https://blog.youkuaiyun.com/Dean_a_lonezh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/Dean_a_lone/article/details/87695535https://blog.youkuaiyun.com/Dean_a_lone/article/details/87695535Dean_a_loneTue, 19 Feb 2019 11:49:07 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/80423736https://blog.youkuaiyun.com/Dean_a_lone/article/details/80423736Dean_a_loneWed, 23 May 2018 18:59:37 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/78558477https://blog.youkuaiyun.com/Dean_a_lone/article/details/78558477Dean_a_loneFri, 17 Nov 2017 10:40:30 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/78520413https://blog.youkuaiyun.com/Dean_a_lone/article/details/78520413Dean_a_loneMon, 13 Nov 2017 14:55:37 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/78518722https://blog.youkuaiyun.com/Dean_a_lone/article/details/78518722Dean_a_loneMon, 13 Nov 2017 11:39:20 +0800'80';运行后发现：]]>https://blog.youkuaiyun.com/Dean_a_lone/article/details/78468900https://blog.youkuaiyun.com/Dean_a_lone/article/details/78468900Dean_a_loneTue, 07 Nov 2017 16:02:19 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/73997795https://blog.youkuaiyun.com/Dean_a_lone/article/details/73997795Dean_a_loneFri, 30 Jun 2017 14:52:04 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/72846005https://blog.youkuaiyun.com/Dean_a_lone/article/details/72846005Dean_a_loneFri, 02 Jun 2017 17:00:25 +0800LENGTH(str): 求字符串长度（以字节为单位）,返回字符串str的字节长度。 注：在GBK编码中，一个中文字符为2个字节。UTF-8编码中，一个中文字符为3个字节，一个英文字符为1个字节。 例：*SELECT LENGTH('玩s')* 返回结果为4。<2>CHAR_LENGTH(str): 获取字符串的长度，单位为字符。 例：*SELECT CHAR_L]]>https://blog.youkuaiyun.com/Dean_a_lone/article/details/72844161https://blog.youkuaiyun.com/Dean_a_lone/article/details/72844161Dean_a_loneFri, 02 Jun 2017 14:38:27 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/72833413https://blog.youkuaiyun.com/Dean_a_lone/article/details/72833413Dean_a_loneThu, 01 Jun 2017 17:27:42 +0800https://blog.youkuaiyun.com/Dean_a_lone/article/details/72782658https://blog.youkuaiyun.com/Dean_a_lone/article/details/72782658Dean_a_loneSat, 27 May 2017 16:35:13 +0800