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登錄數據庫
1、啓動數據庫net start mysql
2、連接數據庫mysql -u root -p123456
3、查看數據庫show databases;
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | admin | | mysql | | performance_schema | | sys | +--------------------+ 5 rows in set (0.00 sec)
4、如何創建數據庫及查看數據庫中的表以及其他操作
1.) 先選中數據庫use admin
// admin 是數據庫
2.) 創建數據庫mysql> create database test; Query OK, 1 row affected (0.00 sec)
3.) 查看數據庫中的數據表
show tables;
mysql> show tables; Empty set (0.00 sec)
4.) 創建數據表
CREATE TABLE test_name( id INT(10), name VARCHAR(100), age INT(10), date DATE);
mysql> CREATE TABLE test_name( -> id INT(10), -> name VARCHAR(100), -> age INT(10), -> date DATE); Query OK, 0 rows affected (0.01 sec)
5.) 查看數據表的結構
describe test_name;
mysql> describe test_name; +-------+--------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------+--------------+------+-----+---------+-------+ | id | int(10) | YES | | NULL | | | name | varchar(100) | YES | | NULL | | | age | int(10) | YES | | NULL | | | date | date | YES | | NULL | | +-------+--------------+------+-----+---------+-------+ 4 rows in set (0.01 sec)
6.) 查看數據表記錄
select * from test_name;
mysql> select * from test_name; Empty set (0.00 sec)
7.) 如何讓數據表中添加記錄
mysql> insert into test_name -> values(1,'bob',12,'2020-12-12'); Query OK, 1 row affected (0.00 sec)
再次查看數據表
mysql> select * from test_name; +------+------+------+------------+ | id | name | age | date | +------+------+------+------------+ | 1 | bob | 12 | 2020-12-12 | +------+------+------+------------+ 1 row in set (0.00 sec)
5、退出服務器 exit;
mysql 常用數據類型有哪些
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數值類型
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日期類型
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字符串類型