Change Value Of Column Mimetype In Table Data

Aug 23, 2013

I have two tables:

dtr
dataid........Subtype
data
docid....mimetype

I need to change the value of column mimetype in table data, but only for these entries which have the value 144 in column "Subtype" in table dtr.

Here is my sql:

with cte as (
select
DataID,
SubType,
MimeType
from dtr A1, data A2
where A1.dataid=A2.Docid And A1.Subtype='144'
AND
A2.mimetype='application/news-message-id'
)
update cte set MimeType = 'application/x-outlook-msg'

I've tested it and it works. Do you see any problems with this SQL?

As updates are risky I'll do a database backup. Is it possible to get all changed entries so that I can track my update, because I don't have a report about the changes? Maybe that everythin is transferred to an output file?

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hi

I have a table like this




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need to change the table like this







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download

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Thanks
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