一、函数
这里是通过函数调用进行获取汉字的拼音首字母。
DELIMITER $$ CREATE FUNCTION `pinyin`(P_NAME VARCHAR(255)) RETURNS varchar(255) CHARSET utf8 DETERMINISTIC BEGIN DECLARE V_COMPARE VARCHAR(255); DECLARE V_RETURN VARCHAR(255); DECLARE I INT; SET I = 1; SET V_RETURN = ''; #循环截取字符 while I < LENGTH(P_NAME) do SET V_COMPARE = SUBSTR(P_NAME, I, 1); IF (V_COMPARE != '') THEN #字符串拼接 SET V_RETURN = CONCAT(V_RETURN, to_frist_pinyin(V_COMPARE)); END IF; SET I = I + 1; end while; IF (ISNULL(V_RETURN) or V_RETURN = '') THEN SET V_RETURN = P_NAME; END IF; RETURN V_RETURN; END$$ CREATE FUNCTION `to_frist_pinyin`(P_NAME VARCHAR(255)) RETURNS varchar(255) CHARSET utf8 BEGIN DECLARE V_RETURN VARCHAR(255); DECLARE V_FIRST_CHAR VARCHAR(255); #这块主要意思是假如传入的是英文串的话,只取首字母 set V_FIRST_CHAR =UPPER(LEFT(CONVERT(P_NAME USING gbk),1)); set V_RETURN = V_FIRST_CHAR; #如果是这些特殊符号,直接返回# IF V_FIRST_CHAR in ('(',')','《','》') THEN SET V_RETURN = ''; #两个不相等只有一个情况,V_FIRST_CHAR是中文汉字或者中文符号。 elseif LENGTH( V_FIRST_CHAR) <> CHARACTER_LENGTH( V_FIRST_CHAR ) then SET V_RETURN = ELT(INTERVAL(CONV(HEX(left(CONVERT(P_NAME USING gbk),1)),16,10), 0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7, 0xBFA6,0xC0AC,0xC2E8,0xC4C3,0xC5B6,0xC5BE,0xC6DA,0xC8BB, 0xC8F6,0xCBFA,0xCDDA,0xCEF4,0xD1B9,0xD4D1), 'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z'); #如果是下面的直接原样输出 elseif V_FIRST_CHAR in ('A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z', '1','2','3','4','5','6','7','8','9','0','*','+','-','=','/','\\','{','}','[',']','(',')','(',')') then SET V_RETURN = V_RETURN; #其他的输出# else SET V_RETURN = '#'; END IF; #为空的话输出# RETURN IFNULL(V_RETURN,'#'); END$$ DELIMITER ;
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<iframe></iframe> 标签:SET,RETURN,拼音,NAME,CHAR,首字母,MySQL,255,FIRST From: https://www.cnblogs.com/ios9/p/16600472.html