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SQL Server MAX

SQL Server MAX()  function is an aggregate function that is used to find the Maximum or Largest value of a column.





If a table have only single value then the maximum value will be a value itself.

If all values in a table are same then the maximum value will be a value itself.

Syntax

MAX ( columnname )

Lets look at an example of MAX() function in SQL Server.

Here we have a EMPLOYEE table named as EMP.

CREATE TABLE dbo.EMP ( 
EMPID INT NOT NULL, 
EMP_DEPT VARCHAR(50), 
EMP_NAME VARCHAR(50), 
EMP_SALARY NUMERIC(9,2)
)

 INSERT INTO dbo.EMP
(EMPID, EMP_DEPT, EMP_NAME, EMP_SALARY) 
VALUES
(101, 'PRODUCTION', 'RAJAT M',75000.00),
(102, 'PRODUCTION', 'MUKESH BHATIA',70000.00),
(103, 'PRODUCTION', 'MUSKAN MEHTA',75000.00),
(104, 'SALES', 'ROHAN B NARAYA',45000.00),
(105, 'SALES', 'SUSHIL DAS',40000.00),
(106, 'SALES', 'MANISH',45000.00),
(107, 'PRODUCTION', 'RAJESH SINGH',78000.00),
(108, 'HR', 'MOHIN KHAN',50000.00),
(109, 'HR', 'SUSHANT K SINGH',55000.00),
(110, 'HR', 'LAKSHYA RAWAT',55000.00),
(111, 'PRODUCTION', 'MANOJ KUMAR',75000.00),
(112, 'SALES', 'SUJOY M',40000.00),
(113, 'LOGISTIC', 'VINAY AGARWAL',35000.00),
(114, 'LOGISTIC','MUSTAKIM M',35000.00),
(115, 'LOGISTIC', 'VIJAY KUMAWAT',45000.00)

 

To get the Highest salary in the entire table

SELECT MAX(EMP_SALARY) AS MAX_SAL FROM dbo.EMP

Get the highest salary that is given to employees in each DEPARTMENT

SELECT EMP_DEPT, MAX(EMP_SALARY) AS MAX_SAL FROM dbo.EMP
GROUP BY EMP_DEPT

Get the highest paid salary for PRODUCTION Department

SELECT MAX(EMP_SALARY) AS MAX_SAL FROM dbo.EMP
WHERE EMP_DEPT = 'PRODUCTION'

Get the highest paid salary in each department that is greater than 45000

SELECT EMP_DEPT, MAX(EMP_SALARY) AS MAX_SAL FROM dbo.EMP
GROUP BY EMP_DEPT
HAVING MAX(EMP_SALARY) > 45000

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