oracle within group

在Oracle数据库中，WITHIN GROUP是一个用于合并多行数据为一行的功能。它通常与LISTAGG函数一起使用，可以将一个列中的多个值按照指定的顺序进行合并，并以指定的分隔符进行分隔。使用WITHIN GROUP子句，可以对多行数据进行排序，并在合并时保持指定的排序顺序。这在需要将多行数据合并为一行，并按照特定顺序显示的场景下非常有用。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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