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ABAP Keyword Documentation → ABAP − Reference → Program Flow Logic → Expressions and Functions for Conditions → log_exp - Logical Expressions → rel_exp - Relational Expressions → rel_exp - Comparison Rules →rel_exp - Comparing Internal Tables
It is possible to compare internal tables with other internal tables if their row types are can be compared. Internal tables are compared based on the following hierarchy:
Note
If an internal table with a header line is specified as an operand of an assignment, the header line is addressed in nearly all operand positions and not the table body. To address the table body of a table with a header, [] must be appended to the name.