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SQL export, change and import

Posted on 2012-03-27
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Last Modified: 2012-03-28
Hi

I want to export all my tables/tablerows with DATASET-column = 'TST'.
And then IMPORT the tables again (APPEND), with the DATASET-Column set to '123'.

Any ideas .. ?
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Question by:conceptdata
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8 Comments
 
LVL 3

Expert Comment

by:tsnirone
ID: 37770747
Update?
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LVL 3

Expert Comment

by:tsnirone
ID: 37770749
insert into yourtable select col1, col2, col3, "123" from yourtable

?
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Author Comment

by:conceptdata
ID: 37770756
Not update, the 'tst' DATAset rows still needed.
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Author Comment

by:conceptdata
ID: 37770761
I think the thing i'm looking for is a script the exports .
And then a script that imports.
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LVL 16

Expert Comment

by:DcpKing
ID: 37770802
So if you start with a table dbo.aa with column DataSet you end up with all the records where DataSet originally equals 'TST' containing DataSet equal to '123' ?

For one table, this is:

update dbo.aa
    set DataSet = '123'
    where DataSet = 'TST'

Then you have to repeat this for every table that has a field DataSet in it?

The code might be put into a stored procedure:

create procedure dbo.ChangeDataSet
(  @strTableName  varchar(64)    )
as
Begin
   declare @strCmd varchar(2000)
   set @strCmd = 'update ' + @strTableName + '  '
   set @strCmd = @cmd + '  set DataSet = ''123''    '
   set @strCmd = @cmd + '  where DataSet = ''TST''   '
   exec(@strCmd)
End

which gets called for each table like this:

exec dbo.ChangeDataSet(@strTableName)

And the code to get a list of all the tables with a column called DataSet:

declare @taTableList table (TableName varchar(64)
insert into @taTableList
SELECT table_name=sysobjects.name
    FROM sysobjects
    JOIN syscolumns ON sysobjects.id = syscolumns.id
   WHERE sysobjects.xtype='U'
      and syscolumns.name = 'DataSet'

select * from @taTableList

Then you can either use a cursor or a loop to work through @taTableList, getting each table name in turn and running the stored procedure on it.
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Accepted Solution

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DcpKing earned 1500 total points
ID: 37770817
And now you've said "Not update, the 'tst' DATAset rows still needed."

You could adapt the code above by changing the inside of the procedure :
copy  * into tmp from TableName where DataSet = 'TST'
update tmp set DataSet = '123'
insert into TableName select * from tmp
drop table tmp

but you'll have to be aware of uniqueness constraints and identity fields in the table you're putting the data back into!
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LVL 3

Expert Comment

by:tsnirone
ID: 37770829
If you effectively want to duplicate the rows in your table with the new ones having '123' instead of 'TST' the sql I posted should work

insert into yourtable select col1, col2, col3, "123" from yourtable

Be aware though as DcpKing said about uniqueness.....
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Author Comment

by:conceptdata
ID: 37770831
Thanks, I'm looking in your suggested solutions later today :)
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