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sorry, how do I delete in SQL

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sorry, how do I delete in SQL MS SQL Development forum discussing administration, MS SQL queries, and other MS SQL-related topics. SQL Server is Microsoft's enterprise database engine.

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  #1  
Old June 17th, 2004, 03:51 AM
kinx kinx is offline
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sorry, how do I delete in SQL
I think its a really easy Q for those who know, I dont know a thing about sql but a contractor has stuffed me and I need to remove all the test data from a bunch of tables in a database.

Is there an easy way (or a way) to remove all the info in the rows of data in numerous tables without me messing up the tables for future use?

I though using query manager and just DELETE * FROM table_name

is that going to mess things up?

Appreciate the help.
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  #2  
Old June 17th, 2004, 06:42 AM
swampBoogie swampBoogie is offline
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Code:
DELETE FROM table_name


The * shouldn't be there. That will remove all records from the table.
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Old June 18th, 2004, 04:21 AM
kinx kinx is offline
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that is what I want, there are a few different tables and I just want to empty all the data that is there. Is there a difference?
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Old June 18th, 2004, 10:17 AM
redconfetti redconfetti is offline
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DELETE FROM table_name
Yes. That command will just straight out remove all the data in the table. It will not however reset the value for the auto_increment on the ID column you use in the table. I'm still trying to find out how to reset it.
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Old June 18th, 2004, 10:21 AM
kinx kinx is offline
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thanks
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  #6  
Old June 19th, 2004, 04:11 PM
lucasalexander lucasalexander is offline
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An alternative approach is "truncate table table_name."
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http://www.alexanderdevelopment.net
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  #7  
Old June 19th, 2004, 06:00 PM
shammat shammat is offline
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Quote:
Originally Posted by swampBoogie
The * shouldn't be there. That will remove all records from the table.

There is absolutely no difference between DELETE FROM table and DELETE * FROM table. Both commands delete all records.
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Old June 20th, 2004, 08:48 AM
swampBoogie swampBoogie is offline
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The syntax

Code:
delete * from t


is specific to Access. It does not work in any other DBMS AFAIK,
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Old June 21st, 2004, 04:35 PM
shammat shammat is offline
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I have to apologize...

I do not even work with Access, but I was so sure that DELETE * FROM was SQL standard (and understood by most DBMS that I know), that I didn't even bother to check it. But not even SQL Server accepts it...

I know better next time

Cheers
Thomas
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  #10  
Old June 28th, 2004, 07:04 AM
rikb53 rikb53 is offline
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delete or truncate?
why not do a truncate table?

TRUNCATE table table_name

thanks
rik
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