SQL Server Books Online上面搜索like,找到了包含%，_,[],[^]几个通配符。
如：select * from mybbs where Content like '[w]%'
like关键字用于搜索匹配某个模式的字符串，或者日期，时间值。
SQL Server Books中的部分解释如下：
Pattern Matching in Search Conditions
The LIKE keyword uses a regular expression to contain the pattern that the ＆#118alues are matched against. The pattern contains the character string to search for, which can contain any combination of four wildcards.
Wildcard
Meaning
%
Any string of zero or more characters.
_
Any single character.
[ ]
Any single character within the specified range (for example, [a-f]) or set (for example, [abcdef]).
[^]
Any single character not within the specified range (for example, [^a - f]) or set (for example, [^abcdef]).
Enclose the wildcard(s) and the character string in single quotation marks, for example:
LIKE '%en%' searches for all strings that contain the letters en anywhere in the string (Bennet, Green, McBadden).
LIKE '_heryl' searches for all six-letter names ending with the letters heryl (Cheryl, Sheryl).
LIKE '[CK]ars[eo]n' searches for Carsen, Karsen, Carson, and Karson (Carson).
LIKE '[M-Z]inger' searches for all names ending with the letters inger that begin with any single letter from M through Z (Ringer).
LIKE 'M[^c]%' searches for all names beginning with the letter M that do not have the letter c as the second letter (MacFeather).
This query finds all phone numbers in the authors table that have area code 415:
SELECT phone
FROM pubs.dbo.authors
WHERE phone LIKE '415%'
