Compare Excel and Database Tables

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Hi,

I'm trying to create a small application to get data from database and export it to excel.

I want to compare input file Excel (one or more columns will be in excel) and compare same columns in database and return matched data and export it to excel.

For example if excel file has Columns: Account,Account Id

Database may have columns : Account,Account Id, Name,Address

process should compare Account and Account ID then return Name and Address for all the records.

Also file may contain huge data (2 to 3Gd ).

Please advise how to compare and extract data to excel.

Regards,
harish

Posted 21-Jan-14 10:02am

harishgajawada

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Maciej Los · Accepted Answer · 2014-01-21T10:40:00

Solution 1

What's the problem?

Have a read this: Accessing Microsoft Office Data from .NET Applications[^]
As you can see, you can access MS Excel data using ADO.NET (OleDb) provider. What it meant to you?
You can compare data using

single sql command with OPENROWSET[^] or OPENDATASOURCE[^] command. For example, if you want equal data, use this:

SQL

SELECT a.Field1, a.Field2
FROM dbo.TableName as A INNER JOIN (
SELECT *
 FROM OPENROWSET('Microsoft.Jet.OLEDB.4.0',
  'Excel 8.0;Database=C:\excel-sql-server.xls', [Sheet1$])) AS b ON a.ID = b.ID

More examples: The Basics of Excel Data Import to SQL Server[^]

linq[^]. How? Load from Excel and SQL server into separate datatables[^]. Convert it to IEnumerable/IQuerable objects[^] and compare using linq query.

Posted 21-Jan-14 10:40am

Maciej Los

Comments

harishgajawada 22-Jan-14 13:11pm

Thanks for the reply. i'm new to asp.net and i was not aware of this.

Once again thanks for the Help.

Maciej Los 22-Jan-14 13:12pm

You're welcome ;)

harishgajawada 23-Jan-14 11:21am

Maciej Los,

Please help me on below.

if i fill data table with excel data ,then can i pass datatable values in sql query like (select * from database.table where account in(select * from datatable))?

plesae advise.

Maciej Los 24-Jan-14 2:52am

Using T-SQL - you can't. Using Linq - you can ;)

harishgajawada 14-Feb-14 13:12pm

Hi Maciej Los,

I'm Using blelow as sql command and i'm getting ora-00907: missing right parenthesis.
i searched online and found that it is related to some missing "'" etc. i looked at the query and its is correctly formattted. can you please advice what i'm missing in below. i'm using "OleDb" to connect to oracle and fill the datatable.

SELECT CONCAT ( AL1.B_CD, AL1.A_CD ) as ac AL1.NA_LINE_TXT FROM table1.na AL1 right join ( select * from openrowset('Provider=Microsoft.ACE.OLEDB.12.0';Data Source='C:\Harish\New Microsoft Office Excel Worksheet.xlsx';Extended Properties="Excel 12.0;HDR=Yes;IMEX=2",[Sheet1$])) as b on ac=b.ac

Maciej Los 14-Feb-14 14:59pm

I'm sure that OPENROWSET instruction is not a part of Oracle database engine.
Please, see: http://technology.amis.nl/2006/08/04/using-an-oracle-database-link-to-connect-to-excel/

Sergey Alexandrovich Kryukov 3-Mar-14 19:11pm

5ed. It wasn't even a question... :-)
—SA

Maciej Los 4-Mar-14 1:42am

Thank you, Sergey ;)