What are aggregate tables? How do you design them using Teradata?

An aggregate table is those tables which contain the summary of the existing warehouse. It is used to save the time as retrieving data from a million of records in the actual table will take too much time. So, aggregate the tables to a certain level of dimensions and use them.

Teradata supports some aggregate functions which are:

• COUNT: It is used to count the rows.
• SUM: used to calculate the sum of specified columns.
• MIN: To find the minimum value from specified columns.
• MAX: to find the maximum value from specified columns
• AVG: to calculate the average of specified columns.