particular attribute ?
View solution
Q. Which of the following statement is used to remove the privilege from the user Amir ?
View solution
Q. Which of the following is used to provide delete authorization to instructor ?
View solution
Q. Which of the following is true regarding views ?
View solution
Q. If we wish to grant a privilege and to allow the recipient to pass the privilege on to other users, we append the __________ clause to the appropriate grant command.
View solution
Q. In authorization graph if DBA provides authorization to u1 which in turn gives to u2 which of the following is correct ?
View solution
Suggested Topics
Are you eager to expand your knowledge beyond DBMS? We've curated a selection of related categories that you might find intriguing.
Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!
.png)
.png)
