I have a table that has some rogue tags that need replacing
The offending string ends <tr> and needs replacing with </table>
Not all record are affected, so I need to find these and then replace them
Our skills using Update Replace Where are limited as the characters are not unique within the string but their position is, ie the last 4 characters
Have tried using
UPDATE table
SET field
REPLACE (RIGHT(field,4),</table>)
but suspec this is over simplified (and also fails)
try this:
UPDATE table
SET field=concat(left(field,length(field) -4),'</table>')
I had a similar situation in which needed to replace '_' from end of the transaction number field, where there where more than one occurrences of _ in field. Example: 20161124_C_BGN_5570.77_ & 20161121_C_HRK_1502360000__
Solution:
UPDATE temp
SET transaction = LEFT(transaction, LENGTH(transaction) -1)
WHERE RIGHT(transaction, 1) = '_';
// in case of double underscore (__)
UPDATE temp
SET transaction = LEFT(transaction, LENGTH(transaction) -2) # WHERE id = xxx WHERE RIGHT(transaction, 2) = '__';
Related
I need to update values in a table by removing their last char if they ends with a +
Example:
John+Doe and John+Doe+ should both become John+Doe.
What's the best way to achieve this?
UPDATE table
SET field = SUBSTRING(field, 1, CHAR_LENGTH(field) - 1)
WHERE field LIKE '%+'
If you are trying to display the field instead of update the table, then you can use a CASE statement:
select
case
when right(yourfield,1) = '+' then left(yourfield,length(yourfield)-1)
else yourfield end
from yourtable
SQL Fiddle Demo
you didn't explain exactly the situation.
but if you search for names in a text. I'll remove all the non chars (anything not a-z and A-Z) including spaces and then compare.
if you want just the last char, try the SUBSTRING_INDEX function.
if you are passing to the DB as a string, you can do this with str_replace
<?php
$str = "John+Doe+";
$str = str_replace("+"," ",$str);
echo $str;
?>
I have a string like this in my column:
<p>[img ret872154ftu] fileaddress [/img ret872154ftu]</p>
<p>[img fd68721cvn] fileaddress [/img fd68721cvn]</p>
<p>[img xdfh654t] fileaddress [/img xdfh654t]</p>
Now i wish to remove unwanted chars inside [img] and [/img].
I have already used this query but does not work:
UPDATE `table` SET `content` = replace(`content`, '[img [^]*]', '[img]');
Any suggestion?
UPDATE table SET
column=REPLACE(column,SUBSTRING_INDEX(SUBSTRING_INDEX(column,'/img ',-1),']',1),'');
UPDATE table SET
column=REPLACE(column,SUBSTRING_INDEX(SUBSTRING_INDEX(column,'[img ',-1),']',1),'');
SQL Fiddle
2 updates,with different delimiters because the texts might be different.
In FoxPro using native table, I usually do this when inserting new Data.
Sele Table
If Seek(lcIndex)
Update Record
Else
Insert New Record
EndIf
If I will use MYSQL as my DataBase, what is the best and fastest way to
do this in FoxPro code using SPT? I will be updating a large number of records.
Up to 80,000 transactions.
Thanks,
Herbert
I would only take what Jerry supplied one step further. When trying to deal with any insert, update, delete with SQL pass through, it can run into terrible debugging problems based on similar principles of SQL-injection.
What if your "myValue" field had a single quote, double quote, double hyphen (indicating comment)? You would be hosed.
Parameterize your statement such as using VFP variable references, then use "?" in your sql statement to qualify which "value" should be used. VFP properly passes. This also helps on data types, such as converting numbers into string when building the "myStatement".
Also, in VFP, you can use TEXT/ENDTEXT to simplify the readability of the commands
lcSomeStringVariable = "My Test Value"
lnANumericValue = 12.34
lnMyIDKey = 389
TEXT to lcSQLCmd NOSHOW PRETEXT 1+2+8
update [YourSchems].[YourTable]
set SomeTextField = ?lcSomeStringVariable,
SomeNumberField = ?lnANumericValue
where
YourPKColumn = ?lnMyIDKey
ENDTEXT
=sqlexec( yourHandle, lcSQLCmd, "localCursor" )
You can use SQL Pass through in your Visual Foxpro application. Take a look at the SQLCONNECT() or SQLSTRINGCONNECT() for connecting to your Database. Also look at SQLEXEC() for executing your SQL statement.
For Example:
myValue = 'Test'
myHandle = SQLCONNECT('sqlDBAddress','MyUserId','MyPassword')
myStatement = "UPDATE [MySchema].[Mytable] SET myField = '" + myValue + "' WHERE myPk = 1"
=SQLEXEC(myHandle, myStatement,"myCursor")
=SQLEXEC(myHandle, "SELECT * FROM [MySchema].[Mytable] WHERE myPk = 1","myCursor")
SELECT myCursor
BROWSE LAST NORMAL
This would be your statement string for SQLEXEC:
INSERT INTO SOMETABLE
SET KEYFIELD = ?M.KEYFIELD,
FIELD1 = ?M.FIELD1
...
FIELDN = ?M.FIELDN
ON DUPLICATE KEY UPDATE
FIELD1 = ?M.FIELD1
...
FIELDN = ?M.FIELDN
Notice that the ON DUPLICATE KEY UPDATE part does not contain the key field, otherwise it would normally be identical to the insert (or not, if you want to do something else when the record already exists)
I have a database that has stored values in a complicated, serialized array where one component is a string and another is the length of the characters of the string, in this format:
s:8:"test.com"
Where "s" holds the character length of the string in the quotations.
I would like to change the string from "test.com" to "testt.com", and I'm using the following statement in SQL:
UPDATE table SET row=(REPLACE (row, 'test.com','testt.com'))
However, this breaks the script in question, because it doesn't update the character length in the "s" preceding the string where "test.com" is stored.
I was wondering if there is a query I can use that would replace the string, and then also increment the value of this "s" preceding to where the replacement occurs, something like this:
UPDATE table SET row=(REPLACE (row, 's:' number 'test.com','s:' number+1 'testt.com'))
Does anyone know if this kind of query is even possible?
UPDATE table set row = concat('s:',length('testt.com'),':"testt.com"');
If you need to change exact string, then use exact query -
UPDATE table SET row = 's:9:"testt.com"' WHERE row = 's:8:"test.com"';
The string is a "serialized string".
If there are multiple strings to be replaced, it might be easier to create a script to handle this.
In PHP, it goes something like this:
$searchfor = serialize('test.com');
$replaceby = serialize('testt.com');
// strip last semicolon from serialized string
$searchfor = trim($searchfor,';');
$replaceby = trim($replaceby,';');
$query = "UPDATE table SET field = '$replaceby' WHERE field = '$searchfor';";
This way, you can create an exact query string with what you need.
Do fill in the proper code for db connection if necessary.
Hi is it possible to cut string like this:
String in "data" columns: ,123,456
Cut the first character i.e "," (comma).
So the query is something like:
Update users set data = cut first string...
UPDATE users SET data = SUBSTR(data, 2);
This will iterate through all rows in users and replace data with itself minus the first character.