oledb xlsx join without on condition

0

I access an xls-document via oledb with c#. I have to join two sheets without any on-condition. I try to get any column-combination which is possible from those two sheets.

Under mssql I can do it using ON 1 = 1 for the join-condition, but that doesn't work here.

Here are some variations i have already tried:

1. SELECT [Grid 1$].[FOO], [Grid 2$].[BAR] FROM [Grid 1$] LEFT JOIN
    [Grid 2$] ON 1 = 1    
2. SELECT [Grid 1$].[FOO], [Grid 2$].[BAR] FROM [Grid 1$] LEFT JOIN
    [Grid 2$] ON TRUE
3. SELECT [Grid 1$].[FOO], [Grid 2$].[BAR] FROM [Grid 1$] CROSS JOIN
    [Grid 2$]

Number 1 and 2 throw:

System.Data.OleDb.OleDbException (0x80040E14): JOIN expression not supported.

Number 3 throws:

System.Data.OleDb.OleDbException (0x80004005): Fehler E_FAIL(0x80004005) in IErrorInfo.GetDescription.

Is there any solution or workaround for this problem?


To point out what i am exactly looking for here is an example:

Sheet 1:
 1. foo
 2. bar
Sheet 2:
 1. jon skeet
 2. harry potter

The query should return:

foo jon skeet
foo harry potter
bar jon skeet
bar harry potter

I hope this points out my intent.

c#
sql
oledb
xlsx
asked on Stack Overflow Aug 16, 2018 by Olli • edited Aug 16, 2018 by Olli

1 Answer

1

Having a LEFT JOIN with a 1=1 condition is pointless. From your explanation you are after a cartesian join (CROSS JOIN and FULL JOIN on some databases). You can do it without any join clause (old style join IOW):

SELECT [Grid 1$].[FOO], [Grid 2$].[BAR] FROM [Grid 1$], [Grid 2$]

Note: And always keep in mind that Excel is not a database.

answered on Stack Overflow Aug 16, 2018 by Cetin Basoz

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