Wildcard characters recognized by SQL Server for use in regular expressions.
Wildcard Searches for
% Any string of zero or more characters.
_ Any single character.
[ ] Any single character within the specified range (for example, [a-f]) or the specified set (for example, [abcdef]).
[^] Any single character not within the specified range (for example, [^a-f]) or the specified set (for example, [^abcdef]).
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