I work on my site in localhost, I have a field in my database which I store absolute url of some pictures, so all records are like http://localhost/my_project/images/picture.jpg and now in my website this records not work, I should change all records to like this 'http://www.mysite.com/images/picture.jpg', so I found replace command for mysql but this command will replace all part of field:
UPDATE tablename SET tablefield = replace(tablefield, "findstring", "replacestring");
How can I change just http://localhost/ in my records with phpmyadmin ?
First, you should remove the domain name from all of your url's. Simple using /images/picture.jpg will allow it to work on all hosts.
To replace it globally, I would recommend doing a mysqldump and opening the file in a text editor, replacing the strings, and importing it back into the database. That's assuming you don't have any serialized strings (wordpress) in your database.
To simply strip the 'http://localhost' prefix, in order to use host-less absolute paths as recommended in #Rob's answer:
UPDATE tablename
SET tablefield = SUBSTR(tablefield FROM 17)
WHERE tablefield LIKE 'http://localhost/%'
See it on sqlfiddle.
To replace with 'http://www.mysite.com' as asked in the original question:
UPDATE tablename
SET tablefield = CONCAT('http://www.mysite.com', SUBSTR(tablefield FROM 17))
WHERE tablefield LIKE 'http://localhost/%'
See it on sqlfiddle.
Of course, neither of these answers use regular expressions as requested in your question title (although they do use simple pattern matching); to use regular expression pattern replacement, you will need to install and use a UDF such as provided by lib_mysqludf_preg.
Related
Using MySQLAdmin. Moved data from Windows server and trying to replace case in urls but not finding the matches. Need slashes as I don't want to replace text in anything but the urls (in post table). I think the %20 are the problem somwhow?
UPDATE table_name SET field = replace(field, '/user%20name/', '/User%20Name/')
The actual string is more like:
https://www.example.com/forum/uploads/user%20name/GFCI%20Stds%20Rev%202006%20.pdf
In a case you are using MariaDB you have REGEXP_REPLACE() function.
But best approach is to dump the table into the file. Open it in a Notepad ++
and run regex replace like specified on a pic:
Pattern is: (https:[\/\w\s\.]+uploads/)(\w+)\%20(\w+)((\/.*)+)
Replace with: $1\u$2\%20\u$3$4
Then import the table again
Hope this help
If its MariaDB, you can do the following:
UPDATE table_name SET field = REGEXP_REPLACE(field, '\/user%20name\/', '\/User%20Name\/');
First, please check, what is actually stored in the database: %20 is a html-entity which represents a whitespace. Usually, when you are storing this inside the database, it will be represented as an actual whitespace (converted before you store it) -> Hence your replace doesn't match the actual data.
The second option that might be possible - depending on what you want to do: You are seeing the URL containing %20, therefore you created your database records (which you would like to fetch) with that additional %20 - And when you now try to query your results based on the actual url, the %20 is replaced with an "actual" whitespace (before your query) and hence it doesn't match your stored data.
In my database I have a table called 'content' and a field called 'link' and there are almost 300,000 records in that table.
In the field called 'link' there are a number of records that look like this :
http://www.example.com/blah/blah/123456789/url=http://www.destination.com
Unfortunately the prefix part of the records are individually unique where the numbered portion is constant changing from 90 to 150 alpha-numeric characters
I would like to remove the prefix up to and/or including the url=
So that the only thing left in the record is :
http://www.destination.com OR
I could even work with
url=http://www.destination.com
and simply do a replace command against the "url=" part as a second mysql command.
If there was a wildcard command, this job would be much easier and I would just wildcard everything showing up in the link record between :
http://www.example.com/blah/blah/ wildcard url=
But as everyone knows... there is no such wildcard available
So it had me looking at the UPDATE, SET and TRIM(LEADING commands
UPDATE content
SET link =
TRIM(LEADING 'url=' FROM link)
But this DID NOT generate the changes I wanted
And so I took the labor intensive method of downloading the database and using a Search and Replace program to make the changes to the 44 thousand records that contained these parameters.
But I would love to find a command that I could simply pass to the database to make this simpler in the future.
Any thoughts on how to accomplish this change in the future would be greatly appreciated.
Thanks in advance ;
You can use the SUBSTRING_INDEX function:
UPDATE content SET link=SUBSTRING_INDEX( `link` , 'url=', -1 )
I have not tested it, so I would recommend you check that substring_index returns the desired string first.
Assuming that the part you want to keep always begins with 'http://' you could get the desired result string with the help of the SUBSTRING_INDEX function:
SELECT CONCAT('http://', SUBSTRING_INDEX(link, 'http://', -1)) FROM content;
and fix your table with the simple statement
UPDATE
content
SET
link = CONCAT('http://', SUBSTRING_INDEX(link, 'http://', -1));
Explanation:
SUBSTRING_INDEX with third parameter negative returns the substring from the last occurence of the needle in the second parameter to the end. Because 'http://' isn't included in the return value, we add it again.
Remark:
If you've got https:// urls too, you should be able to adapt my solution.
I've a sql database, there is an table with column 'value', that column contains html code, in this code I want to find file location "templates/images" & replace it.
For find it that wasn't a real problem:
SELECT * FROM `catalog_product_entity_text` WHERE `value` REGEXP '(templates\/images)'
How to complete the line to replace just this text by something like 'theme/name/img'?
If this is a one-time need, this sounds like something you can do without a regex. Using some database tools, you can do a simple search-and-replace for the actual string "template/images" in your database.
For instance, on Windows, you can do this in HeidiSQL (a free program).
I am struggling with this query and want to know if I am wasting my time and need to write a php script or is something like the following actually possible?
UPDATE my_table
SET #userid = user_id
AND SET filename('http://pathto/newfilename_'#userid'.jpg')
FROM my_table
WHERE filename
LIKE '%_%' AND filename
LIKE '%jpg'AND filename
NOT LIKE 'http%';
Basically I have 700 odd files that need renaming in the database as they do not match the filenames as I am changing system, they are called in the database.
The format is 2_gfhgfhf.jpg which translates to userid_randomjumble.jpg
But not all files in the database are in this format only about 700 out of thousands. So I want to identify names that contain _ but don't contain http (thats the correct format that I don't want to touch).
I can do that fine but now comes the tricky bit!!
I want to replace that file name userid_randomjumble.jpg with http://pathto/filename_userid.jpg So I want to set the column user_id in that row to a variable and insert it into my new filename.
The above doesn't work for obvious reasons but I am not sure if there is a way round what I'm trying to do. I have no idea if it's possible? Am I wasting my time with this and should I turn to PHP with mysql and stop being lazy? Or is there a way to get this to work?
Yes it is possible without the php. Here is a simple example
SET #a:=0;
SELECT * FROM table WHERE field_name = #a;
Yes you can do it using straightforward SQL:
UPDATE my_table
SET filename = CONCAT('http://pathto/newfilename_', userid, '.jpg')
WHERE filename LIKE '%\_%jpg'
AND filename NOT LIKE 'http%';
Notes:
No need for variables. Any columns of rows being updated may be referenced
In mysql, use CONCAT() to add text values together
With LIKE, an underscore (_) has a special meaning - it means "any single character". If you want to match a literal underscore, you must escape it with a backslash (\)
Your two LIKE predicates may be safely merged into one for a simpler query
I found a CSV database of Cities/ZIP/GPS, and when I imported it, it added a " infront of the columns.
alt text http://www.grabup.com/uploads/58754a865eebd94c9aafaf7444b52d15.png?direct
I don't want to go in for 33,000 entries and do this manually, is there a query I can run that will remove the quotes?
i'm not a MySql expert but this should work: (based on my similar experience in Sql Server)
UPDATE table_name SET col_name = REPLACE(col_name, '"', '')
For more info on the REPLACE and other string parsing functions, see here:
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace
in sql server you coud do:
update mytable set state= substring(state,2,29)
change the "29" to whatever the actual length is.
I am sure mysql must have equivalent syntax.
Repeat for each field, it looks like there is only a handful of them.
As an alternative you could filter the original csv document - isn't that easier?