sql笔记（待整理）
Last login: Tue Feb 28 19:59:11 on console
bogon:~ tinghou$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.6.12 MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| day05 |
| day06 |
| day07 |
| mysql |
| performance_schema |
| studyMysql |
| test |
| testdb |
| textdb1 |
+--------------------+
10 rows in set (0.01 sec)
mysql> use day07;
Database changed
mysql> show tables;
Empty set (0.00 sec)
mysql> use day06;
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
mysql> show tables;
+-----------------+
| Tables_in_day06 |
+-----------------+
| emp |
| stu |
| users |
+-----------------+
3 rows in set (0.00 sec)
mysql> desc users;
+----------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(40) | YES | | NULL | |
| password | varchar(40) | YES | | NULL | |
| email | varchar(60) | YES | | NULL | |
| birthday | date | YES | | NULL | |
+----------+-------------+------+-----+---------+----------------+
5 rows in set (0.01 sec)
mysql> select * frome users;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'frome users' at line 1
mysql> select *from users;
+----+------+----------+-------------+------------+
| id | name | password | email | birthday |
+----+------+----------+-------------+------------+
| 1 | zs | 123456 | [email protected] | 1980-12-04 |
| 2 | ls | 123 | [email protected] | 1990-01-01 |
+----+------+----------+-------------+------------+
2 rows in set (0.00 sec)
mysql> create table sort(
-> sid int primary key,
-> sname varchar(50),
-> sprice double,
-> sdesc varchar(50)
-> )
->
-> ;
Query OK, 0 rows affected (0.04 sec)
mysql> desc sort;
+--------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------+-------------+------+-----+---------+-------+
| sid | int(11) | NO | PRI | NULL | |
| sname | varchar(50) | YES | | NULL | |
| sprice | double | YES | | NULL | |
| sdesc | varchar(50) | YES | | NULL | |
+--------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)
mysql> exit;
Bye
bogon:~ tinghou$ mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 304
Server version: 5.6.12 MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database mybase;
Query OK, 1 row affected (0.01 sec)
mysql> use mybase;
Database changed
mysql> create table sort(
-> sid int primary key,
-> sname varchar(50),
-> sprice double,
-> sdesc varchar(50)
-> );
Query OK, 0 rows affected (0.02 sec)
mysql> desc sort;
+--------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+--------+-------------+------+-----+---------+-------+
| sid | int(11) | NO | PRI | NULL | |
| sname | varchar(50) | YES | | NULL | |
| sprice | double | YES | | NULL | |
| sdesc | varchar(50) | YES | | NULL | |
+--------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)
mysql> insert into sort(sid,sname,sprice,sdesc)values(1,'zhangsan',60.5,'heihei);
'>
'> insert into sort(sid,sname,sprice,sdesc) values(1,'zhangsan',60.5,'heihei);
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'zhangsan',60.5,'heihei)' at line 1
mysql> insert into sort(sid,sname,sprice,sdesc) values(1,'zhangsan',60.5,'heihei');
Query OK, 1 row affected (0.01 sec)
mysql> insert into sort(sid,sname,sprice,sdesc) values(2,'zl',55.8,'hh');
Query OK, 1 row affected (0.01 sec)
mysql> select *from sort;
+-----+----------+--------+--------+
| sid | sname | sprice | sdesc |
+-----+----------+--------+--------+
| 1 | zhangsan | 60.5 | heihei |
| 2 | zl | 55.8 | hh |
+-----+----------+--------+--------+
2 rows in set (0.00 sec)
mysql> select *from sort;
+-----+----------+--------+--------+
| sid | sname | sprice | sdesc |
+-----+----------+--------+--------+
| 1 | zhangsan | 60.5 | heihei |
| 2 | zl | 55.8 | hh |
+-----+----------+--------+--------+
2 rows in set (0.00 sec)
mysql> create table users(
-> username varchar(50),
-> password varchar(50)
-> );
Query OK, 0 rows affected (0.03 sec)
mysql> insert into users values('zs','12345'),('zl','123'),('ww','456');
Query OK, 3 rows affected (0.01 sec)
Records: 3 Duplicates: 0 Warnings: 0
mysql> select *from users;
+----------+----------+
| username | password |
+----------+----------+
| zs | 12345 |
| zl | 123 |
| ww | 456 |
+----------+----------+
3 rows in set (0.00 sec)
mysql> drop table users;
Query OK, 0 rows affected (0.01 sec)
mysql> create table users(
-> id int primary key auto_increment,
-> username varchar(100),
-> password varchar(100)
-> );
Query OK, 0 rows affected (0.02 sec)
mysql> insert into users(username,password) values('zs','123'),('zl','456');
Query OK, 2 rows affected (0.00 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> select *from users;
+----+----------+----------+
| id | username | password |
+----+----------+----------+
| 1 | zs | 123 |
| 2 | zl | 456 |
+----+----------+----------+
2 rows in set (0.00 sec)
mysql>