How To Fix DDLS396 - Select with aggregate functions requires a group by clause

DDLS396 - Overview

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 396

• Message text: Select with aggregate functions requires a group by clause

Self-Explanatory Message

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DDLS396 - Details

• The SAP error message DDLS396 indicates that there is an issue with a SQL query that uses aggregate functions without a corresponding GROUP BY clause. This error typically occurs when you are trying to retrieve data that involves aggregation (like SUM, COUNT, AVG, etc.) but have not specified how to group the results.
  
  Cause:
  The error arises when:
  
  You are using aggregate functions in your SELECT statement.
  You have not included a GROUP BY clause to specify how the results should be grouped.
  
  For example, the following SQL query would trigger this error:
  SELECT department, COUNT(employee_id)
  FROM employees
  WHERE status = 'active';
  In this case, since COUNT(employee_id) is an aggregate function, you need to specify how to group the results, such as by department.
  
  Solution:
  To resolve this error, you need to add a GROUP BY clause to your SQL query. Here’s how you can modify the previous example:
  SELECT department, COUNT(employee_id)
  FROM employees
  WHERE status = 'active'
  GROUP BY department;
  
  Related Information:
  
  
  Aggregate Functions: These functions