Computer Science Exit Exam Material

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Today, let's go through complete tutorial on SQL aggregate functions. https://t.me/ComputerScienceExitExam Aggregate functions are used to perform calculations on multiple rows of a table's column and return a single value. Here are the most commonly used aggregate functions: 1. COUNT(): Counts the number of rows in a table. 2. SUM(): Calculates the sum of a set of values. 3. AVG(): Calculates the average value of a set of values. 4. MIN(): Finds the minimum value in a set of values. 5. MAX(): Finds the maximum value in a set of values. ### 1. COUNT() The COUNT() function returns the number of rows that match a specified criterion. Syntax:

SELECT COUNT(column_name)
FROM table_name
WHERE condition;

Example: Count the number of customers in the Customers table.

SELECT COUNT(CustomerID) AS NumberOfCustomers
FROM Customers;

### 2. SUM() The SUM() function returns the total sum of a numeric column. Syntax:

SELECT SUM(column_name)
FROM table_name
WHERE condition;

Example: Calculate the total sales in the Orders table.

SELECT SUM(Sales) AS TotalSales
FROM Orders;

### 3. AVG() The AVG() function returns the average value of a numeric column. Syntax:

SELECT AVG(column_name)
FROM table_name
WHERE condition;

Example: Find the average order amount in the Orders table.

SELECT AVG(OrderAmount) AS AverageOrder
FROM Orders;

### 4. MIN() The MIN() function returns the smallest value of the selected column. Syntax:

SELECT MIN(column_name)
FROM table_name
WHERE condition;

Example: Find the lowest price in the Products table.

SELECT MIN(Price) AS LowestPrice
FROM Products;

### 5. MAX() The MAX() function returns the largest value of the selected column. Syntax:

SELECT MAX(column_name)
FROM table_name
WHERE condition;

Example: Find the highest price in the Products table.

SELECT MAX(Price) AS HighestPrice
FROM Products;

### Using Aggregate Functions with GROUP BY Aggregate functions are often used with the GROUP BY clause to group rows that have the same values in specified columns into summary rows. Syntax:

SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE condition
GROUP BY column_name;

Example: Get the total sales for each product.

SELECT ProductID, SUM(Sales) AS TotalSales
FROM Orders
GROUP BY ProductID;

### Using Aggregate Functions with HAVING The HAVING clause was added to SQL because the WHERE keyword could not be used with aggregate functions. HAVING allows us to filter records that work on summarized GROUP BY results. Syntax:

SELECT column_name, aggregate_function(column_name)
FROM table_name
WHERE condition
GROUP BY column_name
HAVING aggregate_function(column_name) condition;

Example: Get the total sales for each product where total sales exceed $1000.

SELECT ProductID, SUM(Sales) AS TotalSales
FROM Orders
GROUP BY ProductID
HAVING SUM(Sales) > 1000;

### Combining Aggregate Functions You can use multiple aggregate functions in the same query. Example: Get the total number of orders, average order amount, minimum order amount, and maximum order amount.

SELECT COUNT(OrderID) AS NumberOfOrders,
       AVG(OrderAmount) AS AverageOrder,
       MIN(OrderAmount) AS MinOrder,
       MAX(OrderAmount) AS MaxOrder
FROM Orders;

- COUNT(): Counts rows. - SUM(): Sums up values. - AVG(): Averages values. - MIN(): Finds the minimum value. - MAX(): Finds the maximum value. - GROUP BY: Groups rows that have the same values. - HAVING: Filters groups based on aggregate functions. https://t.me/ComputerScienceExitExam Hope it helps :) https://t.me/ComputerScienceExitExam

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The case of candidates who took the private exit exam It is known that the results of the 2016 candidate graduates of the public universities will be announced on June 21/2016. @ComputerScienceExitExam has heard that the results of the students of private higher education institutions who took the exit exam for the first time were released a few days ago and the examinees are looking at their results. However, the manager of the Ethiopian Private Higher Education and Technical and Vocational Training Institutions Association Ato Tefera Gebeyehu told Tikvah that there are still unfinished business regarding the results of private examinees who retook the exam. The manager stated that there will be more information on the issue of the examinees who retook the test privately, the problems they encountered and how their results will be explained. It is known that 124 private higher education institutions have given their students an exit exam this year. @ComputerScienceExitExam

Message for Graduating Students for this year (GC of 2024 /2016 EC). First of all, congratulations to the students who have overcome all the challenges of life and reached this level. Congratulations to you all GC of 2024 (both students of public and private universities) Congratulations to those who passed the #Exit_exam. It is good to show them how far they have come by passing the test. But there is no need for happiness. What are you happy about, don't you remember your friends who didn't score? Bzw #exit_exam is nothing special and if it is a lesson and an exam it is not new to students of this level, it is not surprising, it is a reminder of the same things you were learning. We cannot say that your full abilities and competencies are measured. What’s special but for the formalities, if we all studied for 16 or 17 years together! Just because you pass the test doesn't mean all life will succeed, and just because you lose the grade doesn't mean you fail! Failure is the inability to be open to learning and change, not scoring below your expectation! Those who did not score a pass in the #Exit_exam know that it is only for 1 to 5 marks! You feel it from your friends when you stumble over something small, and your partner feels it a lot. But I surprise you if you think this is a failure. You will take the test again and pass. You know you've been through challenges so this shouldn't surprise you. Know that you will not pass the test just because you know, and you will not fail to register if you do not know. Different circumstances and opportunities determine. The department we study is different, the environment is different, and the feelings we are in are different. There are departments that are easy to read and understand, and there are those that do not work easily with questions no matter how much you read. Every entity in this world is not competitive, it is unique in nature! So it is not a failure to say that you failed to succeed in your department for a while. since if you #like him #share. Updated announcement of the date @ComputerScienceExitExam to get the release date

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🎓 TO ALL GRADUATE STUDENTS 🎓 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ❣Heartfelt  CONGRATULATIONS to All the Graduates for their years of..                       💪hard work               🙇‍♂unwavering perseverance,       🧑‍💻countless hours of dedication, 🙅‍♂tireless efforts, and unyielding commitment to excellence! 🧑‍🎓 🎉Your remarkable achievements are a testament to your resilience and determination.🎉 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ ❇️ For those who did not pass the Exit Exam, remember that setbacks are just stepping stones to success. Stay determined, keep working hard, and use this experience as motivation to do even better next time. ❗️Please be informed that our channel will provide you with all the necessary study materials and model exams at all times. ❤️ Best of luck to all of you ❤️ ▬▬▬▬▬▬▬▬▬▬▬▬▬▬ 🅾 For Fast and Reliable info..⬇️ ▬▬▬▬▬▬▬▬▬▬▬▬▬▬          ⬇️ Join and Share ⤴️👇     ✳️  @ComputerScienceExitExam   🎯         ✳️  @ComputerScienceExitExam 🎯         ✳️  @ComputerScienceExitExam 🎯 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

Result #Exit_Exam #Remedial ⛔️ Exit Exam Result has been sent to institutions. ❇️ Remedial students results 👇 At https://result.ethernet.edu.et You can watch. 🅾 Dear students, share any comments and suggestions you have in the comment box. Join and Share for more👇         ✳️  @ComputerScienceExitExam   🎯         ✳️  @ComputerScienceExitExam 🎯         ✳️  @ComputerScienceExitExam 🎯 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

#UPDATE #Exit_Exam_2016 Check your score by below link after link release Dear Students, be reminded currently active exit exam URLs (domains). https://exitexam1.ethernet.edu.et https://exitexam2.ethernet.edu.et https://exitexam3.ethernet.edu.et https://exitexam4.ethernet.edu.et https://exitexam5.ethernet.edu.et https://exitexam6.ethernet.edu.et https://exitexam7.ethernet.edu.et Join and Share for more👇         ✳️  @ComputerScienceExitExam   🎯         ✳️  @ComputerScienceExitExam 🎯         ✳️  @ComputerScienceExitExam 🎯 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬

ExitExam The exit point has been announced. The Ministry of Education has sent the results of the exit examination to the universities. Universities will announce the results start from today. Join and Share for more👇         ✳️  @ComputerScienceExitExam   🎯         ✳️  @ComputerScienceExitExam 🎯         ✳️  @ComputerScienceExitExam 🎯 ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬