I'm trying to update a column used for email in my database with the site id for the same row..
I've tried the following:
UPDATE LOCATIONS
SET email ='se".site_id."#myemail.com'
WHERE customer='MyCustomer' AND site_id='5555';
expecting the email column to be se5555 at myemail.com
but that wasn't the case. Should I use CONCAT?
Use concat function of mysql like this:
UPDATE LOCATIONS SET email = concat('se',site_id,'#myemail.com') WHERE
customer='MyCustomer' AND site_id='5555';
You can definitely use concat(). I also like to use replace() for this type of operation:
UPDATE LOCATIONS
SET email = replace('se<site_id>#myemail.com', '<site_id>', site_id)
WHERE customer = 'MyCustomer' AND site_id = '5555';
This is helpful when you have multiple substitutions -- the first argument is a template so it is easier to see what you are doing and to modify.
Related
What I'm working on is an email clean up script for our database. In so doing we identified a list of domains that are invalid, broken or no longer around. We do this by identifying the domain name i.e. everything after the # sign.
update url_links
set link_bad=1,
emailCarrier='bad-domain.com'
where contact_email like '%#bad-domain.com';
identifies the provider and sets the field. The problem is we have hundreds of domains that are not valid (the above is just an example)
What I'd like to do is 'inner join' to another table that is called 'emailCarriers. I could write this as a loop in PHP but I wanted to ask the community here if someone had a clever way to do this in MySQL.
The emailCarriers table contains all the bad domain carriers so the query would reference the emailCarriers table and seek to find a match on the substring of the domain name portion (after the # sign) and if its a match then it would perform the update and fill in the 'bad-domain.com' with the corresponding domain from the emailCarriers table.
Thanks!
update url_links ul
join emailCarriers ec on ul.contact_email like concat('%#', ec.domain)
set ul.link_bad=1,
ul.emailCarrier=ec.domain;
You can try something like this:-
UPDATE url_links u JOIN emailCarrier e
ON u.SUBSTRING_INDEX(url_links, '#', 1) = b.provider
SET link_bad = 1
I have VB.net website. Somewhere I have used Update Query which has no errors in terms of syntax but suppose If user has selected some symbolic values like below
UPDATE Table SET Column = ''A'-wing' Where ID = '123'
So here in column the value 'A'-wing has quote which result to syntax error in my query. How do I avoid users option related error in query?
You have to escape your quotes by adding a backslash in front of them. Change your query to this:
UPDATE Table SET Column = '\'A\'-wing' Where ID = '123'
For more informations about this, check the official documentation here.
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
I want to update a mysql row, but I do not want to specify all the column names.
The table has 9 rows and I always want to update the last 7 rows in the right order.
These are the Fields
id
projectid
fangate
home
thanks
overview
winner
modules.wallPost
modules.overviewParticipant
Is there any way I can update the last few records without specifying their names?
With an INSERT statement this can be done pretty easily by doing this:
INSERT INTO `settings`
VALUES (NULL, ...field values...)
So I was hoping I could do something like this:
UPDATE `settings`
VALUES (NULL, ...field values...)
WHERE ...statement...
But unfortunately that doesn't work.
If the two first columns make up the primary key (or a unique index) you could use replace
So basically instead of writing
UPDATE settings
SET fangate = $fangate,
home = $home,
thanks = $thanks
overview = $overview,
winner = $winner,
modules.wallPost = $modules.wallPost,
modules.overviewParticipant = $modules.overviewParticipant
WHERE id = $id AND procjectId = $projectId
You will write
REPLACE INTO settings
VALUES ($id,
$projectId,
$fangate,
$home,
$thanks
$overview,
$winner,
$modules.wallPost,
$modules.overviewParticipant)
Of course this only works if the row already exist, otherwise it will be created. Also, it will cause a DELETE and an INSERT behind the scene, if that matters.
You can't. You always have to specify the column names, because UPDATE doesn't edit a whole row, it edits specified columns.
Here's a link with the UPDATE syntax:
http://dev.mysql.com/doc/refman/5.0/en/update.html
No, it works on the INSERT because even if you didn't specify the column name but you have supplied all values in the VALUE clause. Now, in UPDATE, you need to specify which column name will the value be associated.
UPDATE syntax requires the column names that will be modified.
Are you always updating the same table and columns?
In that case one way would be to define a stored procedure in your schema.
That way you could just do:
CALL update_settings(id, projectid, values_of_last_7 ..);
Although you would have to create the procedure, check the Mysql web pages for how to do this, eg:
http://docs.oracle.com/cd/E17952_01/refman-5.0-en/create-procedure.html
I'm afraid you can't afford not specifying the column names.
You can refer to the update documentation here.
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/')