In SQL, wildcard characters are used with the SQL LIKE operator.
SQL wildcards are used to search for data within a table.
With SQL, the wildcards are:
Wildcard
%, -->A substitute for zero or more
characters
_, --->A substitute for a single character
[charlist], -->Sets and ranges of characters to
match
[^charlist] or [!charlist], -->Matches only a character NOT
specified within the brackets
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