Jerod  Mante

Jerod Mante

1602020040

SQL Aggregate Functions | Min, Max, Count, Avg, Sum In SQL

SQL aggregate functions are inbuilt functions that are used for performing various operations in data.  Aggregate Functions are used for performing operations on multiple rows of a particular column and result in a single value. An aggregate function allows you to perform the calculation on a set of values to return the single scalar value.

We often use the aggregate functions with the  GROUP BY and  HAVING clauses of the  SELECT statement.

Aggregate Functions are:

  1. AVG()
  2. COUNT()
  3. MAX()
  4. MIN()
  5. SUM()
  6. STDDEV()
  7. VARIANCE()

Let’s understand all this function with examples.

#Avg() in SQL

The avg() function is used to return an average value after the calculation performed in a numeric column.

#sql #sql aggregate

What is GEEK

Buddha Community

SQL Aggregate Functions | Min, Max, Count, Avg, Sum In SQL
Cayla  Erdman

Cayla Erdman

1594369800

Introduction to Structured Query Language SQL pdf

SQL stands for Structured Query Language. SQL is a scripting language expected to store, control, and inquiry information put away in social databases. The main manifestation of SQL showed up in 1974, when a gathering in IBM built up the principal model of a social database. The primary business social database was discharged by Relational Software later turning out to be Oracle.

Models for SQL exist. In any case, the SQL that can be utilized on every last one of the major RDBMS today is in various flavors. This is because of two reasons:

1. The SQL order standard is genuinely intricate, and it isn’t handy to actualize the whole standard.

2. Every database seller needs an approach to separate its item from others.

Right now, contrasts are noted where fitting.

#programming books #beginning sql pdf #commands sql #download free sql full book pdf #introduction to sql pdf #introduction to sql ppt #introduction to sql #practical sql pdf #sql commands pdf with examples free download #sql commands #sql free bool download #sql guide #sql language #sql pdf #sql ppt #sql programming language #sql tutorial for beginners #sql tutorial pdf #sql #structured query language pdf #structured query language ppt #structured query language

Jerod  Mante

Jerod Mante

1602020040

SQL Aggregate Functions | Min, Max, Count, Avg, Sum In SQL

SQL aggregate functions are inbuilt functions that are used for performing various operations in data.  Aggregate Functions are used for performing operations on multiple rows of a particular column and result in a single value. An aggregate function allows you to perform the calculation on a set of values to return the single scalar value.

We often use the aggregate functions with the  GROUP BY and  HAVING clauses of the  SELECT statement.

Aggregate Functions are:

  1. AVG()
  2. COUNT()
  3. MAX()
  4. MIN()
  5. SUM()
  6. STDDEV()
  7. VARIANCE()

Let’s understand all this function with examples.

#Avg() in SQL

The avg() function is used to return an average value after the calculation performed in a numeric column.

#sql #sql aggregate

Brad  Hintz

Brad Hintz

1594786380

SQL min() and max() Functions

SQL MIN() Function

The SQL min() function is used to find the minimum/lowest value in the given column. The syntax for using the function is given below.

1

2

3

**SELECT** **MIN**``(``**column**``)

**FROM** **Table**

**WHERE** condition;

Where, column and Table are the column name and table name respectively for which we need to find the minimum value. The [WHERE](https://www.journaldev.com/18411/sql-where-clause) condition is used to narrow down the set of values on the basis of the condition.

Let us look at an example to get a better understanding.

Example: The table below contains the score of 3 different students in 3 different subjects(Maths, Science, and English) out of 100.

RollNameMathsScienceEnglish1John9589902Kate7890913Alex879289

Table – Marks

Now, let us try to get the minimum marks that a student scored at Maths.

1

2

**SELECT** **MIN**``(Maths)

**FROM** Marks;

Output:

1

Example – To calculate the overall minimum marks that a student scored out of 300.

1

2

**SELECT** **MIN**``(Maths + Science + English)

**FROM** Marks;

Output:

1

259

We get the desired output as Roll 2 got the lowest total marks(78 + 90 + 91 = 259).

SQL MAX() Function

The SQL max() function on the other hand is used to find the maximum/highest value in the given column. The syntax for using the function is given below.

1

2

3

**SELECT** **MAX**``(``**column**``)

**FROM** **Table**

**WHERE** condition;

Similar to the min() function, here too column and Table are the column name and table name respectively for which the maximum value is to be calculated. The [WHERE](https://www.journaldev.com/18411/sql-where-clause) condition is used to narrow down the set of values on the basis of the condition.

Example – Considering the same Marks table used for the min() function, let us this time try to calculate the maximum marks that a student scored in English.

1

2

**SELECT** **MAX**``(English)

**FROM** Marks;

Output:

1

Example – To calculate the maximum marks that a student scored out of 300 in **all **the subjects.

1

2

**SELECT** **MAX**``(Maths + Science + English)

**FROM** Marks;

Output:

1

274

From the table Marks it is clear that Roll 1 has the highest total marks(95 + 90 + 89 = 274). Hence, the output is justified.

#sql #functions #max #min

Angela  Dickens

Angela Dickens

1598258580

MySQL Aggregate Functions - SUM,COUNT, MAX, MIN, AVG

In database management, an aggregate function or aggregation function, according to Wikipedia, is a function where the values of multiple rows are grouped to form a single summary value.

There are different aggregate functions, such as SUM, COUNT, MAX, MIN, AVG, etc. In this tutorial, we’ll cover the most used aggregate function in detail.

Contents

Introduction

Basically an aggragate function performs a calculation on a set of values, and returns a single value.

Consider the table of author that we usually use in our SQL tutorials. For illustration we added salary column.

Author Tabl

Let’s see how it works.

#mysql #snippets #mysql aggregate functions #function

Karlee  Will

Karlee Will

1618814160

MIN and MAX Aggregate Functions in SQL Server

SQL Server Functions

In database systems in general and in SQL Server in particular, functions are pieces of code that take zero or one input and return a single output or an array.

Table-Valued Functions which are typically user-defined can return an array, but in-built SQL Server functions are typically Scalar-Valued Functions. The third class of functions in SQL Server are Aggregate-Valued Functions. The MIN and MAX SQL Server functions are Aggregate-Valued Functions.

Window Functions are a relatively new class. They perform calculations like aggregate functions but do it over a set of rows related to the current row. While an aggregate function is likely to yield a single result by working on a column, a Window Function is more likely to yield a result for each row.

The SQL Server Functions classification can also ground on data type – String Functions, Numeric Functions, and Date Functions. We can deduce that String Functions operate on string values, e.g., LENGTH().

#sql server #sql functions #sql