36->10
CREATE PROCEDURE [Convert36To10] @Res36 CHAR(9), @Deci INT OUTPUT AS
SET NOCOUNT ON
DECLARE @j INT
DECLARE @Arr36 CHAR(36)
SELECT @Arr36 = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
SELECT @Deci = 0
SELECT @j = 1
while @j <= LEN(LTRIM(RTRIM(@Res36)))
begin
if @j <> 1
SELECT @Deci = @Deci*36
SELECT @Deci = @Deci + CHARINDEX(SUBSTRING(LTRIM(RTRIM(@Res36)), @j,1),@Arr36) -1
SELECT @j = @j+1
end
Обратно:
CREATE PROCEDURE [Convert10To36] @Deci INT, @Res36 CHAR(9) OUTPUT AS
SET NOCOUNT ON
DECLARE @j INT
DECLARE @Arr36 CHAR(36)
SELECT @Arr36 = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
SELECT @Res36 = ''
SELECT @j = LOG(@Deci)/LOG(36) +1
while @j>0
begin
SELECT @Res36 = LTRIM(RTRIM(@Res36)) + SUBSTRING(@Arr36, @Deci/POWER(36,@j-1) +1 ,1)
SELECT @Deci = @Deci%POWER(36,@j-1)
SELECT @j =@j-1
end
