Getting started with MySQL-quick reference (2) _ MySQL

MySQL Getting Started Guide-quick reference (2) II. MySQL User Guide

1. use MySQL to create a new database

Run in shell:

$> Mysqladmin create database01

Database "database01" created.

2. start MySQL

Run in shell:

$> Mysql

Welcome to the MySQL monitor. Commands end with; or g.

Your MySQL connection id is 22 to server version: 3.21. 29a-gamma-debug

Type 'HELP' for help.

3. change the database

Mysql> use database01

Database changed.

4. create a table

Mysql> create table table01 (field01 integer, field02 char (10 ));

Query OK, 0 rows affected (0.00 sec)

5. list tables

Mysql> show tables;

Tables in database01

Table01

Table02

6. list fields in the table

Mysql> show columns from table01;

Field Type Null Key Default Extra

Field01 int (11) YES

Field02 char (10) YES

7. enter data in the table

Insert data

Mysql> insert into table01 (field01, field02) values (1, 'first ');

Query OK, 1 row affected (0.00 sec)

8. add fields

... One field at a time

Mysql> alter table table01 add column field03 char (20 );

Query OK, l row affected (0.04 sec)

Records: 1 Duplicates: 0 Warnings: 0

... Multiple fields at a time

Mysql> alter table table01 add column field04 date, add column field05 time;

Query OK, l row affected (0.04 sec)

Records: 1 Duplicates: 0 Warnings: 0

Note: Each column must start again with "add column.

Is it running? Let's take a look.

Mysql> select * from table01;

Field01 field02 field03 field04 field05
1 first NULL