How To Fix ADT_DATAPREVIEW_MSG005 - Only one SELECT statement is allowed.

SAP Error Message - Details

• Message type: E = Error

• Message class: ADT_DATAPREVIEW_MSG - Messsage Class for data preview

• Message number: 005

• Message text: Only one SELECT statement is allowed.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ADT_DATAPREVIEW_MSG005 - Only one SELECT statement is allowed. ?

  The SAP error message ADT_DATAPREVIEW_MSG005 indicates that there is an issue with the SQL query you are trying to execute in the ABAP Development Tools (ADT) or within the SAP environment. Specifically, this error occurs when the SQL query contains more than one SELECT statement, which is not allowed in certain contexts.
  Cause:
  The primary cause of this error is that the SQL query you are attempting to run includes multiple SELECT statements. In many cases, especially when using tools like ADT, only a single SELECT statement is permitted for data preview or execution.
  Solution:
  To resolve this error, you should ensure that your SQL query contains only one SELECT statement. Here are some steps you can take:
  
  
  Review Your Query: Check the SQL code for any additional SELECT statements. If you find multiple SELECT statements, you will need to modify your query.
  
  
  Combine Queries: If you need to retrieve data from multiple tables, consider using JOIN operations to combine the data into a single SELECT statement.
  Example:
  SELECT a.field1, b.field2
  FROM table1 AS a
  JOIN table2 AS b ON a.id = b.id
  WHERE a.condition = 'value';
  
  
  Use Subqueries: If necessary, you can use subqueries to achieve the desired results within a single SELECT statement.
  Example:
  SELECT field1
  FROM table1
  WHERE id IN (SELECT id FROM table2 WHERE condition = 'value');
  
  
  Test the Query: After making the necessary changes, test the query again in the ADT or the relevant SAP environment to ensure that it executes without errors.
  
  
  Related Information:
  
  SQL Syntax: Familiarize yourself with SQL syntax and best practices for writing efficient queries.
  ABAP Development Tools (ADT): Understand the limitations and features of ADT, especially regarding SQL execution.
  Performance Considerations: When combining queries or using subqueries, consider the performance implications and optimize your SQL as needed.
  
  By following these steps, you should be able to resolve the error and successfully execute your SQL query in the SAP environment.