Sure! Below is the SEO-friendly HTML answer for the interview question on the difference between SELECT SINGLE and SELECT UP TO 1 ROWS in SAP ABAP:

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Explaining the Difference between SELECT SINGLE and SELECT UP TO 1 ROWS in SAP ABAP

SELECT SINGLE is used to retrieve a single record from the database table based on the key fields specified in the WHERE condition. If more than one record is found, it raises a runtime error.

On the other hand, SELECT UP TO 1 ROWS is used to fetch at most one record from the database table meeting the selection criteria. It doesn't raise a runtime error even if multiple records match the condition but only returns the first record found.

When deciding between SELECT SINGLE and SELECT UP TO 1 ROWS, consider the possibility of multiple records meeting the criteria and the action to take in such cases. Use SELECT SINGLE when expecting only one record and handling an error if multiple records are found. Use SELECT UP TO 1 ROWS when simply retrieving the first match without error handling for multiple matches.

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