搜索功能使用说明 A pattern can include regular characters and wildcard characters. During pattern matching, regular characters must exactly match the characters specified in the character string; wildcard characters, however, can be matched with arbitrary fragments of the character string. Wildcards: % Any string of zero or more characters. _ (underscore) Any single character. [ ] Any single character within the specified range ([a-f]) or set ([abcdef]). [^] Any single character not within the specified range ([^a-f]) or set ([^abcdef]).