COUNT() with Condition in MySQL

The count() functions without any condition will just count all the rows in a specified table. But since we need to see the syntax when we put some conditions in the function. The general syntax looks like this:

Syntax:

SELECT COUNT(expression)

FROM table

WHERE condition;

• COUNT(): COUNT() is an aggregate function used to count the number of rows in a result set.

• expression: This parameter specifies the column or expression whose non-null values will be counted. It can be an asterisk (*) to count all rows or a specific column.

Another way to show the COUNT() Function:

Syntax:

SELECT COUNT(CASE WHEN condition THEN 1 ELSE NULL END) AS count_alias
FROM your_table;

Here, if the case statement is true then the count is incremented or else it is not incremented.

The Count() function in MYSQL is an inbuilt function that helps count the number of rows or values in a table. It can count based on the specific conditions given by the user which can help in targetted operations. There are certain times when we just need the values that satisfy a specific condition and not all the values of the column. This function is available in the 4.0 and above versions of MySQL.

In this article, This article delves into the concept of conditional counting in MySQL and demonstrates its practical usage. we will see the concept of the count() function with specific conditions and see the syntax with the output.