Device_Users
R90FDJMVAdministrator
PG04373Administrator
I only want administrator in this field what update query should I run
You can use CHARINDEX practical because you can set a starting point for the search in the string, useful if you know how long is your prefix (I have put 6 but it depends on your data)
UPDATE table
SET column = 'Administrator'
WHERE CHARINDEX('Administrator',column,6) > 0
If needed you can refine the WHERE clause to make sure you're not replacing entries which have something after Administrator
AND LEN(column) = CHARINDEX('Administrator',column,6) + LEN('Administrator')
Maybe this is good enough:
update Device_Users
set field = 'Administrator'
where field like '%Administrator'
Related
I have a column within my database that holds text similar to this
CNEWS # Trinidad : "By Any Means Necessary" Watson Duke Swims And Sails To Toco http://somewebsitehere.com
What can I do to remove the entire http address from the column? Please note that some links may be broken so it may have http:// somewebsitehere.com
I was thinking of using a substring index but not sure that would work.
You could use whichever your favorite programming language is to iterate through the rows in the table, pluck out that column, apply a regular expression replacement rule to it, then update the row in the table with the new value.
Here is some pseudo-code:
theRows = SELECT * FROM TheTable WHERE 1;
foreach row in theRows
BEGIN
oldColumnValue = row[theColumnName]
// Removes any link appearing at the end of the column
newColumnValue = oldColumnValue.replace(/http:\/\/[^\s]*$/, '')
UPDATE TheTable SET theColumnName = newColumnValue WHERE id = row[id]
END
For something as small and specific as this, you could use perl with the DBI library to connect to mySQL. Here's a useful resource on regular expressions if you want to go more into it: http://www.regular-expressions.info/perl.html
I have a column in MySQL table which has 'messy' data stored as text like this:
**SIZE**
2
2-5
6-25
2-10
26-100
48
50
I want to create a new column "RevTextSize" that rewrites the data in this column to a pre-defined range of values.
If Size=2, then "RevTextSize"= "1-5"
If Size=2-5, then "RevTextSize"= "1-5"
If Size=6-25, then "RevTextSize"="6-25"
...
This is easy to do in Excel, SPSS and other such tools, but how can I do it in the MySQL table?
You can add a column like this:
ALTER TABLE messy_data ADD revtextsize VARCHAR(30);
To populate the column:
UPDATE messy_data
SET revtextsize
= CASE
WHEN size = '2' THEN '1-5'
WHEN size = '2-5' THEN '1-5'
WHEN size = '6-25' THEN '6-25'
ELSE size
END
This is a brute-force approach, identifying each distinct value of size and specifying a replacement.
You could use another SQL statement to help you build the CASE expression
SELECT CONCAT(' WHEN size = ''',d.size,''' THEN ''',d.size,'''') AS stmt
FROM messy_data d
GROUP BY d.size
Save the result from that into your favorite SQL text editor, and hack away at the replacement values. That would speed up the creation of the CASE expression for the statement you need to run to set the revtextsize column (the first statement).
If you want to build something "smarter", that dynamically evaluates the contents of size and makes an intelligent choice, that would be more involved. If was going to do that, I'd do it in the second statement, generating the CASE expression. I'd prefer to review that, befor I run the update statement. I prefer to have the update statement doing something that's easy to understand and easy to explain what it's doing.
Use InStr() to locate "-" in your string and use SUBSTRING(str, pos, len) to get start & End number. Then Use Between clause to build your Case clause.
Hope this will help in building your solution.
Thanks
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 need to change the information in a column to Degraded, where it is Feature Broken or Degradated. Is this the correct line?
UPDATE tablename
SET column = 'Degraded'
WHERE column = 'Degradated' OR column= 'Feature Broken'
Thanks
You may want to use an IN operator, to avoid the OR:
UPDATE tablename SET columnname = 'Degraded' WHERE columnname IN ('Degradated', 'Feature Broken');
Also, I would suggest running a SELECT first so you are somewhat aware of how many rows will be changed with your command.
Yes, it is.
You could make it more concise (but it is exactly the same otherwise)
...
WHERE column IN ('Degradated','Feature Broken')
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/')