I have a MySQL InnoDB database.
I have a column my in 'article' table called url that needs to be updated.
Stored in article.url =
/blog/2010/article-name
/blog/1998/the-article-name
/blog/...
I need to change /blog/ to /news/. (E.g. now article.url = '/news/...')
What is the SQL needed to replace "/blog/" with "/news/" in the article.url column?
update url
set article = replace(article, '/blog/', '/news/')
where article like '/blog/%'
If every url starts with "/blog/" and you don't want to change anything except the prefix, then you can just use substring() and concat() instead of replace():
update article
set url = concat('/news/',substring(url,7))
where url like '/blog/%';
I recently wanted to replace a string within MySQL on the fly, but the field could contain 2 items. So I wrapped a REPLACE() within a REPLACE(), such as:
REPLACE(REPLACE(field_name, “what we are looking for”, “replace first instance”),
“something else we are looking for”, “replace second instance”)
This is the syntax I used to detect a boolean value:
REPLACE(REPLACE(field, 1, “Yes”), 0, “No”)
Hope this helps!
Related
I have a function that generates a new user in the database.
I would like to check if the email address contains any quotes and if it does, I would like to duplicate them.
For example, I have the following email address: test.o'test#test.com and I would like to transform it into test.o''test#test.com.
Could anybody help me with this?
Thank you
Assuming you expect only one single quote (and not double or more), you could try using a simple replace:
UPDATE yourTable
SET email = REPLACE(email, '''', '''''');
I am having a clob field rq_dev_comments which should replace the username with "anonymous"
Update <TABLE>.req
Set rq_dev_comments = regexp_REPLACE(rq_dev_comments,
'\<[bB]\>.*gt;,', '<b>anonymous ')
where length(rq_dev_comments) > ...
Now my question is, if there is a way to check before wheather "anonymous" is already set or not and how to reduce the datasets?
Example:
rq_dev_comments = "<html><b>HendrikHeim</b>: I found an error....</html>"
Desired: "<html><b>Anonymous</b>: I found an error....</html>"
The following solution will not catch cases where "username" may appear more than once, and some but not all occurrences have already been replaced with "anonymous". So think twice before you use it. (The same would apply to ANY solutions along the lines of what you asked!)
Add the following to your WHERE clause:
... where length(...) ....
and dbms_lob.instr(rq_dev_comments, '<b>Anonymous') = 0
"= 0" means the search pattern wasn't found in the input string.
Another thing: In the example you show "anonymous" capitalized (with upper case A), but in your code you have it all lower case. Decide one way or another and be consistent. Good luck!
I am having a table named "OptionsDetail" with column named "URL" in postgresql database. The "URL" column contain the following data
URL
http://www.site1.com/ebw/file1/detail.action?cid=1
http://www.another2.com/ebw/file1/detail.action?cid=11&code=MYCODE
http://www.anothersite3.com/ebw/file1/detail.action?cid=12&code=ANOTHERCODE&option=ROOM
Now I want to replace the data in URL to
URL
/file1/detail.action?cid=1
/file1/detail.action?cid=11&code=MYCODE
/file1/detail.action?cid=12&code=ANOTHERCODE&menu=ROOM
I wrote the following query to perform the above functionality
UPDATE "OptionsDetail" SET "URL" = replace("URL",'http://%/ebw/file1','/file1') WHERE "URL" LIKE '%/ebw/file1%';
And also another way I wrote like this
UPDATE "OptionsDetail" SET "URL" = replace("URL",'%/ebw/file1','/file1') WHERE "URL" LIKE '%/ebw/file1%';
Query is executing successfully saying like for ex: 200 rows affected but "URL" column data is not changing the way I need, the data is remaining as it is.
Please help me to resolve this issue
The problem is that replace doesn't support wildcards like %:
replace("URL",'http://%/ebw/file1','/file1')
^^^
You can use regexp_replace instead:
UPDATE YourTable
SET URL = regexp_replace(URL, 'http://.*/ebw/file1', '/file1')
WHERE URL LIKE '%/ebw/file1%'
Note that regexp_replace uses different wildcards than like. In regular expressions, "Any number of any character" is .* instead of %.
See it working at SQL Fiddle.
I have a table and one of the columns contains html for an iFrame & within it an external video, specifically it's like
<iframe src="http://host.com/videos/ID" otherattributes...></iframe>.
I need to update the current column or create a new one (doesn't matter) so what I have is just the ID of that video, I know I could use a regex for it but I'm really weak with it.
perhaps so it find the content that is within literal characters: [videos/] and the upcoming ["] which comes right after the ID but I'm unsure how.
You can use CHARINDEX() function:
update T SET
VideoID=SUBSTRING(descr,
charindex('/videos/',descr)+LEN('/videos/'),
charindex('"',descr,charindex('/videos/',descr)+LEN('/videos/'))
-(charindex('/videos/',descr)+LEN('/videos/')))
SQLFiddle demo
This should work, assuming the text videos/ doesn't appear anywhere else in the html.
update htmltable
set id = SUBSTRING(SUBSTRING(html,
CHARINDEX('videos/', html) + 7,
LEN(html)
),
0,
CHARINDEX('"', SUBSTRING(html,
CHARINDEX('videos/', html) + 7,
LEN(html)
)
)
)
This updates a field named otherfield in table htmltable where the id in the url is '123'. It's pretty ugly code, but SQL Server has limited string functions.
If you have any control over the table structure, I would suggest you make some changes. The video ID should be stored in its own column, separate from the rest of the url. Then when you need to retrieve the url, you would concatenate the two parts to get the whole url. That would be much more maintainable.
I am trying to change the values of a column in my SQL Server Database.
Table: crm.activity
Column: Content
The values look like this:
value 1:
{\rtf1\ansi\ansicpg1252\deff0\deflang2055{\fonttbl{\f0\fnil\fcharset0 Microsoft Sans Serif;}}
\viewkind4\uc1\pard\f0\fs17 Appointment made\par
}
value 2:
{\rtf1\ansi\ansicpg1252\deff0\deflang2055{\fonttbl{\f0\fnil\fcharset0 Microsoft Sans Serif;}}
\viewkind4\uc1\pard\f0\fs17 Ask for offer\par
}
What I need is just the bold text.
Is it possible like using RegEx to go through all the columns and change the value???
To my knowledge, you can't do regex replaces in MySQL out of the box. However, if there's only one bold string per column, it should be easy enough to do the trick with string functions like LOCATE and SUBSTR.
http://dev.mysql.com/doc/refman/5.7/en/string-functions.html
Here you go. This is for MySQL:
SELECT SUBSTRING_INDEX(SUBSTRING_INDEX('{\rtf1\ansi\ansicpg1252\deff0\deflang2055{\fonttbl{\f0\fnil\fcharset0 Microsoft Sans Serif;}} \viewkind4\uc1\pard\f0\fs17 **Appointment made**\par}', '**', -2), '**', 1);
# => Appointment made
Or to update (try it first and make sure you have a backup):
UPDATE mytable SET mycolumn = SUBSTRING_INDEX(SUBSTRING_INDEX(mycolumn, '**', -2), '**', 1);
If its SQL Server, do a bit of googling (mssql update replace regex) on how to add a regex replace method to SQL server. The regex you will need is: .+\\fs\d+\s(.+)\\par\s?}, replace this with $1. As a fallback solution (not sure how much data you have in that table) you could write a small script that selects all records, replaces the string, and updates the database.