我不得不再次在互联网上搜索此代码,所以我想我会把它放在这里,所以我可以在下次更快地找到它并希望你发现它也快一点了:)
答案 0 :(得分:1)
CREATE FUNCTION [dbo].[fn_EAN13CheckDigit] (@Barcode nvarchar(12))
RETURNS nvarchar(13)
AS
BEGIN
DECLARE @SUM int , @COUNTER int, @RETURN varchar(13), @Val1 int, @Val2 int
SET @COUNTER = 1 SET @SUM = 0
WHILE @Counter < 13
BEGIN
SET @VAL1 = SUBSTRING(@Barcode,@counter,1) * 1
SET @VAL2 = SUBSTRING(@Barcode,@counter + 1,1) * 3
SET @SUM = @VAL1 + @SUM
SET @SUM = @VAL2 + @SUM
SET @Counter = @Counter + 2;
END
SET @SUM=(10-(@SUM%10))%10
SET @Return = @BARCODE + CONVERT(varchar,((@SUM)))
RETURN @Return
END
答案 1 :(得分:1)
检查一下。 以下代码可以检查所有GTIN中的数字(EAN8,EAN13,EAN14,UPC / A,UPC / E)
CREATE FUNCTION [dbo].[check_digit]
(
@GTIN VARCHAR(14)
)
RETURNS TINYINT
AS
BEGIN
DECLARE @Index TINYINT,
@Multiplier TINYINT,
@Sum TINYINT,
@checksum TINYINT,
@result TINYINT,
@GTIN_strip VARCHAR(13)
SELECT @GTIN_strip = SUBSTRING(@GTIN,1,LEN(@GTIN)-1);
SELECT @Index = LEN(@GTIN_strip),
@Multiplier = 3,
@Sum = 0
WHILE @Index > 0
SELECT @Sum = @Sum + @Multiplier * CAST(SUBSTRING(@GTIN_strip, @Index, 1) AS TINYINT),
@Multiplier = 4 - @Multiplier,
@Index = @Index - 1
SELECT @checksum = CASE @Sum % 10
WHEN 0 THEN '0'
ELSE CAST(10 - @Sum % 10 AS CHAR(1))
END
IF (SUBSTRING(@GTIN,LEN(@GTIN),1) = @checksum)
RETURN 1; /*true*/
RETURN 0; /*false*/
END
答案 2 :(得分:1)
这也是一个MySQL实现。 请注意,它需要13位UPC / EAN13作为输入,因此您应该根据需要对输入进行LPAD。
drop function if exists barcodify;
delimiter //
at the last digit.
create function barcodify(upc varchar(15))
returns varchar(15)
sql security invoker
begin
declare i, r, odd, even,result int;
set odd=0;
set even =0;
set i = length(upc);
while i > 0 do
set r = substring(upc, i, 1) ;
if(i % 2 >0) then set odd = odd + r;
else set even = even + r;
end if;
set i = i - 1;
end while;
set result = (3*odd)+even;
if result % 10 =0 then return 0;
else return (10 - (result %10));
end if;
end //
delimiter ;
答案 3 :(得分:1)
这是我在Oracle中实现一个函数。
CREATE OR REPLACE FUNCTION GenerateCheckDigit(pUPC IN VARCHAR2) RETURN INT
IS
vCheckDigit INT;
BEGIN
WITH barcodeData AS
(
SELECT pUPC barcode FROM dual
)
SELECT
10-REPLACE(MOD(SUM(SUBSTR(barcode, -LEVEL, 1) * DECODE(MOD(LEVEL-1, 2), 1, 1, 3)),10),0,10) INTO vCheckDigit
FROM barcodeData
CONNECT BY LEVEL <= LENGTH(barcode);
RETURN vCheckDigit;
END;
答案 4 :(得分:0)
CREATE FUNCTION sfn_ean_chkdigit(@barcode varchar(20))
RETURNS CHAR(1)
AS
BEGIN
DECLARE @chk_digit int, @chk int
DECLARE @num TABLE (num int)
IF LEN(@barcode) NOT IN (7, 12) RETURN NULL
INSERT INTO @num
SELECT 1 UNION ALL SELECT 2 UNION ALL SELECT 3 UNION ALL SELECT 4 UNION ALL
SELECT 5 UNION ALL SELECT 6 UNION ALL SELECT 7 UNION ALL SELECT 8 UNION ALL
SELECT 9 UNION ALL SELECT 10 UNION ALL SELECT 11 UNION ALL SELECT 12
SELECT @chk_digit = SUM(CONVERT(int, SUBSTRING(@barcode, LEN(@barcode) - num + 1, 1)) * CASE WHEN num % 2 = 1 THEN 3 ELSE 1 END)
FROM @num
WHERE num <= LEN(@barcode)
SELECT @chk_digit = (10 - (@chk_digit % 10)) % 10
RETURN CHAR(ASCII('0') + @chk_digit)
END