Create Simple Tables : Create Table « Table Index « SQL / MySQL

1. SQL / MySQL
2. Table Index
3. Create Table

Create Simple Tables

   
/*
mysql> DROP TABLE Employee;

mysql> CREATE TABLE Employee (
    ->     Name VARCHAR(50),
    ->     Phone VARCHAR(15)
    -> );
Query OK, 0 rows affected (0.21 sec)

mysql> Show tables;
+-------------+
| Tables_in_t |
+-------------+
| employee    |
| enrollment  |
| student     |
| studentexam |
+-------------+
4 rows in set (0.07 sec)

mysql> Describe Employee;
+-------+-------------+------+-----+---------+-------+
| Field | Type        | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| Name  | varchar(50) | YES  |     | NULL    |       |
| Phone | varchar(15) | YES  |     | NULL    |       |
+-------+-------------+------+-----+---------+-------+
2 rows in set (0.03 sec)

mysql> INSERT INTO Employee (Name, Phone) VALUES ('Joe Wang', '666 2323');
Query OK, 1 row affected (0.04 sec)

mysql> INSERT INTO Employee (Name) VALUES ('John Doe');
Query OK, 1 row affected (0.02 sec)

mysql> INSERT INTO Employee (Name, Phone) VALUES ('John Doe', NULL);
Query OK, 1 row affected (0.01 sec)

mysql> Select * from Employee;
+----------+----------+
| Name     | Phone    |
+----------+----------+
| Joe Wang  | 666 2323 |
| John Doe | NULL     |
| John Doe | NULL     |
+----------+----------+
3 rows in set (0.08 sec)


*/

DROP TABLE Employee;

CREATE TABLE Employee (
    Name VARCHAR(50), 
    Phone VARCHAR(15)
);

Show tables;
Describe Employee;

INSERT INTO Employee (Name, Phone) VALUES ('Joe Wang', '666 2323');
INSERT INTO Employee (Name) VALUES ('John Doe');
INSERT INTO Employee (Name, Phone) VALUES ('John Doe', NULL);

Select * from Employee;

           
         
    
    
  

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