How To Fix DDLS144 - Aggregate function & requires an alias for the column

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 144

• Message text: Aggregate function & requires an alias for the column

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS144 - Aggregate function & requires an alias for the column ?

  The SAP error message DDLS144 indicates that an aggregate function in your SQL query requires an alias for the column. This typically occurs when you are using an aggregate function (like SUM, COUNT, AVG, etc.) in a SELECT statement without providing an alias for the resulting column.
  Cause:
  When you use an aggregate function in a SQL query, the result of that function needs to be given a name (alias) so that it can be referenced in the output. The SQL standard requires that any column resulting from an aggregate function must have an alias to avoid ambiguity.
  Example of the Error:
  SELECT SUM(sales) FROM sales_data;
  This will trigger the DDLS144 error because the result of SUM(sales) does not have an alias.
  Solution:
  To resolve this error, you need to provide an alias for the column that results from the aggregate function. You can do this by using the AS keyword followed by the alias name.
  Corrected Example:
  SELECT SUM(sales) AS total_sales FROM sales_data;
  In this corrected query, total_sales is the alias for the result of the SUM(sales) function.
  Related Information:
  
  Aggregate Functions: These are functions that perform a calculation on a set of values and return a single value. Common aggregate functions include SUM, COUNT, AVG, MIN, and MAX.
  Aliases: An alias is a temporary name that you can give to a table or a column for the duration of a query. It is useful for improving the readability of your SQL queries.
  SQL Standards: Following SQL standards and best practices helps in writing clear and maintainable code, and it can prevent errors like DDLS144.
  
  Additional Tips:
  
  Always use meaningful aliases that describe the data they represent.
  If you are using multiple aggregate functions in a single query, ensure that each one has a unique alias to avoid confusion.
  If you are working with GROUP BY clauses, remember that all non-aggregated columns in the SELECT statement must be included in the GROUP BY clause.
  
  By following these guidelines, you can avoid the DDLS144 error and write more effective SQL queries in SAP.