How To Fix DDLS351 - Column &.& is not contained in the GROUP BY list

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 351

• Message text: Column &.& is not contained in the GROUP BY list

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS351 - Column &.& is not contained in the GROUP BY list ?

  The SAP error message DDLS351 indicates that there is an issue with a SQL query, specifically related to the use of the GROUP BY clause. This error occurs when a column that is being selected in the query is not included in the GROUP BY clause, which is required for aggregate functions in SQL.
  Cause:
  The error arises when:
  
  You are using an aggregate function (like SUM, COUNT, AVG, etc.) in your SQL query.
  You are selecting columns that are not part of the aggregate functions.
  The non-aggregated columns must be included in the GROUP BY clause to ensure that the SQL engine knows how to group the results.
  
  Example:
  Consider the following SQL query:
  SELECT department, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  If you try to add another column that is not aggregated and not included in the GROUP BY, like this:
  SELECT department, employee_name, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  You will receive the DDLS351 error because employee_name is not included in the GROUP BY clause.
  Solution:
  To resolve the error, you need to ensure that all non-aggregated columns in your SELECT statement are included in the GROUP BY clause. Here are a few approaches:
  
  
  Add the Column to the GROUP BY Clause:
  If you want to include the non-aggregated column in the result set, add it to the GROUP BY clause:
  SELECT department, employee_name, COUNT(employee_id)
  FROM employees
  GROUP BY department, employee_name;
  
  
  Use Aggregate Functions:
  If you do not need the non-aggregated column, you can apply an aggregate function to it:
  SELECT department, MAX(employee_name), COUNT(employee_id)
  FROM employees
  GROUP BY department;
  
  
  Remove Non-Aggregated Columns:
  If the non-aggregated column is not necessary for your results, simply remove it from the SELECT statement:
  SELECT department, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  
  
  Related Information:
  
  SQL Standards: The requirement for non-aggregated columns to be included in the GROUP BY clause is part of SQL standards to ensure that the results are logically grouped.
  Debugging: When encountering this error, review your SQL query to identify which columns are causing the issue and adjust accordingly.
  SAP Documentation: For more detailed information, refer to SAP's documentation on SQL queries and the use of aggregate functions.
  
  By following these guidelines, you should be able to resolve the DDLS351 error and successfully execute your SQL query.