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In PHP 5.3, the default client library for interacting with MySQL databases changed from libmysql to mysqlnd, which would appear to be the cause of the issue we are encountering.
We tested the strings before display with mb_detect_encoding in strict mode as well as mb_check_encoding and were told the string was a UTF-8 string before displaying it. Ideally, we would like to resolve this issue without upgrading MySQL on our production servers unless we can verify the exact reason why this isn't working and why the upgrade will fix it. If you have made sure that both the tables, and the output encoding are UTF-8, almost the only thing left is the connection encoding. However, I can't see any changes in the default encoding between versions, so if those were brand-new installs, I can't see that happening.
Yeah, we're just supplying the optional second parameter to provide the connection (see docs. Not the answer you're looking for?Browse other questions tagged php mysql character-encoding or ask your own question. Database Administrators Stack Exchange is a question and answer site for database professionals who wish to improve their database skills and learn from others in the community. Not the answer you're looking for?Browse other questions tagged mysql character-set or ask your own question. If time travel is possible in the future, no matter how distant, why haven't they come back to tell us?
Just in case anyone stumbles upon this; you can't create a table with a relation to a table that's not created yet.
When MySQL creates a relation it links the table you're creating the relation for to the table you're referencing, if the referencing table doesn't exist, MySQL won't be happy about it.


So when creating a lot of tables that reference each other, make sure that any table that is referenced by another is created before the table that references it.
Not the answer you're looking for?Browse other questions tagged mysql database database-design eer-model or ask your own question. Me: Ravi, we are supposed to obtain an XML file which contains the metadata required to create a PDB. We should check the compatibility of this non-CDB on our CDB cdb12ct with the XML file that we have. Convert the character set of the PDB to match the CDB or plug the PDB in a CDB with a compatible character set. So we have successfully converted the character set of our pluggable database to fit with the container. Connecting to the database via the command-line client and running queries confirms that the data is intact and encoded properly. We also used mysql_client_encoding to test the client encoding and it also indicates the character set is UTF-8.
After that upgrade, everything displayed correctly when we connected to our development database. I have updated the question with a screenshot of the response headers as reported by Firebug. I tried it your way just for kicks (with the lowercase UTF and double quotes as well) and the results were the same: garbled text.
I have attached an image to the step 5 (Modify connection, client, and server character sets) of the above tutorial.


We do this because when we plug a database into some other container, the compatibility will decide for the possibility of plugging in. We have a CDB with a character set AL32UTF8 which is the recommended character set for any new CDB creation and we are trying to plug in a PDB with an incompatible character set. However, when we query the database in PHP and try to display the exact same data, it becomes garbled.
However, Ravi still has his target pending which was to attach this orcl non-CDB to an already existing CDB (cdb12ct) as a PDB.
The action suggested asks us to either create a new CDB in the same character set (which may be the case in several business needs where we are not supposed to change the character set of our database) or change the character set of our database to make it compatible to the CDB character set.
The COLLATE clause specifies the default database collation.A character set is a set of symbols and encodings. Refer this link, for more info charsets and collations.The MySQL server can support multiple character sets.
To list the available character sets, use the SHOW CHARACTER SET statement.Any given character set always has at least one collation. To list the collations for a character set, use the SHOW COLLATION statement.SHOW DATABASE statement shows all databases in your database server.



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