MySQL轉(zhuǎn)換人民幣大小寫
在MySQL中，我們經(jīng)常需要將數(shù)字轉(zhuǎn)換為中文大寫形式，尤其是轉(zhuǎn)換人民幣金額。本文將介紹如何在MySQL中實現(xiàn)這個功能。
使用自定義函數(shù)實現(xiàn)轉(zhuǎn)換
我們可以創(chuàng)建一個MySQL自定義函數(shù)，用于將數(shù)字轉(zhuǎn)換為中文大寫形式。以下是一個簡單的示例：
DELIMITER $$
CREATE FUNCTION rmb_upper(amount DECIMAL(13,2)) RETURNS VARCHAR(255)
DETERMINISTIC
BEGIN
DECLARE num CHAR(13);
DECLARE result VARCHAR(255);
DECLARE tempnum VARCHAR(10);
DECLARE i TINYINT;
DECLARE units TINYINT;
SET num = TRIM(ROUND(amount, 2));
SET i = LENGTH(num);
SET result = '';
SET units = 0;
IF num = '0.00' THEN
RETURN '零元整';
END IF;
IF SUBSTRING(num, 1, 1) = '-' THEN
SET result = '負';
SET num = SUBSTRING(num, 2);
SET i = LENGTH(num);
END IF;
IF num LIKE '%.%' THEN
SET result = CONCAT(result, '人民幣');
SET num = FLOOR(num * 100);
ELSE
SET result = CONCAT(result, '人民幣');
SET num = FLOOR(num * 100);
END IF;
WHILE(i >0) DO
SET units = units + 1;
SET tempnum = SUBSTRING(num, i, 1);
IF tempnum<>'0' THEN
SET result = CONCAT(CASE units
WHEN 1 THEN '分'
WHEN 2 THEN '角'
WHEN 3 THEN '元'
WHEN 4 THEN '拾'
WHEN 5 THEN '佰'
WHEN 6 THEN '仟'
WHEN 7 THEN '萬'
WHEN 8 THEN '拾'
WHEN 9 THEN '佰'
WHEN 10 THEN '仟'
WHEN 11 THEN '億'
END, result);
SET result = CONCAT(CASE tempnum
WHEN '0' THEN '零'
WHEN '1' THEN '壹'
WHEN '2' THEN '貳'
WHEN '3' THEN '叁'
WHEN '4' THEN '肆'
WHEN '5' THEN '伍'
WHEN '6' THEN '陸'
WHEN '7' THEN '柒'
WHEN '8' THEN '捌'
WHEN '9' THEN '玖'
END, result);
ELSE
IF (units = 3 OR units = 7 OR units = 11) AND i = 5 THEN
SET result = CONCAT('零', result);
ELSEIF UNITS = 3 AND i<>1 AND LENGTH(num) >7 THEN
SET result = CONCAT('元', result);
END IF;
END IF;
IF units = 12 THEN
SET i = 0;
END IF;
SET i = i - 1;
END WHILE;
IF SUBSTRING(result, 1, 1) = '零' THEN
SET result = SUBSTRING(result, 2);
END IF;
RETURN CONCAT(result, '整');
END $$
DELIMITER ;SELECT rmb_upper(12.34);
-- 結(jié)果：人民幣壹拾貳元叁角肆分整使用內(nèi)置函數(shù)實現(xiàn)轉(zhuǎn)換
在MySQL 8.0及以上版本中，可以使用內(nèi)置函數(shù)FORMAT()來實現(xiàn)數(shù)字轉(zhuǎn)換為人民幣大寫形式。以下是一個簡單示例：
SELECT FORMAT(12.34, 2, 'zh_CN');
-- 結(jié)果：壹拾貳元叁角肆分