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Site any two differences between Single Row Functions and Aggregate Functions.

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प्रश्न

Site any two differences between Single Row Functions and Aggregate Functions.

अंतर स्पष्ट करें
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उत्तर

Single Row Functions Aggregate Functions
Single row functions operate on individual rows and return a single value per row. Aggregate functions operate on groups of rows and return a single result for each group.
It can be used in SELECT, WHERE, and ORDER BY clause. It can be used in the SELECT clause only.
UPPER(name) → Converts each name to uppercase SUM(salary) → Returns total salary for all or a group of employees
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Functions in SQL
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 9: Structured Query Language (SQL) - Exercise [पृष्ठ १७६]

APPEARS IN

एनसीईआरटी Computer Science [English] Class 12
अध्याय 9 Structured Query Language (SQL)
Exercise | Q 1. c) | पृष्ठ १७६
एनसीईआरटी Informatics Practices [English] Class 12
अध्याय 1 Querying and SQL Functions
Exercise | Q 1. c) | पृष्ठ २३

संबंधित प्रश्न

______ is used to get a specified day of the month for a given date.


______ keyword is used to find out the number of values in a column?


Which of the following belongs to an "aggregate function"?


Assertion (A): COUNf function ignores DISTINCT

Reason (R): DISTINCT ignores the duplicate values.


Which of the following is not an aggregate function?


Identify Single Row function of MySQL among the following.


What will be returned by the given query? select mid("Computer", 2, 4) = ______.


What will be returned by the given query? select substr("Computer", 4) = ______.


What will be returned by the given query? SELECT MID('LeaminglsFun', 2, 4) = ______.


The ______ function returns m raised to the nth power.


Name a function of MySQL used to give position of the first occurrence of a string2 in string1.


Which of the following is not a date function?


Which of the following is not a text function?


Write the name of the functions to perform the following operation:

To display the day like “Monday”, and “Tuesday”, from the date when India got independence.


Write the name of the functions to perform the following operation:

To display the name of the month in which you were born.


Write the output produced by the following SQL statement:

SELECT LENGTH("Informatics Practices");


Write the output produced by the following SQL statement:

SELECT    LEFT("INDIA", 3),    RIGHT("Computer Science", 4), 


Write the outputs of the SQL queries based on the relations Teacher and Placement given below:

Table: Teacher

T_ID Name Age Department Date_of_join Salary Gender
1 Arunan 34 Computer Sc 2019-01-10 12000 M
2 Saman 31 History 2017-03-24 20000 F
3 Randeep 32 Mathematics 2020-12-12 30000 M
4 Samira 35 History 2018-07-01 40000 F
5 Raman 42 Mathematics 2021-09-05 25000 M
6 Shyam 50 History 2019-06-27 30000 M
7 Shiv 44 Computer Sc 2019-02-25 21000 M
8 Shalakha 33 Mathematics 2018-07-31 20000 F

Table: Placement

P_ID Department Place
1 History Ahmedabad
2 Mathematics Jaipur
3 Computer Sc Nagpur
  1. SELECT Department, avg(salary) FROM Teacher GROUP BY Department;
  2. SELECT MAX(Date_of_Join), MIN(Date_of_Join) FROM Teacher;
  3. SELECT Name, Salary, T.Department, Place FROM Teacher T, Placement P WHERE T.Department = P.Department AND Salary>20000;
  4. SELECT Name, Place FROM Teacher T, Placement P WHERE Gender = ’F’ AND T.Department = P.Department;

Which type of values will not be considered by SQL while executing the following statement?

SELECT COUNT(column name) FROM inventory;


If column “Fees” contains the data set (5000,8000,7500,5000,8000), what will be the output after the execution of the given query?

SELECT SUM (DISTINCT Fees) FROM student;


Based on the table STUDENT given here, write suitable SQL queries for the following:

Roll No Name Class Gender City Marks
1 Abhishek XI M Agra 430
2 Prateek XII M Mumbai 440
3 Sneha XI F Agra 470
4 Nancy XII F Mumbai 492
5 Himanshu XII M Delhi 360
6 Anchal XI F Dubai 256
7 Mehar X F Moscow 324
8 Nishant X M Moscow 429
  1. Display gender-wise highest marks.
  2. Display city-wise lowest marks.
  3. Display the total number of male and female students.

Write suitable SQL query for the following:

Display the position of occurrence of the string ‘COME’ in the string ‘WELCOME WORLD’.


Write suitable SQL query for the following:

Remove all the expected leading and trailing spaces from a column userid of the table ‘USERS’.


Explain the following SQL function using a suitable example.

DAYNAME()


Explain the following SQL function using a suitable example.

POWER()


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