How To Fix SDDL_PARSER_MSG059 - This expression is not contained in the GROUP BY list

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 059

• Message text: This expression 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 SDDL_PARSER_MSG059 - This expression is not contained in the GROUP BY list ?

  The SAP error message SDDL_PARSER_MSG059 indicates that there is an issue with a SQL query, specifically related to the GROUP BY clause. This error typically occurs when an expression in the SELECT statement is not included in the GROUP BY clause, which is a requirement in SQL when using aggregate functions.
  Cause:
  The error arises when:
  
  You are trying to select columns or expressions that are not aggregated (e.g., using functions like SUM(), COUNT(), etc.) and are not included in the GROUP BY clause.
  The SQL standard requires that all selected columns that are not part of an aggregate function must be included in the GROUP BY clause.
  
  Example:
  Consider the following SQL query:
  SELECT department, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  If you try to add another column, such as employee_name, without including it in the GROUP BY clause, you will encounter this error:
  SELECT department, employee_name, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  In this case, employee_name is not part of an aggregate function and is not included in the GROUP BY clause, leading to the error.
  Solution:
  To resolve this error, you need to ensure that:
  
  All non-aggregated columns in the SELECT statement are included in the GROUP BY clause.
  Alternatively, if you only need aggregated data, you can remove the non-aggregated columns from the SELECT statement.
  
  Corrected Example:
  To fix the previous example, you can either:
  
  Include employee_name in the GROUP BY clause:
  SELECT department, employee_name, COUNT(employee_id)
  FROM employees
  GROUP BY department, employee_name;
  
  Remove employee_name from the SELECT statement if it is not needed:
  SELECT department, COUNT(employee_id)
  FROM employees
  GROUP BY department;
  
  
  Related Information:
  
  SQL Aggregate Functions: Functions like SUM(), AVG(), COUNT(), etc., that perform a calculation on a set of values and return a single value.
  GROUP BY Clause: Used in collaboration with aggregate functions to group the result set by one or more columns.
  SQL Standards: Familiarity with SQL standards can help in understanding the requirements for GROUP BY and aggregate functions.
  
  By ensuring that your SQL queries adhere to these principles, you can avoid the SDDL_PARSER_MSG059 error and successfully execute your queries.