我如何将这两者结合在一起?Varchar guid 和 guid 都输入主键 [英] How do I join these two together? Varchar guid and guid type both primary keys

问题描述

我正在尝试比较两种不同的列类型(不是我做的，是数据转换项目的一部分).一个存储的表单 guid 类似于以下内容:

I'm trying to compare two different column types (not my doing, part of a data conversion project). One has form guids stored similar to the following:

0CAF3FBC-3C76-420B-B0C4-42867551E3B5

另一个将它们存储如下:

The other has them stored as the following:

{0CAF3FBC-3C76-420B-B0C4-42867551E3B5}

在此列上连接这两个表的最佳方法是什么(不幸的是，它是两者的主键).到目前为止，我已经尝试将一张表作为 guid(没有成功)并尝试构建一个 like 语句 - 但一直不确定如何处理这个.

What would be the best way to join both of these tables on this column (unfortunately it's a primary key for both). So far I've tried casting one table as a guid (with no success) and also tried to build a like statement - but have been unsure how to approach this.

非常感谢任何帮助.

如果是数据，这在语法上是否正确?

In case it's the data, is this syntactically correct?

inner join  report_temp.workflow_lease_proposal lp
    on wif.form_guid like '%' + lp.form_guid + '%'

推荐答案

SQL Server 在比较具有不同数据类型的值时非常智能.

SQL Server is quit intelligent when it comes to comparing values having different datatypes.

以下脚本按原样运行，无需任何显式转换

Following script works as is without any explicit conversion

DECLARE @TableA TABLE (VARCHARID VARCHAR(48) PRIMARY KEY)
DECLARE @TableB TABLE (GUIDID UNIQUEIDENTIFIER PRIMARY KEY)

INSERT INTO @TableA VALUES 
    ('{0CAF3FBC-3C76-420B-B0C4-42867551E3B5}')
  , ('{0CAF3FBC-3C76-420B-B0C4-42867551E3B6}')
  , ( '0CAF3FBC-3C76-420B-B0C4-42867551E3B7' )
  , ( '0CAF3FBC-3C76-420B-B0C4-42867551E3B8' )

INSERT INTO @TableB VALUES 
    ('{0CAF3FBC-3C76-420B-B0C4-42867551E3B5}')
  , ( '0CAF3FBC-3C76-420B-B0C4-42867551E3B6' )
  , ('{0CAF3FBC-3C76-420B-B0C4-42867551E3B7}')
  , ( '0CAF3FBC-3C76-420B-B0C4-42867551E3B8' )

SELECT  *
FROM    @TableA a
        INNER JOIN @TableB b ON b.GUIDID = a.VARCHARID

结果

VARCHARID                               GUIDID
{0CAF3FBC-3C76-420B-B0C4-42867551E3B5}  0CAF3FBC-3C76-420B-B0C4-42867551E3B5
{0CAF3FBC-3C76-420B-B0C4-42867551E3B6}  0CAF3FBC-3C76-420B-B0C4-42867551E3B6
0CAF3FBC-3C76-420B-B0C4-42867551E3B7    0CAF3FBC-3C76-420B-B0C4-42867551E3B7
0CAF3FBC-3C76-420B-B0C4-42867551E3B8    0CAF3FBC-3C76-420B-B0C4-42867551E3B8

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