一旦安裝完畢，MySQL 服務(wù)器應(yīng)該自己主動(dòng)啟動(dòng)。

sudo start mysql #手動(dòng)的話這樣啟動(dòng) sudo stop mysql #手動(dòng)停止

當(dāng)你改動(dòng)了配置文件后，你須要重新啟動(dòng) mysqld 才干使這些改動(dòng)生效。

要想檢查 mysqld 進(jìn)程是否已經(jīng)開啟，能夠使用以下的命令：

pgrep mysqld

假設(shè)進(jìn)程開啟。這個(gè)命令將會(huì)返回該進(jìn)程的 id。

?

MySQL配置文件：/etc/mysql/my.cnf ，當(dāng)中指定了數(shù)據(jù)文件存放路徑

datadir = /var/lib/mysql

假設(shè)你創(chuàng)建了一個(gè)名為 test 的數(shù)據(jù)庫(kù)。那么這個(gè)數(shù)據(jù)庫(kù)的數(shù)據(jù)會(huì)存放到 /var/lib/mysql/test 文件夾下。

?

?

進(jìn)入MySQL

mysql -u root -p

(輸入mysql的root密碼)

qii@ubuntu:~$ mysql -u root -p Enter password: Welcome to the MySQL monitor. Commands end with?; or \g. Your MySQL connection id is 37 Server version: 5.1.41-3ubuntu12.3 (Ubuntu)Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql>

改動(dòng) MySQL 的管理員密碼：

sudo mysqladmin -u root password newpassword。

?

查看當(dāng)前用戶擁有的數(shù)據(jù)庫(kù)：

mysql> show databases
??? -> ;
+--------------------+
| Database?????????? |
+--------------------+
| information_schema |
| mysql????????????? |
| performance_schema |
+--------------------+
3 rows in set (0.19 sec)

查看當(dāng)前用戶能夠用的數(shù)據(jù)庫(kù)：

mysql> show databases
??? -> ;
+--------------------+
| Database?????????? |
+--------------------+
| information_schema |
| mysql????????????? |
| performance_schema |
+--------------------+
3 rows in set (0.19 sec)

mysql> show tables
??? -> ;
ERROR 1046 (3D000): No database selected
mysql> select table_name from user_tables;
ERROR 1046 (3D000): No database selected
mysql> show databases;
+--------------------+
| Database?????????? |
+--------------------+
| information_schema |
| mysql????????????? |
| performance_schema |
+--------------------+
3 rows in set (0.00 sec)

?

選擇一個(gè)當(dāng)前數(shù)據(jù)庫(kù)：

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed

查看當(dāng)前數(shù)據(jù)庫(kù)中的表：
mysql> show tables
??? -> ;
+---------------------------+
| Tables_in_mysql?????????? |
+---------------------------+
| columns_priv????????????? |
| db??????????????????????? |
| event???????????????????? |
| func????????????????????? |
| general_log?????????????? |
| help_category???????????? |
| help_keyword????????????? |
| help_relation???????????? |
| help_topic??????????????? |
| host????????????????????? |
| ndb_binlog_index????????? |
| plugin??????????????????? |
| proc????????????????????? |
| procs_priv??????????????? |
| proxies_priv????????????? |
| servers?????????????????? |
| slow_log????????????????? |
| tables_priv?????????????? |
| time_zone???????????????? |
| time_zone_leap_second???? |
| time_zone_name??????????? |
| time_zone_transition????? |
| time_zone_transition_type |
| user????????????????????? |
+---------------------------+
24 rows in set (0.00 sec)

?查看一個(gè)表的具體信息：

mysql> describe servers;
+-------------+----------+------+-----+---------+-------+
| Field?????? | Type???? | Null | Key | Default | Extra |
+-------------+----------+------+-----+---------+-------+
| Server_name | char(64) | NO?? | PRI |???????? |?????? |
| Host??????? | char(64) | NO?? |???? |???????? |?????? |
| Db????????? | char(64) | NO?? |???? |???????? |?????? |
| Username??? | char(64) | NO?? |???? |???????? |?????? |
| Password??? | char(64) | NO?? |???? |???????? |?????? |
| Port??????? | int(4)?? | NO?? |???? | 0?????? |?????? |
| Socket????? | char(64) | NO?? |???? |???????? |?????? |
| Wrapper???? | char(64) | NO?? |???? |???????? |?????? |
| Owner?????? | char(64) | NO?? |???? |???????? |?????? |
+-------------+----------+------+-----+---------+-------+
9 rows in set (0.04 sec)

?

轉(zhuǎn)載于:https://www.cnblogs.com/xfgnongmin/p/10715303.html

總結(jié)

以上是生活随笔為你收集整理的mysql学习--基本使用的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。