Mysql study notes (001) - Common Commands

Common commands

. 1  SHOW DATABASES;
 2  
. 3  / * 
. 4  use Test;
 . 5  Create Database MyEmployees;
 . 6  use MyEmployees;
 . 7  Create Table the Employees (
 . 8      the employee_id int (. 6) Primary Key Not null, # employee number
 . 9      FIRST_NAME VARCHAR (20 is), # Name
 10      last_name varchar (25), # name
 . 11      In email VARCHAR (25), mailbox #
 12 is      phone_num VARCHAR (20 is), the telephone number #
 13 is      the job_id VARCHAR (10), types of ID #
 14      the salary Double (10,2), salary #
 15      commission_pet double (4,2), # bonus rate of
 16      manager_id int (6), # superiors number
. 17      DEPARTMENT_ID int (. 4), # department number
 18 is      HireDate datetime # entry date
 . 19  )
 20 is  * / 
21 is  / * 
22 is  Create Table Departments (
 23 is      DEPARTMENT_ID int (. 4) Primary Key Not null, # department number
 24      DEPARTMENT_NAME VARCHAR (. 3), # department name
 25      manager_id int (6), # department heads employee number
 26      location_id int (4) # position number
 27  )
 28  * / 
29  / * 
30  the Create the Table locations (
 31      location_id int (11) Primary Key not null, # position numbers
 32      a street_address VARCHAR (40), street #
 33     postal_code varchar (12), # Zip
 34 is      City VARCHAR (30), # City
 35      State_Province VARCHAR (25), # State / Province
 36      the country_id VARCHAR (2) # State No.
 37 [  )
 38 is  * / 
39  
40  the CREATE  TABLE Jobs (
 41 is      the job_id VARCHAR ( 10 ) PRIMARY  KEY  the NOT  NULL , job number #
 42      JOB_TITLE VARCHAR ( 35 ), the working name #
 43      min_salary INT ( 6 ), the minimum wage #
 44     MAX_SALARY INT ( 6 ) # maximum wage
 45 )

 

summary: