
SQL - Function n Joins
Authored by nitin.43545 Aviral
Computers
12th Grade
Used 4+ times

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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Count() is which kind of function?
Single Row Function
Many Row Function
Multi row function
None
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Correct difference between count() and count (*) function is ....
count () will count total no. of values/null values in an attribute.
count (*) will count total no. of values in an attribute.
count () will count total no. of null values in an attribute.
count (*) will count total no. of values/null values in an attribute.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which command is use to display all tables/ relations in a database?
Show Databases
Show Tables
Display Tables
Display Databases
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not an aggregate function in mysql?
lower()
avg()
min()
max()
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Write query to display all employee records whose city is not mentioned in city column.
Table name : Employee
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following is not a constraint?
Unique
Primary Key
Not Null
Candidate key
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What will be best suited for Constraints:
fixed values
check or condition on an attribute
keyword
Reserve words
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