-- 啟動(dòng)數(shù)據(jù)庫(kù)service myslqd start;-- 進(jìn)入MySQL -u root -p/mysql -h localhost -u root -p DatabaseName;-- 列出數(shù)據(jù)庫(kù)show database;-- 創(chuàng)建數(shù)據(jù)庫(kù)create database XXXX;-- 選擇數(shù)據(jù)庫(kù)use DatabaseName;-- 羅列表show table;-- 顯示表格的屬性show columns from tablename;-- 建立數(shù)據(jù)庫(kù)source filename.txt;-- 增加一個(gè)字段alter table tablename add column filename datatype;-- 增加多個(gè)字段alter table tablename add column filename1 datatype,add column filename2 datatype;-- 新增一個(gè)用戶grant all On *.* to user@localhost identity by "password";-- 查詢時(shí)間select now();-- 查詢用戶select user();-- 查詢數(shù)據(jù)庫(kù)版本select version();-- 查詢當(dāng)前使用的數(shù)據(jù)庫(kù)select database();-- 刪除student_course數(shù)據(jù)庫(kù)中的student數(shù)據(jù)便rm -f student_cource/student.*-- 備份數(shù)據(jù)庫(kù)(備份數(shù)據(jù)庫(kù)Apple1)MySQLdump -u root -p Apple1>C:/Apple1.txt-- 備份表(將數(shù)據(jù)庫(kù)Apple1中的mytable表備份)MySQLdump -u root -p mytable>C:/Apple.txt-- 創(chuàng)建臨時(shí)表(mytable)create temporary table mytable(id int,address varchar(20),name varchar(20));-- 創(chuàng)建表前先判斷系統(tǒng)是否存在這個(gè)表create table if not exists mytable(......);-- 從已有的table1表中復(fù)制表結(jié)構(gòu)到table2create table table2 select * from table1 where 1<>1;-- 復(fù)制表create table table2 select * from table1;-- 重命名表名alter table table1 rename as table2;-- 修改列的數(shù)據(jù)類型alter table table1 modify ID int unsigned;--把列ID的類型修改為int unsignedalter table table1 change ID SID int unsigned; --把列ID改名為 SID且類型改為int unsigned-- 創(chuàng)建索引alter table table1 add index Ind_id (ID);create index ind_ID on tablename (ID);create unique index ind_id on tablename(ID);-- 刪除索引drop index ind_id On table1;alter table table1 drop index ind_ID;-- 聯(lián)合查詢字符與多個(gè)列連接‘select concat(ID,':',name,'=') from table1-----------------------第二片--------------------------------------顯示數(shù)據(jù)庫(kù)show database;--顯示數(shù)據(jù)庫(kù)中的表show tables;--顯示數(shù)據(jù)表結(jié)構(gòu)describe tablename;--顯示表記錄select * from tablename;--查詢能操作MySQL的用戶select * from user;--創(chuàng)建數(shù)據(jù)庫(kù)create database databasename--例如↓MySQL> create database AA;---創(chuàng)建表user AA;mysql> create table table1(ID int auto_increment not null primary key,name char(6),sex char(6),birthday date) ---插入幾條記錄 MySQL> insert into AA values('','張三','男','1971-10-01'); MySQL> insert into AA values('','劉佳佳','女','1978-10-01'); --驗(yàn)證結(jié)果 MySQL> select * from AA;--修改張三的生日為1971-01-10MySQL> update AA set birthday = '1971-01-10' where ID = '1'; --刪除記錄MySQL> delete from AA where ID = '1';--刪除表以及庫(kù)mysql> drop table tablename;MySQL> drop database databasename;--新增萬(wàn)能用戶-- 格式：grant select On database.* to username@localhost identity by 'password'用戶名user_1 密碼是123456--可以自任何PC上登錄這個(gè)用戶對(duì)數(shù)據(jù)庫(kù)為所欲為MySQL> grant select,insert update,delete on *.* to user_1@"%" identity by "123456";--創(chuàng)建只有在本機(jī)才能操作數(shù)據(jù)庫(kù)的用戶用戶名user_2 密碼是123456MySQL> grant select,insert update,delete on *.* to user_2@localhost identity by "123456";--登錄數(shù)據(jù)庫(kù)庫(kù)MySQL> -u user_1 -p -h IP地址;