I'm basically looking to remove all of the text from a record called FaxOutNumber except for where it contains no... it isn't consistent in the records, so sometimes its just NO! and other times its no#emailaddress.com.
I'd like:
FaxOutNumber:
5145555#emailaddress.com
no!#emailadrress.com
to change to:
FaxOutNumber:
[null]
no
I'd actually like to just turn this field into a simple BIT where the "No" becomes a "1" or true value as well.
Thanks in advance!
You can use a regular expression:
ALTER TABLE my_table ADD COLUMN isNoRecord BOOLEAN;
UPDATE my_table SET isNoRecord = FaxOutNumber RLIKE '^no(!?)(#.+)?$';
ALTER TABLE my_table DROP COLUMN FaxOutNumber;
You can try this--
UPDATE tableName SET FaxOutNumber = IF(FaxOutNumber RLIKE '^par',"",FaxOutNumber);
Related
I have ONE column in MySQl table which contains this format:
https://open.spotify.com/track/AAABBBCCC
and I'd like to leave just AAABBBCCC, and not the entire column! The last parte is always the same.
Is that possible? Thanks and sorry for my english!
You can use SQL REPLACE function to do that.
UPDATE your_table_name
SET your_column_name = REPLACE(your_column_name, 'https://open.spotify.com/track/', '')
For more information you can read SQL statement to remove part of a string
Use REPLACE to delete the wanted text from your column:
UPDATE Table1 SET Column1 = REPLACE(Column1,'https://open.spotify.com/track/','')
I am trying to find the correct SQL query to UPDATE fields from a table that contain at least some text. My idea is something like this.
UPDATE this IN tablename WHERE fieldname = "%value%"
I know something is wrong but I am new to this and in need of some help. Thanks
INSERT statement will add new row(s) into your table.
The UPDATE statement will edit your current row(s).
You should at least shout if you want some help.
Please post something more for your question, like table name, column names and your exact requirement.
UPDATE statement is something like this:
UPDATE tablename SET field1 = 'TEST' WHERE fieldname LIKE "%value%";
I'm looking to create a new column with values that correspond with keywords in an existing column in mysql.
I'm trying to determine if a practice is private or public based on keywords in their establishment's name.
In plain english what i'm trying to get is a new column called Practice and insert value private if keywords are specialist, gleneagles.
Would appreciate any help on this matter.
If I understand what you're asking, you want to add a column to an existing table and then set that column's value (for each row) based on another column's value in that same row?
First, to create the column named Practice you can use MySQL's ALTER TABLE command:
ALTER TABLE YourTable ADD Practice VARCHAR(20);
I'm not sure what type you are aiming for here, so I'm just going with VARCHAR(20); you may also benefit from an enum based on the values you're using (or even a foreign-key to a lookup table).
After you've created your column, you can set its value:
UPDATE YourTable
SET Practice = CASE
WHEN SomeColumn = 'specialist' THEN
'private'
WHEN SomeColumn = 'gleneagles' THEN
'private'
ELSE
'public'
END
If you don't want records that don't match to be set, simply drop the ELSE 'public' and they'll be defaulted to null.
UPDATE (to select with wildcards)
If you need to update rows with the related data being contained within larger text and you need wildcards, you can use MySQL's LIKE operator:
UPDATE YourTable
SET Practice = CASE
WHEN SomeColumn LIKE '%specialist%' THEN
'private'
WHEN SomeColumn LIKE '%gleneagles%' THEN
'private'
ELSE
'public'
END
Alternatively, if you're only going to update to a single-value based on text containing multiple values, you can use a Regular Expression (via REXEXP) instead:
UPDATE YourTable
SET Practice = CASE
WHEN SomeColumn REGEXP 'specialist|gleneagles' THEN
'private'
ELSE
'public'
END
You are asking about denormalization, which means storing derived data. My initial reaction would be to not add another column, unless there were significant performance problems, instead I would create a view that gas the calculated value.
However, if you need the column, I would create a boolean column:
alter table mytable
add is_private boolean;
Then populate it like this:
update mytable
set is_private = (name like '%specialist%' or
name like '%gleneagles%')
I have a database table in MYSQL with around 1000 rows. In the table I have a column called 'overview'. In each row, this column has some value and at the end of that value I have a specific line (text) starting with: 'Source...'
Now what I want is, I want to remove this line from each column and replace it with some other text content.
I believe it can be accomplished with some smart query.
You can simply use REPLACE in your query like this
UPDATE your_table SET col_name = REPLACE(col_name , ‘Source...’, ‘new_val’)
WHERE col_name LIKE '%Source...';
Check Out the SQLFIDDLE.
MySQL database has a handy and simple string function REPLACE() that allows table data with the matching string (from_string) to be replaced by new string (to_string).
The syntax of REPLACE is:
REPLACE (text_string, from_string, to_string)
In your case, you can do this way:
UPDATE `tableName` SET `column` = REPLACE(column , 'Source...', 'Replaced Value')
Use Replace
update TBL
set overview = Replace(picture, 'Source..', 'replacement')
keep a backup of the table before anything.Or you can do it on a copy.
you can do this by following:
update table_name set col_name = replace(column_name , ‘Source...’, ‘Replaced String...’);
We are going to change something that we have an enum to an id of a linked table instead.
How would we go about that?
Our current enum name: strat
Our new linked name: stratid
What I was thinking was something along the lines of:
UPDATE table_name
SET stratid = (SELECT id FROM link_table WHERE stratname = table_name.strat);
I have not created the link table yet, right now it is all theory.
Will the above work?
Is there anything I should change in order to transfer from an enum to the linked table?
No gotchas for making the update other than that you need want to make triple sure that your link_table.ids are populated strictly in the order that table_name.strat options are defined.
For example, if strat is enum('FOO', 'BAR') then in linked_table the record with id == 1 should be the "FOO" record.
After that, you 'd perhaps want to make the stratid column NON NULL; this is not strictly equivalent to your previous arrangement, but it would probably be closer to what you want.
Yes, create the link table first,
set the stratname as unique,
use an auto increment ID
A lazy solution for insert link_table:
insert into link_table
select distinct strat from table_name order by strat;
However, I not sure is all the predefined enum is being used.
Also, without knowing size of the enum,
I can't suggest you do a manual insert.
If you look at enum ...
enum('...', '...', ...) <-- is just a comma separated value
So, here is the query to get the CSV :-
select column_type from information_schema.columns
where schema_name="table_name" and column_name = "strat";
You can combine with an programming language to do the link_table insertion.
Lastly, you UPDATE query is not very optimize, you can switch to use INNER JOIN.
But I assume is one-time job, so be it!