1. The relative order of rows that do not have different sort keys is not retained when they are sorted.
For example, internal table contains 3 columns <col1> <col2> <col3>, sorted by <col1> <col2> ASCENDING：
If you sort it by <col1> <col2> ASCENDING again, the data are still in the correct order but the position of the rows with same sort keys may changes :
The problem could happen randomly. And you may observe that the problem only happen in one system but not in another system, even there is no difference with data/kernel/package.eg.
2. You are using SORT command without AS TEXT option, the sort order of text/character(CHAR/STRING) fields is unexpect(not in accord with your country rules).
The problem happens when the text/character fields contain non-numeric contents, like national characters(Chinese/Japanese...) or punctuation marks, blank characters, special technical characters.eg
3. You are using SORT command with AS TEXT option to sort text/character fields but the sort order is still unexpect.
select, unexpect sort order, data sequence, sort stable, sort internal table, sort as text, national special characters, stable sorting, Chinese, Japanese, , KBA , BC-ABA-LA , ABAP Syntax, Compiler, Runtime , BC-I18 , Internationalization (I18N) , Problem
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