What are the grouping functions in mysql

Group function MySQL provides group functions for grouping and calculating result sets. The main functions are: COUNT(): Calculate the number of values ​​in the group SUM(): Calculate the sum of the values ​​in the group AVG(): Calculate the average value of the group MIN(): Find the minimum value in the group MAX(): Find the maximum value in the group GROUP_CONCAT(): Connect all values ​​in the group

Group function in MySQL

MySQL provides a variety of grouping functions for grouping data in query result sets and performing calculations. These functions are typically used with the GROUP BY clause.

Main grouping functions:

1. COUNT():

• Calculate the number of values ​​in the group .
• Example: COUNT(column_name)

2. SUM():

• Calculation group The sum of the median values.
• Example: SUM(column_name)

3. AVG():

• Calculation group The mean of the median.
• Example: AVG(column_name)

4. MIN():

• Find out The minimum value in the group.
• Example: MIN(column_name)

5. MAX():

• Find out The minimum value in the group.
• Example: MAX(column_name)

6. GROUP_CONCAT():

• Connection group String representation of all values ​​in .
• Example: GROUP_CONCAT(column_name)

##Other grouping functions:

In addition to the main grouping functions, MySQL also provides several other grouping functions, including:

• BIT_AND(): Calculate the binary AND of the values ​​in the group.
• BIT_OR(): Calculate the binary OR of the values ​​in the group.
• BIT_XOR(): Calculate the binary XOR of the values ​​in the group.
• STD(): Calculate the standard deviation of the values ​​in the group.
• VAR(): Calculate the variance of the values ​​in the group.

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