如何調(diào)整MySQL數(shù)據(jù)表字符集

下面一起來了解下如何調(diào)整MySQL數(shù)據(jù)表字符集，相信大家看完肯定會(huì)受益匪淺，文字在精不在多，希望如何調(diào)整MySQL數(shù)據(jù)表字符集這篇短內(nèi)容是你想要的。

數(shù)據(jù)表t1表的結(jié)構(gòu).

mysql> show create table t1\G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `account` varchar(30) NOT NULL DEFAULT '',

  PRIMARY KEY (`id`),

  UNIQUE KEY `uniq_account` (`account`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

1. 調(diào)整默認(rèn)charset為utf8mb4.

mysql> alter table t1 default charset utf8mb4;

Query OK, 0 rows affected (0.07 sec)

Records: 0  Duplicates: 0  Warnings: 0

mysql> show create table t1\G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `account` varchar(30) CHARACTER SET utf8 NOT NULL DEFAULT '',

  PRIMARY KEY (`id`),

  UNIQUE KEY `uniq_account` (`account`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4

1 row in set (0.00 sec)

2. 調(diào)整account字段collate為utf8mb4_bin.

mysql> alter table t1 modify column account varchar(30) collate utf8mb4_bin not null default '';

Query OK, 0 rows affected (0.71 sec)

Records: 0  Duplicates: 0  Warnings: 

mysql> show create table t1\G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `account` varchar(30) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL DEFAULT '',

  PRIMARY KEY (`id`),

  UNIQUE KEY `uniq_account` (`account`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8mb4

1 row in set (0.00 sec)

3. 調(diào)整默認(rèn)charset, 和各字段charset為utf8.

mysql> alter table t1 convert to charset utf8;

Query OK, 0 rows affected (1.65 sec)

Records: 0  Duplicates: 0  Warnings: 0

mysql> show create table t1\G

*************************** 1. row ***************************

       Table: t1

Create Table: CREATE TABLE `t1` (

  `id` int(11) NOT NULL AUTO_INCREMENT,

  `account` varchar(30) NOT NULL DEFAULT '',

  PRIMARY KEY (`id`),

  UNIQUE KEY `uniq_account` (`account`)

) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8

1 row in set (0.00 sec)

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