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在CentOS系統(tǒng)中,我們可以通過命令行或者圖形化界面來登錄MySQL數(shù)據(jù)庫,本文將詳細(xì)介紹如何在CentOS系統(tǒng)中登錄MySQL數(shù)據(jù)庫。

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安裝MySQL
在CentOS系統(tǒng)中,我們首先需要安裝MySQL數(shù)據(jù)庫,以下是安裝MySQL的步驟:
1、更新系統(tǒng)軟件包
sudo yum update
2、安裝MySQL服務(wù)器
sudo yum install mysqlserver
3、啟動MySQL服務(wù)
sudo systemctl start mysqld
4、設(shè)置MySQL開機(jī)自啟
sudo systemctl enable mysqld
5、查看MySQL服務(wù)狀態(tài)
sudo systemctl status mysqld
登錄MySQL數(shù)據(jù)庫
在CentOS系統(tǒng)中,我們可以通過以下兩種方式登錄MySQL數(shù)據(jù)庫:
1、使用命令行登錄MySQL數(shù)據(jù)庫
我們可以使用mysql命令來登錄MySQL數(shù)據(jù)庫,以下是登錄MySQL數(shù)據(jù)庫的命令:
mysql u root p
u參數(shù)表示用戶名,p參數(shù)表示提示輸入密碼,輸入上述命令后,系統(tǒng)會提示輸入密碼,輸入正確的密碼后,即可成功登錄MySQL數(shù)據(jù)庫。
2、使用圖形化界面登錄MySQL數(shù)據(jù)庫
我們可以使用圖形化界面工具如MySQL Workbench來登錄MySQL數(shù)據(jù)庫,以下是使用MySQL Workbench登錄MySQL數(shù)據(jù)庫的步驟:
(1)下載并安裝MySQL Workbench:訪問MySQL官方網(wǎng)站(https://www.mysql.com/products/workbench/),下載適用于CentOS系統(tǒng)的MySQL Workbench安裝包,并按照提示進(jìn)行安裝。
(2)打開MySQL Workbench,點(diǎn)擊左上角的“File”菜單,選擇“New Connection”。
(3)在彈出的“New Connection”窗口中,輸入主機(jī)名(一般為localhost)、端口號(默認(rèn)為3306)、用戶名和密碼,然后點(diǎn)擊“Test Connection”按鈕測試連接是否成功,如果連接成功,點(diǎn)擊“OK”按鈕保存連接信息。
(4)點(diǎn)擊“Connect to Database”按鈕,即可成功登錄MySQL數(shù)據(jù)庫。
操作MySQL數(shù)據(jù)庫
在登錄到MySQL數(shù)據(jù)庫后,我們可以執(zhí)行SQL語句來操作數(shù)據(jù)庫,以下是一些常用的SQL語句:
1、顯示所有數(shù)據(jù)庫:SHOW DATABASES;
2、選擇某個數(shù)據(jù)庫:USE database_name;
3、顯示當(dāng)前數(shù)據(jù)庫的所有表:SHOW TABLES;
4、查詢某個表的數(shù)據(jù):SELECT * FROM table_name;
5、插入數(shù)據(jù):INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...);
6、更新數(shù)據(jù):UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
7、刪除數(shù)據(jù):DELETE FROM table_name WHERE condition;
8、創(chuàng)建表:CREATE TABLE table_name (column1 datatype, column2 datatype, ...);
9、修改表結(jié)構(gòu):ALTER TABLE table_name ADD column_name datatype;或ALTER TABLE table_name DROP COLUMN column_name;等。
10、刪除表:DROP TABLE table_name;
11、退出MySQL命令行:exit;或quit;或\q;或按下Ctrl+D組合鍵。
常見問題及解答
1、Q: 在CentOS系統(tǒng)中,如何查看MySQL的版本信息?
A: 我們可以使用以下命令來查看MySQL的版本信息:
```bash
mysql version | grep "Ver" | cut d "" f23 | cut d "." f12 | tr d " " | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') v" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') r" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') p" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') c" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') b" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') a" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') d" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') e" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') f" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') g" | tr " " "." | tr "." "_" | tr "_" "." | sort rn | head n1 | xargs echo n "$(echo $0 | grep o '[^ ]*') h" | tr " " "." | tr "." 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標(biāo)題名稱:centos登陸mysql數(shù)據(jù)庫_CentOS
文章鏈接:http://fisionsoft.com.cn/article/cdpcooo.html


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