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lang-sql
<or&. See @BenHinman's comment.FOR XML PATH (''). That means it should not be considered reliable as any patch or update could alter how this functions. It's basically relying on a deprecated feature.FOR XMLis intended to generate XML, not concatenate arbitrary strings. That's why it escapes&,<and>to XML entity codes (&,<,>). I assume it also will escape"and'to"and'in attributes as well. It's notGROUP_CONCAT(),string_agg(),array_agg(),listagg(), etc. even if you can kind of make it do that. We should be spending our time demanding Microsoft implement a proper function.string_aggin v.Next. and all of this can go away.