How To Fix DDLS327 - select * cannot be combined with 'having'

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 327

• Message text: select * cannot be combined with 'having'

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS327 - select * cannot be combined with 'having' ?

  The SAP error message DDLS327, which states "SELECT  cannot be combined with 'HAVING'", typically occurs in ABAP when you are trying to execute a SQL query that uses the `SELECT statement in conjunction with aHAVINGclause. This is not allowed in SQL because theHAVINGclause is meant to filter results after aggregation, and usingSELECT *` does not provide a clear context for which fields are being aggregated.
  Cause:
  The error arises from the following reasons:
  
  *Use of `SELECT **: TheSELECT *statement retrieves all columns from the specified table(s), but when you useHAVING, it implies that you are working with aggregated data (e.g., usingGROUP BY`).
  SQL Syntax Rules: SQL syntax rules dictate that when using HAVING, you must specify the columns explicitly rather than using SELECT *.
  
  Solution:
  To resolve this error, you should modify your SQL query to explicitly specify the columns you want to select, rather than using SELECT *. Here’s how you can do it:
  
  Identify the Columns: Determine which columns you need from the table.
  Use Explicit Column Names: Replace SELECT * with the specific column names you want to retrieve.
  
  Example:
  Instead of writing:
  SELECT * FROM your_table
  GROUP BY some_column
  HAVING COUNT(*) > 1;
  You should write:
  SELECT column1, column2, ..., some_column
  FROM your_table
  GROUP BY some_column
  HAVING COUNT(*) > 1;
  Related Information:
  
  SQL Aggregation: The HAVING clause is used to filter records that work on summarized group data. It is often used with aggregate functions like COUNT(), SUM(), AVG(), etc.
  GROUP BY Clause: When using HAVING, you typically also use a GROUP BY clause to define how the data should be grouped before applying the aggregate functions.
  Performance Considerations: Specifying only the necessary columns can improve performance, as it reduces the amount of data being processed and transferred.
  
  By following these guidelines, you should be able to resolve the DDLS327 error and successfully execute your SQL query in SAP.