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 insert multiple rows - performance

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vinay.a
Starting Member

20 Posts

Posted - 2008-06-18 : 02:57:18
hi,

I came across the following topic which speaks about inserting multiple rows into a table.

http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=52980

The following is the code it concludes:
----------------------------------------------------------
INSERT INTO InstitutionManagement.dbo.b10_partC
(unitid, repyear, test, subject_area, scores,
credit_awarded, comments, recno)
select
unitid = 'data1a',
repyear = 'data1b',
test = 'data1c',
subject_area = 'data1d',
scores = 'data1e',
credit_awarded = 'data1f',
comments = 'data1g',
recno = 'data1h'
union all
select
unitid = 'data2a',
repyear = 'data2b',
test = 'data2c',
subject_area = 'data2d',
scores = 'data2e',
credit_awarded = 'data2f',
comments = 'data2g',
recno = 'data2h'
union all
select
unitid = 'data3a',
repyear = 'data3b',
test = 'data3c',
subject_area = 'data3d',
scores = 'data3e',
credit_awarded = 'data3f',
comments = 'data3g',
recno = 'data3h'
... And so on...
----------------------------------------------------------

My question is based on the performance of the above insert statement aganist Microsoft.Net SqlBulkCopy Class.

One more thing: Does the above statement gets executed as asingle statement or as multiple statements (One execution for each Select statement).

thanks

regards,
vinay

spirit1
Cybernetic Yak Master

11752 Posts

Posted - 2008-06-18 : 05:51:57
it gets executed as a single statement.

SqlBulkCopy will surely outperform it.

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vinay.a
Starting Member

20 Posts

Posted - 2008-06-18 : 07:56:05
thanks for your reply

regards,
vinay
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