How To Fix DDLS395 - Problematic alias or column name & in union & is not the same as name &

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 395

• Message text: Problematic alias or column name & in union & is not the same as name &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS395 - Problematic alias or column name & in union & is not the same as name & ?

  The SAP error message DDLS395 indicates that there is a problem with the alias or column name in a SQL UNION operation. Specifically, it means that the column names or aliases in the SELECT statements of the UNION do not match, which is a requirement for UNION operations in SQL.
  Cause:
  The error occurs when:
  
  The column names or aliases in the SELECT statements of the UNION do not match in terms of name or data type.
  There is a discrepancy in the number of columns being selected in each part of the UNION.
  The columns being selected have different data types, which can lead to issues when trying to combine the results.
  
  Solution:
  To resolve the DDLS395 error, you can take the following steps:
  
  
  Check Column Names: Ensure that the column names or aliases in each SELECT statement of the UNION are identical. For example:
  SELECT column1 AS alias1, column2 AS alias2 FROM table1
  UNION
  SELECT column1 AS alias1, column2 AS alias2 FROM table2
  
  
  Check Number of Columns: Make sure that both SELECT statements return the same number of columns. If one SELECT returns three columns and the other returns two, you will encounter this error.
  
  
  Check Data Types: Ensure that the data types of the corresponding columns in each SELECT statement are compatible. If one column is an integer and the other is a string, you may need to cast one of them to match the other.
  
  
  Use Aliases Consistently: If you are using aliases, make sure they are consistently applied across all SELECT statements in the UNION.
  
  
  Review SQL Syntax: Double-check the overall SQL syntax to ensure there are no other issues that might be causing the error.
  
  
  Related Information:
  
  UNION vs. UNION ALL: Remember that UNION removes duplicate records, while UNION ALL includes all records. The same rules about matching column names and data types apply to both.
  Debugging: If you are unsure where the mismatch is occurring, you can run each SELECT statement separately to verify their outputs before combining them with UNION.
  Documentation: Refer to the SAP documentation or SQL reference guides for more details on the requirements for UNION operations.
  
  By following these steps, you should be able to resolve the DDLS395 error and successfully execute your SQL UNION operation.