Introduce three ways to view MySQL character set
MySQL character set Settings
System variable:
-character_set_server: default internal operation character set
-character_set_client: the character set used by the client source data
-character_set_connection: connection layer character set
-character_set_results: query result character set
-character_set_database: the default character set of the currently selected database
-character_set_system: system metadata (field name, etc.) character set
-there are also variables starting with collation_ that correspond to the above to describe the character order.
Log in to the MySQL database:
C:\ Users\ duansf > mysql-u root-p
Enter password: *
Welcome to the MySQL monitor. Commands end with; or\ g.
Your MySQL connection id is 4
Server version: 5.5.13 MySQL Community Server (GPL)
Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
Affiliates. Other names may be trademarks of their respective
Owners.
Type 'help;' or'\ h' for help. Type'\ c'to clear the current input statement.
Mysql >
one。 View the character set of the MySQL database server and database MySQL:
Mysql > show variables like'% char%'
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| | Variable_name | Value |
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| | character_set_client | utf8 |
| | character_set_connection | utf8 |
| | character_set_database | gbk |
| | character_set_filesystem | binary |
| | character_set_results | utf8 |
| | character_set_server | utf8 |
| | character_set_system | utf8 |
| | character_sets_dir | C:\ Program Files (x86)\ MySQL\ MySQL Server 5.5\ share\ charsets\ | |
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8 rows in set (0.00 sec)
two。 View the MySQL character set of the MySQL data Table (table):
Mysql > use test
Database changed
Mysql > show table status from test like'% work%'
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-+-
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| | Name | Engine | Version | Row_format | Rows | Avg_row_length | Data_length | Max_data_length |
Index_length | Data_free | Auto_increment | Create_time | Update_time | Check_time | Collat
Ion | Checksum | Create_options | Comment |
+-+ +
-+-
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| | workinfo | InnoDB | 10 | Compact | 1 | 16384 | 16384 | 0 | |
32768 | 9437184 | 4 | 2016-03-07 16:13:51 | NULL | NULL | utf8_g
Eneral_ci | NULL |
+-+ +
-+-
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1 row in set (0.00 sec)
three。 View the MySQL character set of the MySQL data column (column):
Mysql > show full columns from workinfo
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| | Field | Type | Collation | Null | Key | Default | Extra | Privileges |
| | Comment |
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| | id | int (10) | NULL | NO | PRI | NULL | auto_increment | select,insert,u |
Pdate,references | |
| | name | varchar (20) | utf8_general_ci | NO | | NULL | | select,insert,u |
Pdate,references | |
| | type | varchar (10) | utf8_general_ci | YES | | NULL | | select,insert,u |
Pdate,references | |
| | address | varchar (50) | utf8_general_ci | YES | | NULL | | select,insert,u |
Pdate,references | |
| | tel | varchar (20) | utf8_general_ci | YES | | NULL | | select,insert,u |
Pdate,references | |
| | wages | int (11) | NULL | YES | | NULL | | select,insert,u |
Pdate,references | |
| | contents | tinytext | utf8_general_ci | YES | | NULL | | select,insert,u |
Pdate,references | |
| | extra | text | utf8_general_ci | YES | | NULL | | select,insert,u |
Pdate,references | |
+-
-+
8 rows in set (0.02 sec)
How to solve the mismatch of character set communication settings:
(modify the default character_set_client,character_set_connection,character_set_result)
1. Recompile mysql and php,mysql with the compilation parameter-default-character-set=utf8
2. The PHP program executes mysql_query ("set names utf8;") before querying the database
3. Modify my.cnf and add init-connect= "set names utf8" to [mysqld] (this option is not valid for super user connections)
4. Start mysqld join parameter-skip-character-set-client-handshake ignores client character set
