Linux date命令的用法

DROP FUNCTION IF EXISTS `GET_FIRST_PINYIN_CHAR`;DELIMITER $$CREATE FUNCTION `GET_FIRST_PINYIN_CHAR`(PARAM VARCHAR(255)) RETURNS VARCHAR(2) CHARSET utf8BEGINDECLARE V_RETURN VARCHAR(255);DECLARE V_FIRST_CHAR VARCHAR(2);SET V_FIRST_CHAR = UPPER(LEFT(PARAM,1));SET V_RETURN = V_FIRST_CHAR;IF LENGTH( V_FIRST_CHAR) <> CHARACTER_LENGTH( V_FIRST_CHAR ) THENSET V_RETURN = ELT(INTERVAL(CONV(HEX(LEFT(CONVERT(PARAM USING gbk),1)),16,10),0xB0A1,0xB0C5,0xB2C1,0xB4EE,0xB6EA,0xB7A2,0xB8C1,0xB9FE,0xBBF7,0xBFA6,0xC0AC,0xC2E8,0xC4C3,0xC5B6,0xC5BE,0xC6DA,0xC8BB,0xC8F6,0xCBFA,0xCDDA,0xCEF4,0xD1B9,0xD4D1),'A','B','C','D','E','F','G','H','J','K','L','M','N','O','P','Q','R','S','T','W','X','Y','Z');END IF;RETURN V_RETURN;END$$DELIMITER ;