I have in my db strings like www.domain.com and http://www.domain.com. I want to prepend to all entries the http:// but not affect other urls and as a result have this: http://http://www.domain.com
Can this be done with mysql only? I have used REPLACE(field,'www','http://www'), but this replaces also the http://www with http://http://www
Thanks in advance
EDIT
I forgot to mention that in the field there might be entries which don't contain www or http://www and therefore I don't want to alter or maybe there are entries like <p>domain</p> in which CONCAT() prepends the http:// before <p>
Try adding a WHERE clause to your update to only update fields that do not already have 'http://'. Test it out like this
SELECT CONCAT('http://', field) FROM foo WHERE LOCATE('http://', field)=0
and your UPDATE syntax would be:
UPDATE foo SET field=CONCAT('http://',field) WHERE LOCATE('http://', field)=0
I won't worry about performance as this seems like a one-off kind of script. That said, you can couple LEFT and CONCAT to achieve this:
UPDATE mytable
SET mycolumn = CONCAT('http://',mycolumn)
WHERE LEFT(mycolumn,7) <> 'http://'
Do note that I'm not taking CapItaliZation in to account. You may also want to consider sanitizing the information either before adding it to the database, or maybe make a trigger to do it for you.
Search and Replace Query - mysql replace
Here is the SQL query to replace string in your MySQL database table:
UPDATE table_name SET column_name = REPLACE(column_name,'original_string','replace_string')
Here is what I did to change the path URLs in all my previous posts.
UPDATE `wp_posts` SET `post_content` = REPLACE(`post_content`,'http://localhost/','https://sureshkamal1.wordpress.com/')
Related
I have a table that contains directory paths and the data looks like this:
But when I run an update statement where I join another table to this one and update the to existing rows in the new table, the backslashes disappear like this:
This is the update statement, where
"MIJob.SourceFile"
has the proper text containing the backslashes, and
"MIJobFileLocation.Path_Folder"
is the column being updated and does not have backslashes in its data.
This is the update statement:
UPDATE MIJobFileLocation
INNER JOIN MIJob
ON MIJobFileLocation.MIJobFileLocationGUID = MIJob.MIJobFileLocationGUID_Source
SET
MIJobFileLocation.Path_Folder = MIJob.SourceFile
WHERE MIJob.SourceFile IS NOT NULL
This SQL will run in a stored procedure in MySQL. How can I preserve the backslashes?
I’ve been googling this for hours with no success.
Thank you.
Execute this line before your update statement. Seems like a hack solution, but it works.
SET SESSION sql_mode='NO_BACKSLASH_ESCAPES'
UPDATE sometable
set.....
My Situation:
I have url's in a field containing blog posts. The url's are being stored in my database with escape characters. My task at the moment is to replace some already inserted 'http' url's with 'https' url's, but REPLACE will match neither the original url nor the escaped url. I can't just replace every instance of 'http:', because I only want to affect certain links in each post, not every link.
I am very familiar with SQL, as well as REPLACE, so I'm not just asking how REPLACE works and how to use it. Another user here has tested my queries in his environment and they work. So, there must be something in my configuration that is preventing the queries from functioning as expected.
I have searched this site and google extensively for several hours and have found nothing specifically addressing my issue. Everything I have tried is included below and if there is something else I should try, I don't know what that is and I haven't found any suggestions/posts/comments that suggest doing anything differently.
Example URL:
http://test01.mysite.com
As Stored in DB:
http:\/\/test01.mysite.com
Code to Re-Create Situation:
DROP TABLE IF EXISTS test_posts;
CREATE TABLE IF NOT EXISTS test_posts (
id int NOT NULL AUTO_INCREMENT,
post_content longtext NOT NULL,
PRIMARY KEY (id)
)
INSERT INTO
test_posts
(post_content)
VALUES
('content content content Link I want to change content content content Link I don\'t want to change content content content Link I want to change content content content Link I don\'t want to change');
If I run
UPDATE
test_posts
SET
post_content = REPLACE(post_content, 'http://test01.mysite.com', 'https://test01.mysite.com');
or
UPDATE
test_posts
SET
post_content = REPLACE(post_content, 'http:\/\/test01.mysite.com', 'https://test01.mysite.com');
zero records are affected.
For testing purposes, I ran the following query which returns 0 rows.
SELECT
*
FROM
test_posts
WHERE
post_content LIKE '%http://test01.mysite.com%'
OR
post_content LIKE '%http:\/\/test01.mysite.com%'
OR
post_content LIKE '%http:\\/\\/test01.mysite.com%'
OR
post_content LIKE 'http:%/%/test01.mysite.com%';
If I run:
SELECT
*
FROM
test_posts
WHERE
post_content LIKE '%http:_/_/test01.mysite.com%'
It does return matches, but that doesn't solve the real problem of how to match when using UPDATE/REPLACE.
I have tried on two different servers and I get the same results on both.
I have tried the following Engine/Collation combinations and all return the same 0 records results:
MyISAM/latin1_swedish_ci
MyISAM/utf8mb4_unicode_ci
InnoDB/latin1_swedish_ci
InnoDB/utf8mb4_unicode_ci
Anybody know how I can write these queries so that REPLACE will find matches to those url's or what settings in my database or PhpMyAdmin may be causing the queries to return/affect 0 rows?
I think the backslash must be escaped in MySQL
field_name LIKE 'http:\\/\\/test01.mysite.com%'
Of course one could go for sure and use the single char wildcard __
field_name LIKE 'http:_/_/test01.mysite.com%'
or for your both cases: an optional backslash:
field_name LIKE 'http:%/%/test01.mysite.com%'
I'm still baffled as to why the queries with LIKE won't work, but, sadly, using those to narrow down the problem clouded my judgement and I didn't try all the same combinations in the REPLACE functions.
The following works:
UPDATE
test_posts
SET
post_content = REPLACE(post_content, 'http:\\/\\/test01.mysite.com', 'https://test01.mysite.com');
If anyone can explain to me why these combinations work with REPLACE, but not with LIKE, I'd really love to know. Thanks!
There is no reason, your query won't work if you have run properly, there is something else, you may be missing here.
UPDATE
test1
SET
name_1 = REPLACE(name_1, 'http:\/\/test01.mysite.com', 'https://test01.mysite.com')
works well and does the job of repalcing the \/ with /.
See screen-shot attached,
You may have some other problem, please check and update the question, if so.
Edit after comments
If you have more data points in URL, change query like below.
UPDATE
test1
SET
name_1 = REPLACE(name_1, '\/', '/')
Above will replace all the occurrence of \/ with /.
As \\ did not work to represent/escape a backslash, use regular expression functions:
REGEXP_LIKE('.*http:\\/\\/test01\.mysite.com.*')
REGEXP_REPLACE(field, 'http:\\/\\/', 'http://')
Here \\ should work.
I'm almost done transferring/reconstructing a substantial mysql db for new application. Column 'website' shows 'www.example.com'. Because the new application reads it as a hyperlink, I need the column to read 'http://www.example.com'. Is there a way to add the 'http://' in the beginning of each record for that column? Thanks in advance!
You can use the CONCAT function to do that:
UPDATE tbl SET website=CONCAT('http://', website);
If you want to get cleverer and only update columns which don't already have http:// prepended, try
UPDATE tbl SET website=CONCAT('http://', website)
WHERE website NOT LIKE 'http://%';
Update
To prevent update to columns that have no site in them currently use this
UPDATE tbl SET website=CONCAT('http://', website)
WHERE website NOT LIKE 'http://%' AND website<>'';
You can use the concat command. Something like
SELECT CONCAT('http://', website) FROM table
Use concat to generate the new column:
UPDATE table1 SET website = CONCAT("http://", website);
I need to update a bunch of records in my database that store a slug in an article table. I mistakenly set the slugs to end in "-html" rather than ".html" and I need a query that will fix this.
I don't really understand how to use variables, so I'm hoping someone here can help.
Would someone please write for me a SQL query that's something like:
UPDATE table
SET table.slug = '%.html%'
WHERE table.slug LIKE '%-html%'
Obviously, that's not correct, but I don't know the correct way to write it.
Here's a quick-and-dirty example using REPLACE()
UPDATE table
SET slug = REPLACE(slug, '-html', '.html')
WHERE slug LIKE '%-html'
Just be warned that this will replace any occurrence of -html, even if it's not at the end of the string.
A more comprehensive approach might be
UPDATE table
SET slug = CONCAT(TRIM(TRAILING '-html' FROM slug), '.html')
WHERE slug LIKE '%-html'
Mine will only replace the last '-html', and append '.html'by CONCAT:
UPDATE table
SET slug = CONCAT(SUBSTRING(slug, 1, LENGTH(slug) - 5), '.html')
WHERE slug LIKE '%-html'
You have to make use of replace command.
UPDATE Table Tablename
SET MyColumnname = REPLACE(MyColumnname, '-html', '.html')
WHERE MyColumnname LIKE '%-html%'
I'd make use the the TRIM and CONCAT functions:
Something like this:
UPDATE `table` t
SET t.slug = CONCAT(TRIM(TRAILING '-html' FROM t.slug),'.html')
WHERE t.slug LIKE '%-html'
Note that the TRIM(TRAILING '-html' will remove all occurrences of that specified string from the end of the column value, so if I had (for example) a column value of 'foo-html-bar-html-html', that would return 'foo-html-bar'.
I use the CONCAT function to append '.html'.
The WHERE clause guarantees that I will only be modifying rows that have a column value ending in '-html'.
http://dev.mysql.com/doc/refman/5.5/en/string-functions.html
So I have a bunch of users in a column that get refreshed as:
Bill#test.comXYZ
Tom#test.comXYZ
John#test.comXYZ
We refresh the database each week and I need to update these appropriate emails to:
Bill#domain.com
Tom#domain.com
John#domain.com
I figured I can use concat to do the latter, but I am stuck on the former issue. Is there a way to split the values (like split Bill#test.comXYZ into Bill - #test.comXYZ and then remove the #TEXT values?).
Anyways, any help will be much appreciated.
You can use the mySQL replace function, i.e.
UPDATE mytable
set myfield = replace (myfield, '#test.comXYZ', 'domain.com')
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_replace