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                >[info] 核心要點:匹配 % 表示任意數量的任意字符(其中包括0個) _ 表示任意單個字符 ![](https://img.kancloud.cn/12/00/1200841bcb7cb603115ce2e8753623a2_367x459.png =300x) 多個關鍵詞的搜索,多個關鍵詞可以以 空格或逗號隔開 ``` 1,查詢用戶名以某個字符開頭的用戶 select * from where username like 'a%'; ------ 注意,默認情況下不區分大小寫 select * from where username REGEXP '^a'; 2,查詢用戶名以某個字符結尾的用戶 select * from where username like '%a'; 3,查詢用戶名包含某個字符的用戶 select * from where username like '%a%'; 4,查詢用戶名長度為3的用戶 select * from where username like '___'; select * from where username REGEXP '^...$'; 5,查詢用戶名第二個字符為o的用戶 select * from where username like '_o%'; 讓查詢的結果中高亮搜索的關鍵詞 $row['username'] = str_replace( $keywords , '<font color="red"'.$keywords.'</font>',$row['username'] ) ; ``` fulltext全文索引 1. mysql使用全文搜索功能,數據表引擎必須是MyISAM 2. mysql全文搜索功能不支持中文,可將中文特殊處理
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