Insert table records in MSSQL 2005

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SQL-Server-2005

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Hi,

I have a table as following schema -

SQL

CREATE TABLE [dbo].[hotel_info](
	[hotel_code] [varchar](20) NOT NULL,
	[images] [varchar](100) NULL

)

I have composite key on [hotel_code] and [images] columns .

Weekly, I get CSV file for inserting records into table. I have to insert only new records based on composite key from CSV to table.

Problem is CSV file has more than 2,00,000 records and there are only few new records weekly to insert.

So I am facing some performance degradation issue.

Could you please suggest few alternative approaches to tackle this scenario.

I have tried Subquery, NOT EXISTS, DISTINCT.

I am using MSSQL 2005 edition.

Posted 2-Nov-12 0:28am

vikram_shinde

Updated 2-Nov-12 0:35am

v2

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MT_ 2-Nov-12 6:55am

How are you currently doing? Are you passing data to SP?

vikram_shinde 2-Nov-12 7:06am

It's in initial stage so I haven't created SP. Just trying using simple query.

MT_ 2-Nov-12 7:28am

front-end ? c# ? or no front end ?

vikram_shinde 2-Nov-12 7:35am

c# webapp.
Wants to send csv file with web request.

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Corporal Agarn · Answer 1 · 2012-11-02T02:53:00

Solution 1

Try using a left join:

SQL

INSERT INTO hotel_info (hotel_code, images) 
SELECT A.hotel_code, A.images 
FROM importtable A 
LEFT JOIN hotel_info B ON A.hotel_code = B.hotel_code
                         AND A.images = B.images 
WHERE B.hotel_code IS NULL;

Posted 2-Nov-12 2:53am

Corporal Agarn