Can someone please tell me a character set in MySQL which is similar to the Oracle's default character set "WE8MSWIN1252" ?
Please note that it should be also a case-sensitive character set. Thanks in advance.
As the name implies, WE8MSWIN1252 is based on Microsoft Windows 1252. So is MySQL's latin1 character set. So: latin1 is similar. There is no such thing as a "case-sensitive character set", but you can pick a case-sensitive collation for latin1, such as latin1_bin.
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When i dump mysql data out , some data has changed because of the character_set_system which is UTF8.Server , client and connection character sete are utf8mb4.
I guess the problem is system character set and server character set differences.
I am trying to change system caharacter set from UTF8 to utf8mb4 with this
Change MySQL default character set to UTF-8 in my.cnf?
But i can not
The title is incorrectly phrased.
"utf8" is a "character set"
"utf8_bin" is a "collation" for the character set utf8.
You cannot change character_set... to collation. You may be able to set some of the collation_% entries to utf8_bin.
But none of that a valid solution for the problem you proceed to discuss.
Probably you can find more tips here: Trouble with UTF-8 characters; what I see is not what I stored
To help you further, we need to see the symptoms that got you started down this wrong path.
I am unable to find the exact solution for MySQL
The thing is the column supports by default UTF-8 encoding which consists of 3 bytes. The Indian Rupee Symbol, since it is new has a 4 byte encoding. So we have to change the character encoding to utf8_general_ci by,
ALTER TABLE test_tb MODIFY COLUMN col VARCHAR(255)
CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL;
After executing the above query simply execute the following query to insert the symbol,
insert into test_tb values("₹");
Ta-Da!!!
You are talking Oracle, yet it is tagged MySQL. Which do you want? And what language and/or client tool are you using?
Copy and paste it. Which Rupee do you like? ৲ ৳ ૱ ௹ ₨ ꠸
Probably you want this one:
UNHEX('E282A8') = '₨'
which is U+20A8 or 8360 in non-MySQL contexts
You need to have CHARACTER SET utf8 on the table/column.
You need to have done SET NAMES utf8 (or equivalent) when connecting.
Simplest way to do it is, utf8mb4 stores all the symbols
ALTER TABLE AsinBuyBox CONVERT TO CHARACTER SET utf8mb4;
I have problem with MySQL charset.
Here is how it should look.
(https://ctrlv.cz/2VV2)
And here is what I get from db
(https://ctrlv.cz/E7w6)
So which charset I should use? I try utf8, utf8mb4...
Cheers
Mojibake. This is the classic case of
The bytes you have in the client are correctly encoded in utf8 (good).
You connected with SET NAMES latin1 (or set_charset('latin1') or ...), probably by default. (It should have been utf8.)
The column in the tables may or may not have been CHARACTER SET utf8, but it should have been that.
Conversion:
CONVERT(CONVERT(BINARY('★') USING latin1) USING utf8) = '★'
I have problem inserting rows to my DB.
When a row contains characters like: 'è', 'ò', 'ò', '€', '²', '³' .... etc ... it returns an error like this (charset set to utf8):
Incorrect string value: '\xE8 pass...' for column 'descrizione' at row 1 - INSERT INTO materiali.listino (codice,costruttore,descrizione,famiglia) VALUES ('E 251-230','Abb','Relè passo passo','Relè');
But, if I set the charset to latin1 or *utf8_general_ci* it works fine, and no errors are found.
Can somebody explain me why does this happens? I always thought that utf8 was "larger" than latin1
EDIT: I also tried to use mysql_real_escape_string, but the error was always the same!!!!
mysql_real_escape_string() is not relevant, as it merely escapes string termination quotes that would otherwise enable an attacker to inject SQL.
utf8 is indeed "larger" than latin1 insofar as it is capable of representing a superset of the latter's characters. However, not every byte-sequence represents valid utf8 characters; whereas every possibly byte sequence does represent valid latin1 characters.
Therefore, if MySQL receives a byte sequence it expects to be utf8 (but which isn't), some characters could well trigger this "incorrect string value" error; whereas if it expects the bytes to be latin1 (even if they're not), they will be accepted - but incorrect data may be stored in the table.
Your problem is almost certainly that your connection character set does not match the encoding in which your application is sending its strings. Use the SET NAMES statement to change the current connection's character set, e.g. SET NAMES 'utf8' if your application is sending strings encoded as UTF-8.
Read about connection character sets for more information.
As an aside, utf8_general_ci is not a character set: it's a collation for the utf8 character set. The manual explains:
A character set is a set of symbols and encodings. A collation is a set of rules for comparing characters in a character set.
According to the doc for UTF-8, the default collation is utf8_general_ci.
If you want a specific order in your alphabet that is not the general_ci one, you should pick one of the utf8_* collation that are provided for the utf8 charset, whichever match your requirements in term of ordering.
Both your table and your connection to the DB should be encoded in utf8, preferably the same collation, read more about setting connection collation.
To be completely safe you should check your table collation and make sure it's utf8_* and that your connection is too, using the complete syntax of SET NAMES
SET NAMES 'utf8' COLLATE 'utf8_general_ci'
You can find information about the different collation here
mysql_query("SET NAMES 'utf8' COLLATE 'utf8_general_ci'");
Eurika, the above did it :-)
I need to interface with a database for which I cannot change the collation and charset.
However, I would like to pick some binary data from it, interpret it as if it were UTF8 and then do an UPPER on it (since just doing UPPER() on binary returns the raw value).
I would assume that this works:
SELECT UPPER(Filename.Name) COLLATE utf8_general_ci FROM Filename;
but it doesn't and complains that
COLLATION 'utf8_general_ci' is not valid for CHARACTER SET 'binary'
which is fair enough, I need some incantation to cast the binary field as being utf-8. How do I do a select which gives me a computed column with the right character set assigned to it?
Ok figured it out. For modern MySQL versions you can use CAST, and for older ones CONVERT (which is actually standard SQL).
SELECT UPPER(CONVERT(BINARY(Filename.Name) USING utf8)) FROM Filename;
I think you're looking for:
SELECT UPPER(Filename.Name COLLATE utf8_general_ci) FROM Filename;
But I'm not sure because I don't have a broken database to test with.