Friday, October 19, 2012

SQL Server: Quickest Method to Create Single Table Backup

There are several ways to create backup for a single table in SQL Server database. In SQL Server 2008, now you can create insert statements for selected tables. Beside this Export wizard is commonly used to create a flat file backup for a single table. Both methods are reliable but still time consuming. And when I searched for quickest method to take backup of a single table I found following code by SQL Expert Fred.

USE AdventureWorks
DECLARE @table VARCHAR(128),
@file VARCHAR(255),
@cmd VARCHAR(512)
-- If i need to create CSV file Product table then
SET @table = 'Production.Product'
SET @file = 'D:\BCP_OUTPUT\' + @table + '_' + CONVERT(CHAR(8), GETDATE(), 112)
+ '.csv'
SET @cmd = 'bcp "AdventureWorks.' + @table + '" out "' + @file + '" -S. -T -c -t,'
EXEC master..xp_cmdshell @cmd
Code basically uses BCP to create a CSV file for a given table. I can create a template of above code, and then just load, change values and execute. So simple but still it has a drawback. It creates a CSV file for all rows but WITHOUT column header row. Now how can I import this table later on, without column header row?

Then I found quickest and simplest way to achieve this goal. Simply type select * query but before execution
• Click on Tools --- > options and change values for Query Result Output Format and Custom Delimiter (I preferred pipe sign “|”)
• Press Ctrl+Shift+F buttons, so it can save result to file.
SELECT * FROM Production.Product
• On execution, provide file name and your desired path and it’s done
Don’t worry about newly created file extension. When need to import just select it from All Files (*,*).

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