Question

我正在使用此语句将条目从一个表放入另一个表。我需要随机生成的部分对于拉到表A的每条记录都是唯一的，但现在它对所有这些都是相同的。

如何修复此查询，以便@CharacterData变量对于拉入tableA的每条记录都是唯一的？

更新：将随机生成的内容移动到存储过程dbo.RandChars

ALTER PROCEDURE [dbo].[RandChars]
    -- Add the parameters for the stored procedure here
    (@Length int)
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;
    -- Insert statements for procedure here
declare @BinaryData varbinary(max)
, @CharacterData varchar(max)
set @BinaryData=crypt_gen_random(@Length) 
set @CharacterData=cast('' as xml).value('xs:base64Binary(sql:variable("@BinaryData"))', 'varchar(max)')
PRINT @CharacterData
END

如何利用此存储过程将唯一的随机字符串放入每行的令牌记录中？

Insert INTO TableA
(TableA.firstname,
TableA.token,
TableA.email,
TableA.emailstatus, 
TableA.language, 
TableA.remindersent, 
TableA.attribute_1,
TableA.attribute_2)


SELECT TableB.[Franchise Location], 
[**random string for token**],
TableB.[Franchise Email],
'OK', 
'en',  
'N', 
TableB.[Order Number], 
TableB.[Invoice Date]
FROM TableB
WHERE TableB.[Order Date] >= dateadd(DAY, -1, Convert(date, GETDATE()))

Answer 1

您可以从嵌套选择中的列中选择一个值：

--> set up test data...
create table tableB ( id int )
create table tableA ( id int, rnd varchar(max ) )
go
insert tableB( id ) values( 1 ) ,( 2 ), ( 3 ) --> etc
go

--> do the work...
insert tableA( id, rnd )
select 
    sub.id,
    cast( '' as xml ).value('xs:base64Binary(sql:column( "rx" ) )', 'varchar(max)' )
from
    (
    select
        id,
        crypt_gen_random( 4 ) rx
        from 
        tableB
    ) as sub

go

--> inspect the results...
select * from tableA
go

--> cleanup...
drop table tableA
drop table tableB

...并完全跳过使用程序。

修改

因此，使用您的示例，语法更像是：

insert TableA ( firstname, token, email, emailstatus, [language], remindersent, attribute_1, attribute_2 ) select location, cast( '' as xml ).value('xs:base64Binary(sql:column( "token" ) )', 'varchar(max)' ), email, emailstatus, [language], remindersent, attribute_1, attribute_2 from ( select TableB.[FranchiseLocation] location, crypt_gen_random(30) as token, TableB.[Franchise Email] email, 'OK' emailstatus, 'en' [language], 'N' remindersent, TableB.[Order Number] attribute_1, TableB.[Invoice Date] attribute_2 from TableB where TableB.[Order Date] >= dateadd(DAY, -1, Convert(date, GETDATE())) ) as x

我没有这些表 - 所以这是尝试之前你买的尝试： - ）

插入随机生成的字符

1 个答案: