SQl query to remove all characters to the right help needed

SQL 2008 database with three tables

today I found my database was corrupted with a lot of characters from my web site

it added <div style=............   many times on the record

I started deleting the info by hand but I have over 40000 records to go thru.

when I update the record manually I place the cursor on the line right before the <div then I hit CNTRL + Del keys and everything from the right is removed.


example

702<div style="display:none">online <a href="http://geekiest.net/post/250-awesome-photography-tutorials.aspx">read</a> redirect</div>

702 is all I want here

This is not positional the values prior to the <div are mixed lengths.

this is all on one column

is there a query that can do this


Thanks

Hoping to save a lot of time
LVL 23
Thomas GrassiSystems AdministratorAsked:
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Lee SavidgeCommented:
Test first but this should do it.
update myTable set myColumn = left(myColumn, CHARINDEX('<', myColumn)-1)

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ste5anSenior DeveloperCommented:
E.g.

DECLARE @Text NVARCHAR(255) = N'702<div style="display:none">online <a href="http://geekiest.net/post/250-awesome-photography-tutorials.aspx">read</a> redirect</div>';

SELECT  CASE WHEN PATINDEX('%<div styl%', @Text) > 0 THEN SUBSTRING(@Text, 1, PATINDEX('%<div styl%', @Text) - 1)
             ELSE @Text
        END;

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The test pattern must be long enough, otherwise it would mask valid content.

btw, this is not corruption, this is a bad development habit: Writing non-sanitized user-content to the database.
Mike EghtebasDatabase and Application DeveloperCommented:
if all 40000 records need to have 702 and there are only 40000 records in the table, then consider:

Uodate Table1 Set ColumnName = 702
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Thomas GrassiSystems AdministratorAuthor Commented:
Guys

first thanks for responding so quickly

the 702 was just an example not all records are 702

here is a sampling of the db see attached first 30 plus records are valid look at column B


Lee I ran your query
update dbo.recordings set RecordingTitle = left(RecordingTitle, CHARINDEX('<', RecordingTitle)-1)

got this error

Msg 537, Level 16, State 5, Line 1
Invalid length parameter passed to the LEFT or SUBSTRING function.
The statement has been terminated.



thoughts
dbo-recordings.xlsx
dsackerContract ERP Admin/ConsultantCommented:
Lee's post (being the first and correct) deserves the bulk of points, but you simply need to add a WHERE statement to the UPDATE.

update myTable set myColumn = left(myColumn, CHARINDEX('<', myColumn)-1)
WHERE CHARINDEX('<', myColumn ) > 0

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Thomas GrassiSystems AdministratorAuthor Commented:
Thanks to every one


one simple query saved me hours of work
ste5anSenior DeveloperCommented:
Well, just be sure that no column had '0<1' as content before your "corruption".
Thomas GrassiSystems AdministratorAuthor Commented:
ste5an

yes the database is all good now made a full backup and saved a copy elsewhere

it was not corrupt somehow my web site has a hole in it allowing that to happen need to investigate  that end

Just glad the site is working now.
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Microsoft SQL Server 2008

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