DDLS392 - Select lists with unions must have the same name or else insert aliases

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 392

• Message text: Select lists with unions must have the same name or else insert aliases

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS392 - Select lists with unions must have the same name or else insert aliases ?

  The SAP error message DDLS392 indicates that there is an issue with the SQL SELECT statement in your ABAP program or database view definition. Specifically, this error occurs when you are using a UNION operation in your SQL query, and the columns in the SELECT lists of the combined queries do not have the same names or are not properly aliased.
  Cause:
  When using a UNION in SQL, the following rules must be adhered to:
  
  The number of columns in each SELECT statement must be the same.
  The data types of the corresponding columns must be compatible.
  The column names in the result set must either be the same or must be explicitly aliased.
  
  If the column names differ between the SELECT statements, you will encounter the DDLS392 error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Ensure Column Names Match: Make sure that the columns in each SELECT statement of the UNION have the same names. For example:
  SELECT column1 AS name, column2 AS age FROM table1
  UNION
  SELECT column1 AS name, column2 AS age FROM table2
  
  
  Use Aliases: If the columns have different names but represent the same data, you can use aliases to standardize the names across the SELECT statements. For example:
  SELECT column1 AS common_name, column2 AS common_age FROM table1
  UNION
  SELECT columnA AS common_name, columnB AS common_age FROM table2
  
  
  Check Data Types: Ensure that the data types of the corresponding columns in each SELECT statement are compatible. If necessary, you can cast the columns to the same data type.
  
  
  Review the SQL Query: If you are working with a complex query, review the entire SQL statement to ensure that all parts conform to the requirements of a UNION operation.
  
  
  Related Information:
  
  UNION vs. UNION ALL: Remember that UNION removes duplicate records, while UNION ALL includes all records, including duplicates. The same naming rules apply to both.
  Debugging: If you are unsure where the error is occurring, you can break down the query into individual SELECT statements and run them separately to identify the source of the issue.
  Documentation: Refer to the SAP documentation or SQL reference guides for more details on SQL syntax and best practices.
  
  By following these guidelines, you should be able to resolve the DDLS392 error and successfully execute your SQL query.