We have a database that has one particular table, searchdata, that has
the
following columns
BINARY key_low(5)
BINARY key_high(5)
VARCHAR searchss(255)
The following query, when the SET QUERY UTF8 option is present,
doesn't work
because MySQL encodes the binary field.
Any ideas
Ok, I thought that I will be misunderstood...
I'll try to explain this in example below:
I have table
CREATE TABLE `product_descriptions` (
`id_product_description` mediumint(8) unsigned NOT NULL auto_increment,
`id_product` mediumint(8) unsigned NOT NULL default '0',
`lang`
Now by our reconing the key of the
fields is 343 bytes, encoding in UTF8 makes that key 343 bytes Not
1000
since under utf8 each character is encode in 8 bits. If it is
converting to
utf16 internally then the key would be 328*2+5+4 which is not 1000
bytes.
If you only use the ascii
which.
Collation _can_ be set for individual columns and it sounds like that is
what you need to do. This is also important because each column index
is collation specific and you need your columns to be indexed for the
right collation.
best regards,
Jeremy March
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Hello,
I have a table with the following column among others:
text VARCHAR(120) CHARACTER SET utf8
The provider I am using however only offers MySQL version 3.23.58,
so I cannot use this statement. At first I thought I was not going
to be able to store UTF8. So I changed the column to
is
locking two tables at the same time instead of just one.
It all depends on your application and the ratio of
updates/inserts/deletes to selects as to whether this will work for you.
best,
Jeremy March
Thank you
Stuart
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was doing earlier was not correct.
SELECT hex(your_column) FROM your_table;
I usually convert utf8 to ucs2 so that I can recognize the codepoints easier.
SELECT hex(CONVERT(your_column USING ucs2)) FROM your_table;
There is also a new UNHEX() function which appeared in 4.1.2.
best,
Jeremy March
...
mysql SELECT col2 FROM test ORDER BY col2 COLLATE utf8_swedish_ci;
++
| col2 |
++
| M(u-diaresis)ller |
| Muffler|
| MX Systems |
| MySQL |
++
...
I expect M(u-diaeresis)ller to sort after MX Systems in the following:
...
I have
Could someone who has experience with handling the Unicode character
set in a MySQL database please write to me? In particular, I am
trying
to discover how in an ASCII-limited environment one can specify
non-ASCII characters; I do know their Unicode encodings, just not how
to write an
Much has changed with Unicode in MySQL 4.1.3. So you should be sure to
look at the newest bitkeeper source. And be sure to look at
strings/ctype-uca.c. This is the new implementation of the Unicode
Collation Algorithm.
best,
Jeremy March
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thing to consider is that MySQL only supports utf8 characters up
to 3 bytes long. I don't know if this is the case for chinese or not,
but if so that might be another reason to use ucs2.
good luck,
Jeremy March
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,
Jeremy March
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Is there a way (utility, command, etc...) to find out what config settings
a mysql server was started with?
For example, someone started a server and I'd like to check to make sure
the correct .cnf file was used?
Thanks.
David
e.g.
SHOW VARIABLES LIKE 'key_buffer_size%';
etc.
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Can somebody give me pointers how to store and
retrieve data in Hindi using MySQL C API and MySQL in
general. Since alll the hindi text will be in unicode
format and C API uses char* parameter how do I
interface between my Hindi text data and C API. DO I
convert them to some other format
Have you tried:
GRANT privileges ON database.* TO 'jupiter'@'192.168.6.%' IDENTIFIED BY
'sunrise';
See:
http://www.mysql.com/doc/en/GRANT.html
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Problem tested using both version 4.0.18 and 4.1.1
This query gets first byte of utf8 character, not two bytes
If I use
SELECT LEFT(FieldName, 2) AS FirstLetter, COUNT(*) FROM TableName GROUP BY
FirstLetter
gets right utf8 characters but others wrong
for example;
Hi,
I need this query;
SELECT LEFT(FieldName, 1) AS FirstLetter, COUNT(*) FROM TableName
GROUP BY FirstLetter
my datas in utf8 format. I can't get first characters of the datas in
utf8 format but others is ok.
Any suggestion?
Thank you
It works for me. I'm using the development
Can anyone tell me how to sort the combined results of a Union query?
(Select Name From Employee Group By Name Order By Name)
Union (Select Name From Consultant Group By Name Order By Name);
Just add another order by on the end after the parenthesis:
(Select Name From Employee Group By
UPDATE Table SET CounterValue = CounterValue+1, CounterStartDateTime =
(IF CounterStartDateTime IS NULL, Now())
without success.
It looks like you just have the syntax wrong. Try:
UPDATE Table SET CounterValue = CounterValue+1, CounterStartDateTime =
IF(CounterStartDateTime IS NULL,
But when I do a select for specifcly word like sao, I get all the three !!!
Internally MySQL isn't distinguing the different words, assuming that = A,
and O = .
I don't think MySQL has a Portuguese collation yet. You could try one
of the other collations to see if its compatible with
What client are you using to connect to the server?
If its MyODBC 3.51 then that is your problem. It doesn't support
unicode yet.
If you are using the mysql command line client try select
Hex(your_column) from your_table; to see if the proper hex values are
being inserted into the table.
What I am trying to do is to enter a genome sequence which has around
175 characters. the file size is about 1.5MB which is well within
the longblob size. I am using python to enter the sequence from a file
to the database and the while i am running the python program ,the
connection to
I didn't key the placename because they're not guaranteed to be
unique, but that means that a search for Artesia takes many (~30)
seconds to complete, which is really not very useful.
You should not use the placename as a PRIMARY KEY, but it can still have
an index. You really should add a
in which table i set to use Charset (UTF-8).
But When i use mysqlmysqldump -u myname -p mypwd telbookbook.txt, all
string of table friend's c_name will become ?.
Have you tried:
mysqldump --default-character-set=utf8 -u myname -p mypwd telbookbook.txt
If that doesn't work, which version
I think --with-extra-charsets=none means that no additional character
sets will be _compiled_ into the server. Complex character sets must be
compiled into MySQL, but simple ones can be loaded dynamically. I think
the character sets you are seeing are ones that can be loaded
dynamically. For
http://www.mysql.com/doc/en/UPDATE.html
I believe multi-table updates weren't supported until MySQL version
4.04. Are you using a version earlier than this?
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I tried this and doesn't work unforunately. I get ERROR: Duplicate
entry... that occurs when copying from the temporary table back into
the original table.
Is there a way to do this, to copy a single record, without moving the
primary key into the temporary table so I can avoid this
It sounds like you are using the mysql client to display your queries.
You should do:
SELECT HEX(arabic_column) FROM your_table;
to really see what characters are stored in the table. To see the
unicode codepoints you can do this:
SELECT HEX(CONVERT(arabic_column USING ucs2)) FROM
but can I set multiple default character set options to
multiple character sets (EUC-JP, EUC-KR, and ISO-8859-1) rather then just
one.
No, just one in 4.0.x. You have to use 4.1.x for multiple character sets.
_
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No. With the method you're using (storing the parent id with each record)
you have to use a recursive series of queries to show the subtree levels.
Take a look at this article--especially the second and third pages about the
modified preorder tree traversal and nested sets. There are many
The first things you should check:
1. Do \s from the mysql client to be sure its using the character set you
told it to use with default-character-set=latin1. Be sure its the same one
you used on your old server.
2. Since you have the Norwegian keyboard set up try typing Norwegian
characters
Why don't you want to use an ORDER BY? I think its the _only_ way to get a
stable order. It sounds like you want to retrieve your rows in the order in
which they were entered. If you don't want an auto_increment field you
could order by a timestamp.
In the Certification section of the mysql web site there is a short sample
test which shows the types of questions. There's a lot of information there
too including the broad topics covered in each test. According to
amazon.com Paul Dubois will have a MySQL Certification study book coming out
Try this:
mysql set @@session.sql_mode = 'ansi';
Query OK, 0 rows affected (0.00 sec)
mysql select @@session.sql_mode;
++
| @@session.sql_mode
|
Can I create a php script like:
No. Try this:
$privSQL = SHOW GRANTS FOR 'paul'@'localhost';;
$priv_result = mysql_query($privSQL) or die(Couldn't Select Priv);
while($myrow = mysql_fetch_row($priv_result))
{
echo $myrow[0]br;
}
I believe this only returns a single row with the grant
MySQL doesn't support unicode until version 4.1.0. If this isn't a
production server I suggest you upgrade to MySQL 4.1.1. Its still in the
ALPHA stage but it is pretty stable. I use it every day and I don't have
any problems with it.
Good luck,
Jeremy
MySQL doesn't support unicode until version 4.1.0. If this isn't a
production server I suggest you upgrade to MySQL 4.1.1. Its still in the
ALPHA stage but it is pretty stable. I use it every day and I don't have
any problems with it.
Good luck,
Jeremy
Unicode and multiple character sets are not supported until version 4.10.
See section 9 of the manual. 4.1.1 is still alpha but its quite stable if
your server isn't in a production environment.
_
Tired of slow downloads? Compare
I don't know what's wrong from your description, but here are some things to
watch out for:
Are BOTH the client and server using utf8?
Is the client application using a unicode font that supports the characters
you're using? Most fonts only support a subset of unicode characters.
Are you
What language are you using? It's not clear from your example what language
you're using (no $s, but you also forgot to increment your array so?), so
I'll give you an example in PHP:
$query_string = implode( OR name = , $yourarray);
mysql_query(UPDATE users SET status = no WHERE name =
You should check the error log about why the server didn't start. It should be called
yourhostname.err in your data directory. I think the problem is that you put spaces
around the second equal sign. The first equal sign set-variable = ... can be
surrounded by spaces but the second one ...
I don't think you can use alter table to change character sets in version 3.23.51.
You must do it at the server level. Try starting mysql with this command line option:
--default-character-set=hebrew
Hope this helps.
Jeremy
Using CASE... WHEN... THEN in my update query doesn't behave the way I
expect it to. It's using the result of the query in the second WHEN
condition rather than the original value. See this example:
CREATE TABLE t1 (col_a tinyint not null, col_b tinyint not null);
INSERT INTO t1 VALUES
What command do I use to change the field type in my client_info table
from:
referral_percent | tinyint(4) | YES | NULL
to
referral_percent | double(3,2) unsigned zerofill | YES | NULL
ALTER TABLE yourtable CHANGE referral_percent referral_percent double(3,2)
unsigned zerofill default null;
I don't think you can do what you want in one query if you use the adjacency
list tree model (i.e. a self join to the parent node). See the article
below comparing the adjacency list and the modified preorder tree traversal:
http://www.sitepoint.com/article/1105
I'm not sure if that is what
You need to be sure you are using a Unicode font. Are you using xterm? If
so you can go to the edit tab and click Current Profile to change the font.
Also note that most Unicode fonts only cover subsets of Unicode not the
whole thing so use a font that supports the language you are using. I
Oops--the Unicode character must have gotten lost in the email, but it does
show up in MySQL. Its an O with a line above it.
_
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,
Jeremy March
_
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the character with its utf8 hexidecimal:
SELECT hex(my_column), my_column FROM your_table;
Hope this helps,
Jeremy March
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the simple LIKE function--could
that be the problem? LIKE works correctly (case insensitive) for the Latin unicode
range, I assume because it isn't multibyte.
Has anyone else experienced this with multibyte utf8?
Thanks,
Jeremy March
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