utf8mb4

问题 I'm using Spring boot and I can't store emojis in database. I don't have access to my.cnf file. What I've done so far is: ALTER DATABASE name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; For each table: ALTER TABLE table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; For each column: ALTER TABLE table CHANGE column column VARCHAR(190) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; In application.properties file I'm using this: spring.datasource.url = jdbc:mysql:/

问题 I'm using Spring boot and I can't store emojis in database. I don't have access to my.cnf file. What I've done so far is: ALTER DATABASE name CHARACTER SET = utf8mb4 COLLATE = utf8mb4_unicode_ci; For each table: ALTER TABLE table CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; For each column: ALTER TABLE table CHANGE column column VARCHAR(190) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci; In application.properties file I'm using this: spring.datasource.url = jdbc:mysql:/

问题 I'm trying to import a CVS file where I get this warning: 1366 Incorrect string value: '\x96 PART...' for column I read somewhere that this is about the 4-bit utf8 characters. But changing the collation of the table and column into utf8mb4 didn't work either. 回答1: The hex 96 is presumably the latin1 encoding for an en-dash ( – ). But you have specified that the CSV file is utf8-encoded (or utf8mb4), this character is incomprehensible to utf8. Plan A: Change the file. (This is probably not

问题 I'm trying to import a CVS file where I get this warning: 1366 Incorrect string value: '\x96 PART...' for column I read somewhere that this is about the 4-bit utf8 characters. But changing the collation of the table and column into utf8mb4 didn't work either. 回答1: The hex 96 is presumably the latin1 encoding for an en-dash ( – ). But you have specified that the CSV file is utf8-encoded (or utf8mb4), this character is incomprehensible to utf8. Plan A: Change the file. (This is probably not

问题 I changed my mysql database to utf-8 mb4, so that users could enter smileys from their mobile phones / mac. It works (users can enter smileys and those smileys are shown in the web app on supported devices), but whenever I have a look at the table contents (via terminal or mysql workbench) it shows each smiley as a single question mark. How exactly are those smileys saved? I assume they got a utf-8 mb4 code, but is there any way to look at those? Thanks! 回答1: I suspect Workbench is running in

来源： https://stackoverflow.com/questions/64231720/how-to-avoid-invalid-errors-when-comparing-integers-with-explicit-collation-in-m

问题 I am aware that similar questions have been asked before, but we need a more definitive answer. Is it safe to update MySQL tables encoded in utf8 to utf8mb4 in all cases . More specifically, even for varchar fields with strings generated using for example (in Java): new BigInteger(130, random).toString(32) From our understanding utf8mb4 is a superset of utf8 so our assumption would be that everything should be fine, but we would love some input from more MySQL superusers. 回答1: How the data

问题 Well i got a php script that takes nicknames from a the Steam web-api and insert them into a mysql db. Many of them got rare russian and greek characters. I set php to utf-8 in the php.ini and in all the php files with mb_internal_encoding('utf-8'); My PDO connector is configured to handle utf8 $connection = new PDO('mysql:host=localhost;dbname=d2bd;mysql:charset=utf8mb4', 'root', ''); $connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $connection->setAttribute(PDO::ATTR_ERRMODE,

问题 Well i got a php script that takes nicknames from a the Steam web-api and insert them into a mysql db. Many of them got rare russian and greek characters. I set php to utf-8 in the php.ini and in all the php files with mb_internal_encoding('utf-8'); My PDO connector is configured to handle utf8 $connection = new PDO('mysql:host=localhost;dbname=d2bd;mysql:charset=utf8mb4', 'root', ''); $connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $connection->setAttribute(PDO::ATTR_ERRMODE,

问题 Well i got a php script that takes nicknames from a the Steam web-api and insert them into a mysql db. Many of them got rare russian and greek characters. I set php to utf-8 in the php.ini and in all the php files with mb_internal_encoding('utf-8'); My PDO connector is configured to handle utf8 $connection = new PDO('mysql:host=localhost;dbname=d2bd;mysql:charset=utf8mb4', 'root', ''); $connection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $connection->setAttribute(PDO::ATTR_ERRMODE,