You analyze ABAP code with an ABAP SQL SELECT. What do you look at to find out in which sequence the joins are evaluated when nested joins are present?

In the context of evaluating the sequence of joins in an ABAP SQL SELECT statement, the sequence of ON conditions is crucial. The ON condition defines the relationship between two tables being joined, specifying how the data from both tables should be matched together. In a nested join situation, understanding the order in which these ON conditions appear helps to determine how the joins are processed by the database engine.

When multiple joins are present, the evaluation of these ON conditions influences the resulting dataset significantly. For instance, if one ON condition filters out a significant amount of data from one table before another join is applied, it can affect performance and the final output. Therefore, focusing on the sequence of ON conditions gives insight into how the joins are executed, revealing the logical structure of the query and the order in which the database will retrieve and combine the data from the various tables involved.

The other choices do not directly address the key aspect of join evaluation. The sequence of data sources, selected fields, or selection criteria can certainly impact various aspects of a data query, but they do not specifically dictate the order of join execution in a nested join scenario as the ON conditions do.