utf8乱码问题

1、创建数据库的时候：

CREATE DATABASE `test`

CHARACTER SET 'utf8'

COLLATE 'utf8_general_ci';

2、建表的时候

CREATE TABLE `database_user` (

`ID` varchar(40) NOT NULL default '',

`UserID` varchar(40) NOT NULL default '',

) ENGINE=InnoDB DEFAULT CHARSET=utf8;

show variables like "%char%";

set names utf8;

2.查看test数据库的编码格式:

mysql> show create database test;

3.查看yjdb数据表的编码格式:

mysql> show create table yjdb;

4,查看字段编码：

SHOW FULL COLUMNS FROM tbl_name;

设置数据库db_name默认为utf8:

ALTER DATABASE `db_name` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

设置表tb_name默认编码为utf8:

ALTER TABLE `tb_name` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

把表默认的字符集和所有字符列（CHAR,VARCHAR,TEXT）改为新的字符集：

ALTERTABLElogtestCONVERTTOCHARACTERSETutf8COLLATEutf8_general_ci;