Teradata - Aggregate Functions

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Teradata supports common aggregate functions. They can be used with the SELECT statement.

  • COUNT − Counts the rows

  • SUM − Sums up the values of the specified column(s)

  • MAX − Returns the large value of the specified column

  • MIN − Returns the minimum value of the specified column

  • AVG − Returns the average value of the specified column

Example

Consider the following Salary Table.

EmployeeNo Gross Deduction NetPay
101 40,000 4,000 36,000
104 75,000 5,000 70,000
102 80,000 6,000 74,000
105 70,000 4,000 66,000
103 90,000 7,000 83,000

COUNT

The following example counts the number of records in the Salary table.

SELECT count(*) from Salary;  

  Count(*) 
----------- 
    5

MAX

The following example returns maximum employee net salary value.

SELECT max(NetPay) from Salary;   
   Maximum(NetPay) 
--------------------- 
       83000

MIN

The following example returns minimum employee net salary value from the Salary table.

SELECT min(NetPay) from Salary;   

   Minimum(NetPay) 
--------------------- 
        36000

AVG

The following example returns the average of employees net salary value from the table.

SELECT avg(NetPay) from Salary; 
  
   Average(NetPay) 
--------------------- 
       65800

SUM

The following example calculates the sum of employees net salary from all records of the Salary table.

SELECT sum(NetPay) from Salary;
  
   Sum(NetPay) 
----------------- 
     329000
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