This is part C and MySQL code.
I'd like the database to change in the following ways
update table char_info, update table chars, and delete a row from table clan_info.
However for some reason it only does what the last query tells it to do.
Any way to make all 3 work?
if (curClan.treasure.debt > 3) {
sprintf(buf, "DELETE FROM clan_info WHERE clanID='%d'",i);
sprintf(buf,"UPDATE char_info SET clan='0', clan_rank='0', clan_serial='0' WHERE clan='%d'",i);
sprintf(buf,"UPDATE chars SET clan='0', clan_rank='0', clan_serial='0' WHERE clan='%d'",i);
}
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.....
I need to check phone number to see if they match but the issue is, that one table is in database A and another is in database B.
I am wondering is there away to do a search like this:
update `chk_dup`, new set chk_dup.dup='Y' WHERE chk_dup.phone = new.phone;
But I guess I would need to do something like this:
update `A.chk_dup`, B.new set A.chk_dup.dup='Y' WHERE A.chk_dup.phone = B.new.phone;
I any one knows how to search two tables in completely different databases that would help.
I think in your second one you had a syntax error, try this one:
UPDATE `A`.`chk_dup`, `B`.`new`
SET `A`.`chk_dup`.`dup`='Y'
WHERE `A`.`chk_dup`.`phone` = `B`.`new`.`phone`;
UPDATE starfsfolk
SET starfsfolk.stada=2
WHERE starfsfolk.deild LIKE '%Hugbúnaðardeild%';
UPDATE starfsfolk
SET starfsfolk.stada=3
WHERE starfsfolk.deild LIKE '%Markaðsdeild%'
is prescisely the code i'm using.
i've tried various different versions of it(like = "Markaðsdeild" or LIKE "Markaðsdeild")
most of which work if i'm using select, but i needed to use update and its not working for some reason.
This WHERE command works on select but
it returns zero rows if i'm using the update command. What am i doing wrong?
Edit:
Just to clarify, stada is set to 1 in all cases before and after the update command. it hasn't changed from 1 to 2 and 3 like i wanted it to.
Edit2: heres a screenshot of the database, i could also give you the create commands.
Edit3: Stada is bit, not int, i found out, not sure what that changes tho.
Solution: Solved myself, since bit is just 1 and 0, the error was in the creation of the table so i remade it with stada as int and now the code is working.
If the value of stada is not changed by the query then zero rows will be returned because nothing was updated.
The character sets of the server and of the client are different.
http://dev.mysql.com/doc/refman/5.5/en/charset-connection.html
I need a query that goes through each entry in a database, checks if a single value is duplicated elsewhere in the database, and if it is - deletes both entries (or all, if more than two).
Problem is the entries are URLs, up to 255 characters, with no way of identifying the row. Some existing answers on Stack Overflow do not work for me due to performance limitations, or they use uniqueid which obviously won't work when dealing with a string.
Long Version:
I have two databases containing URLs (and only URLs). One database has around 3,000 urls and the other around 1,000.
However, a large majority of the 1,000 urls were taken from the 3,000 url database. I need to merge the 1,000 into the 3,000 as new entries only.
For this, I made a third database with combined URLs from both tables, about 4,000 entries. I need to find all duplicate entries in this database and delete them (Both of them, without leaving either).
I have followed the query of a few examples on this site, but whenever I try to delete both entries it ends up deleting all the entries, or giving sql errors.
Alternatively:
I have two databases, each containing the separate database. I need to check each row from one database against the other to find any that aren't duplicates, and then add those to a third database.
Since you were looking for a SQL solution here is one. Lets assume that your table has a single column for simplicity sake. However this will work for any number of fields of course:
CREATE TABLE `allkindsofvalues` (
`value` int(11) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
The following series of queries will accomplish what you are looking for:
CREATE TABLE allkindsofvalues_temp LIKE allkindsofvalues;
INSERT INTO allkindsofvalues_temp SELECT * FROM allkindsofvalues akv1 WHERE (SELECT COUNT(*) FROM allkindsofvalues akv2 WHERE akv1.value = akv2.value) = 1;
DROP TABLE allkindsofvalues;
RENAME TABLE allkindsofvalues_temp to allkindsofvalues;
The OP wrote:
I've got my own PHP solution which is pretty hacky, but works.
I went with a PHP script to accomplish this, as I'm more familiar with PHP than MySQL.
This generates a simple list of urls that only exist in the target
database, but not both. If you have more than 7,000 entries to parse
this may take awhile, and you will need to copy/paste the results
into a text file or expand the script to store them back into a
database.
I'm just doing it manually to save time.
Note: Uses MeekroDB
<pre>
<?php
require('meekrodb.2.1.class.php');
DB::$user = 'root';
DB::$password = '';
DB::$dbName = 'testdb';
$all = DB::query('SELECT * FROM old_urls LIMIT 7000');
foreach($all as $row) {
$test = DB::query('SELECT url FROM new_urls WHERE url=%s',
$row['url']);
if (!is_array($test)) {
echo $row['url'] . "\n";
}else{
if (count($test) == 0) {
echo $row['url'] . "\n";
}
}
}
?>
</pre>
I can't find an example anywhere that doesn't give me syntax errors
My code is
BEGIN
UPDATE Room_Descriptions
IF(STRCMP(Bed_Type,'King')) THEN SET Max_People = Number_Beds * 3
END
Basically it's supposed to go through the table and look at the column "Bed_Type", if it finds the word "King" it'll multiply that row's Number_Beds by 3 and set that in the column Max_People
I was hoping to eventually get some if elses going on but I'll settle for just one if that works.
UPDATE Room_Descriptions SET Max_People = Number_Beds*3 WHERE STRCMP(Bed_Type,'King')
All it takes is a conditional UPDATE.