Creating a DB and a table in MySQL

Creating a DB and a table in MySQL

Once you have installed MySQL and get MySQL service is running. We may launch the MySQL console in the command line in Windows:

c:/WHERE-MYSQL-INSTALLED/bin/mysql/mysql5.6.17/bin/mysql.exe

Once you have run the command you will have following lines in command window:

Welcome to the MySQL monitor.  Commands end with ; or \\g.
Your MySQL connection id is 1
Server version: 5.6.17 MySQL Community Server (GPL)
 
Copyright (c) 2000, 2014, 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>

Listing Available databases and Creating a new database

mysql> show schemas;
+--------------------+
| Database           |
+--------------------+
| information_schema |          
| mysql              |
| performance_schema |
| test               |
+--------------------+
5 rows in set (0.02 sec)
 
mysql> create database machinelearning;
Query OK, 1 row affected (0.00 sec)
 
mysql> use machinelearning;
Database changed

Creating a new Table adding new Values into the Table

mysql> create table decisiontree1(
    -> Outlook varchar(255),
    -> Temperature varchar(255),
    -> Humidity varchar(255),
    -> Windy boolean,
    -> PlayTennis varchar(255));
Query OK, 0 rows affected (0.39 sec)
 
mysql> INSERT INTO decisiontree1 VALUES('Rainy','Hot','High',FALSE,'No');
Query OK, 1 row affected (0.05 sec)
 
mysql> INSERT INTO decisiontree1 VALUES('Rainy','Hot','High',TRUE,'No');
Query OK, 1 row affected (0.06 sec)
 
mysql> INSERT INTO decisiontree1 VALUES('Overcast','Hot','High',FALSE,'Yes');
Query OK, 1 row affected (0.06 sec)
 
mysql> INSERT INTO decisiontree1 VALUES('Sunny','Mild','High',FALSE,'Yes');
Query OK, 1 row affected (0.06 sec)
 
mysql> INSERT INTO decisiontree1 VALUES('Sunny','Cool','Normal',FALSE,'Yes');
Query OK, 1 row affected (0.05 sec)

Displaying the table (Selecting all the columns and values)

mysql> select * from decisiontree1;
 
+----------+-------------+----------+-------+------------+
| Outlook  | Temperature | Humidity | Windy | PlayTennis |
+----------+-------------+----------+-------+------------+
| Rainy    | Hot         | High     |     0 | No         |
| Rainy    | Hot         | High     |     1 | No         |
| Overcast | Hot         | High     |     0 | Yes        |
| Sunny    | Mild        | High     |     0 | Yes        |
| Sunny    | Cool        | Normal   |     0 | Yes        |
| Sunny    | Cool        | Normal   |     1 | No         |
| Overcast | Cool        | Normal   |     1 | Yes        |
| Rainy    | Mild        | High     |     0 | No         |
| Rainy    | Cool        | Normal   |     0 | Yes        |
| Sunny    | Mild        | Normal   |     0 | Yes        |
| Rainy    | Mild        | Normal   |     1 | Yes        |
| Overcast | Mild        | High     |     1 | Yes        |
| Overcast | Hot         | Normal   |     0 | Yes        |
| Sunny    | Mild        | High     |     1 | No         |
+----------+-------------+----------+-------+------------+
14 rows in set (0.00 sec)