mysql数据库创建、删除数据库
时间:2021-07-01 10:21:17
帮助过:25人阅读
(1)创建数据库
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- mysql> CREATE DATABASE my_db1;
- Query OK, 1 row affected (0.00 sec)
(2)因为my_db1已经存在,再次创建会报错
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- mysql> CREATE DATABASE my_db1;
- ERROR 1007 (HY000): Can‘t create database ‘my_db1‘; database exists
(4)加上IF NOT EXISTS就算数据库已经存在,把原来的覆盖掉了
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- mysql> CREATE DATABASE IF NOT EXISTS my_db1;
- Query OK, 1 row affected, 1 warning (0.00 sec)
二、创建数据库包含字符集和排序规则
(1)查看mysql字符集
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- mysql> SHOW CHARACTER SET;
- +
- | Charset | Description | Default collation | Maxlen |
- +
- | big5 | Big5 Traditional Chinese | big5_chinese_ci | 2 |
- | dec8 | DEC West European | dec8_swedish_ci | 1 |
- | cp850 | DOS West European | cp850_general_ci | 1 |
- | hp8 | HP West European | hp8_english_ci | 1 |
- | koi8r | KOI8-R Relcom Russian | koi8r_general_ci | 1 |
- | latin1 | cp1252 West European | latin1_swedish_ci | 1 |
- .......
(2)查看mysql排序规则
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- mysql> SHOW COLLATION;
- +
- | Collation | Charset | Id | Default | Compiled | Sortlen |
- +
- | big5_chinese_ci | big5 | 1 | Yes | Yes | 1 |
- | big5_bin | big5 | 84 | | Yes | 1 |
- | dec8_swedish_ci | dec8 | 3 | Yes | Yes | 1 |
- | dec8_bin | dec8 | 69 | | Yes | 1 |
- | cp850_general_ci | cp850 | 4 | Yes | Yes | 1 |
- | cp850_bin | cp850 | 80 | | Yes | 1 |
- | hp8_english_ci | hp8 | 6 | Yes | Yes | 1 |
- .................
(3)创建数据库包括字符集和排序规则
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- mysql> CREATE DATABASE IF NOT EXISTS hdu CHARACTER SET ‘gbk‘ COLLATE ‘gbk_chinese_ci‘;
- Query OK, 1 row affected (0.00 sec)
三、删除数据库
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- mysql> DROP DATABASE my_db1;
- Query OK, 0 rows affected (0.00 sec)
mysql数据库创建、删除数据库
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