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SQL Min Function

The SQL MIN Function is an Aggregate Function used to find the Minimum value from the total records (or rows) selected by the SELECT Statement. The SQL Server MIN Function will ignore Null values. The syntax of the SQL Server MIN Function is

SELECT MIN ([Column_Name])
FROM [Source]

For this SQL Server Min Function, use the below data

SQL MIN FUNCTION

SQL MIN Example

The Min function in SQL Server returns the Minimum value from the total records present in the specified column. This MIN function query finds the Minimum yearly income present in the [Yearly Income] column from Customers table.

 -- SQL Server MIN Function example
SELECT MIN ([YearlyIncome]) AS [Minimum Income]    
  
  FROM [Customer]
SQL MIN FUNCTION 1

MIN Group By Clause

Generally, we usually check minimum product price (Lowest pricing product) belongs to a particular category or color, etc. In these circumstances, we use GROUP BY Clause to group the products by color or category. Next, use the SQL Min Function to find the Lowest pricing product present in each group. Let us see the SQL MIN Group By Example

 -- SQL Server MIN Function example
SELECT [Occupation]
       ,MIN ([YearlyIncome]) AS [Minimum Income]    
 FROM [Customer]
 GROUP BY [Occupation]

Above SQL Server Query will find the Customers associated with the particular Department and SELECT the minimum income in each department

SQL MIN FUNCTION 2

SQL MIN Having Clause

When we are grouping the data, In some instances, we usually check for the conditions against the aggregated data. In these conditions, we use the HAVING Clause along with Group By Statement. For instance, the following SQL Server MIN function query groups the Customers by their Occupation. Then finds the Minimum yearly Income present in each group.

 -- SQL Server MIN Function example
SELECT [Occupation]
       ,MIN ([YearlyIncome]) AS [Minimum Income]    
 FROM [Customer]
 GROUP BY [Occupation]
 HAVING MIN ([YearlyIncome]) > 50000

Below lines of code verify whether the Minimum Yearly income of each Group is greater than 50000 or not. If this is true, the corresponding records will be displayed.

HAVING MIN ([YearlyIncome]) > 50000

SQL MIN FUNCTION 3

SQL Min Subquery

While retrieving the data, in some instances, we check for the conditions against the aggregated data. In these situations, we have to use Subquery in SQL Where Clause. This SQL Server minimum function query returns the Customers whose [Yearly Income] is greater than the Minimum yearly income.

 -- SQL Server MIN Function example
SELECT [FirstName]
      ,[LastName]
      ,[YearlyIncome]
      ,[Education]
      ,[Occupation]
  FROM [Customer]
  WHERE [YearlyIncome] > 
        (SELECT MIN([YearlyIncome]) FROM [Customer])

From the first min function example, see that Minimum Yearly Income is 50000. So above Aggregate Function query display all the customers whose yearly income is greater than 50000

SQL MIN FUNCTION 4

Filed Under: SQL

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