数字转换成大写金额

在 SQL 中将数字转换成大写金额可以通过自定义函数来实现。以下是一个示例: ```sql CREATE FUNCTION dbo.NumToCny (@Num DECIMAL(18,2)) RETURNS VARCHAR(1024) AS BEGIN -- 数字对应的大写汉字 DECLARE @CnyTable TABLE (Num INT, Cny VARCHAR(16)) INSERT INTO @CnyTable (Num, Cny) VALUES (0, '零'), (1, '壹'), (2, '贰'), (3, '叁'), (4, '肆'), (5, '伍'), (6, '陆'), (7, '柒'), (8, '捌'), (9, '玖') -- 金额单位对应的汉字 DECLARE @UnitTable TABLE (Unit INT, Cny VARCHAR(8)) INSERT INTO @UnitTable (Unit, Cny) VALUES (0, ''), (1, '拾'), (2, '佰'), (3, '仟'), (4, '万'), (5, '拾'), (6, '佰'), (7, '仟'), (8, '亿'), (9, '拾'), (10, '佰'), (11, '仟') DECLARE @Cny VARCHAR(1024) = '' DECLARE @IntPart BIGINT = CAST(@Num AS BIGINT) DECLARE @DecPart DECIMAL(18,2) = @Num - @IntPart IF @IntPart = 0 SET @Cny = '零元' ELSE BEGIN -- 整数部分转换 DECLARE @IntCny VARCHAR(1024) = '' DECLARE @Unit INT = 0 WHILE @IntPart > 0 BEGIN DECLARE @Num INT = @IntPart % 10 DECLARE @UnitCny VARCHAR(8) = (SELECT Cny FROM @UnitTable WHERE Unit = @Unit) DECLARE @NumCny VARCHAR(16) = (SELECT Cny FROM @CnyTable WHERE Num = @Num) IF @Num = 0 AND (@Unit = 4 OR @Unit = 8) SET @IntCny = @NumCny + @UnitCny + @IntCny ELSE SET @IntCny = @NumCny + @UnitCny + @IntCny SET @IntPart = @IntPart / 10 SET @Unit = @Unit + 1 END SET @Cny = @IntCny + '元' END -- 小数部分转换 IF @DecPart > 0 BEGIN DECLARE @DecCny VARCHAR(1024) = '' DECLARE @DecString VARCHAR(18) = REPLACE(CAST(@DecPart AS VARCHAR(18)), '0.', '') DECLARE @Len INT = LEN(@DecString) DECLARE @i INT = 1 WHILE @i <= @Len BEGIN DECLARE @Num INT = CAST(SUBSTRING(@DecString, @i, 1) AS INT) DECLARE @NumCny VARCHAR(16) = (SELECT Cny FROM @CnyTable WHERE Num = @Num) DECLARE @UnitCny VARCHAR(8) = (SELECT Cny FROM @UnitTable WHERE Unit = -@i) SET @DecCny = @DecCny + @NumCny + @UnitCny SET @i = @i + 1 END SET @Cny = @Cny + @DecCny + '分' END RETURN @Cny END ``` 使用方法: ```sql SELECT dbo.NumToCny(1234567.89) AS CnyAmount -- 输出:壹佰贰拾叁万肆仟伍佰陆拾柒元捌角玖分 ```
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