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Find and replace part of a string

Posted on 2011-09-05
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Last Modified: 2012-05-12
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I have string responses stored in my table.  Some of the responses contain "dbmSnippets" within the response string.  I would like to find all of the dbmSnippets and replace them with \' keeping the rest of the response in tact.  Any suggestion on how to do this would be appreciated.

Thanks
Nick
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Question by:nmarano
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NetExpert-Warszawa earned 400 total points
ID: 36485289
UPDATE tablename SET response = REPLACE(response, 'dbmSnippets', '\') WHERE response LIKE '%dbmSnippets%';
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by:nmarano
ID: 36485343
Thanks Net.

 Will that keep the rest of my string intact?  So if my string looks like,
Yes~I agree that JuliadbmSnippetss quadlateral performance"  Will it simply replace the dbmSnippets to look like...
"Yes~I agree that Julia's quadlateral performance"
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Expert Comment

by:Kevin Cross
ID: 36485387
It looks like the current query is replacing it with a slash '\' -- update the code to be REPLACE(response, 'dbmSnippets', '\'') and it will result in only the dbmSnippets being replaced. The rest of the string will be untouched.
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by:NetExpert-Warszawa
ID: 36485391
No, it will not. I have thought you want \, not '.

You need:
UPDATE tablename SET response = REPLACE(response, 'dbmSnippets', "'") WHERE response LIKE '%dbmSnippets%';

WHERE response LIKE '%dbmSnippets%' will look for all rows for which a column response contains dbmSnippets.

REPLACE(response, 'dbmSnippets', "'") will produce a string that will be a content of response with all dbmSnippets replaced with '.

Before you run it over your production table, create a test table and try the query on it.
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Author Comment

by:nmarano
ID: 36485573
Sorry net correct, I want /'
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Expert Comment

by:NetExpert-Warszawa
ID: 36485585
Just put what you want as the third parameter for REPLACE.
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Author Comment

by:nmarano
ID: 36485594
Net, I'm looking for a slash and an apostrophe so the replace will be /'

Thanks
nick
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Expert Comment

by:NetExpert-Warszawa
ID: 36485610
You are not limited to a single character. Try:

UPDATE tablename SET response = REPLACE(response, 'dbmSnippets', "/'") WHERE response LIKE '%dbmSnippets%';
or
UPDATE tablename SET response = REPLACE(response, 'dbmSnippets', '/\'') WHERE response LIKE '%dbmSnippets%';
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Author Comment

by:nmarano
ID: 36485718
Hey Net,

Sorry for the confusion.  So, I'm looking to use \' and not the back slash/.  Now I tested it on a couple of results, but it's taking the dbmSnippets out but only replacing it with a ' instead of \'....

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Assisted Solution

by:Kevin Cross
Kevin Cross earned 100 total points
ID: 36485757
Here is a reference on escaping special characters in MySQL:
http://dev.mysql.com/doc/refman/5.0/en/string-syntax.html

Manual on REPLACE:
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace

What you want is:
REPLACE(response, 'dbmSnippets', '\\\'')

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Expert Comment

by:Kevin Cross
ID: 36485764
Please credit, Net, by the way. Just helping you get the understanding you need.
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Author Comment

by:nmarano
ID: 36485813
thank you guys for your help.  Truly appreciated.  Net, thanks for the query, and mwvisa, thanks for the links.
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