For further qualification of queries, you can perform pattern matching with wild card characters. Wild card characters are symbols that represent unspecified character values.

In QBF, the asterisk (*) and the question mark (?) are the default wild card characters. Pattern-matching characters cannot be used in fields with numeric data types.

As explained in The % and _ Pattern Matching Characters, you can specify that your system use the % and _ character in place of ? and *.