zblog A到Z索引查询
mysql A~Z 查询函数:
DROP FUNCTION IF EXISTS `fristPinyin`; DELIMITER ;; CREATE FUNCTION `fristPinyin`(P_NAME VARCHAR(255)) RETURNS varchar(255) CHARSET utf8 DETERMINISTIC BEGIN DECLARE V_RETURN VARCHAR(255); DECLARE V_BOOL INT DEFAULT 0; DECLARE FIRST_VARCHAR VARCHAR(1); SET FIRST_VARCHAR = left(CONVERT(P_NAME USING gbk),1); SELECT FIRST_VARCHAR REGEXP '[a-zA-Z]' INTO V_BOOL; IF V_BOOL = 1 THEN SET V_RETURN = FIRST_VARCHAR; ELSE 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'); END IF; RETURN V_RETURN; END ;;
select * from zbp_tag where fristPinyin(tag_Name) like 'a%'