MySql技术内幕之MySQL入门(2)

MySql技术内幕之MySQL入门(2)

接上一篇。

mysql> source create_member.sql;  # 创建member表
Query OK, 0 rows affected, 1 warning (0.00 sec)

Query OK, 0 rows affected (0.26 sec)

mysql> source insert_member.sql;  # 插入member表数据
Query OK, 0 rows affected (0.00 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.08 sec)

Query OK, 1 row affected (0.08 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.08 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.06 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.06 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.03 sec)

Query OK, 1 row affected (0.28 sec)

Query OK, 1 row affected (0.07 sec)

Query OK, 1 row affected (0.06 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.06 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.14 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.06 sec)

Query OK, 1 row affected (0.04 sec)

Query OK, 1 row affected (0.05 sec)

Query OK, 1 row affected (0.05 sec)


mysql> SHOW TABLES;  # 列出默认数据库中的表
+------------------+
| Tables_in_sampdb |
+------------------+
| member           |
| president        |
+------------------+
3 rows in set (0.00 sec)

mysql> SHOW DATABASES;  # 列出当前连接到服务器上的所有数据库
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| sampdb             |
| sys                |
+--------------------+
5 rows in set (0.00 sec)

美史联盟表

以上创建了两个表：president表和member表。
下面简单介绍一下这两张表

president表

mysql> DESC president;
+------------+-------------+------+-----+---------+-------+
| Field      | Type        | Null | Key | Default | Extra |
+------------+-------------+------+-----+---------+-------+
| last_name  | varchar(15) | NO   |     | NULL    |       |
| first_name | varchar(15) | NO   |     | NULL    |       |
| suffix     | varchar(5)  | YES  |     | NULL    |       |
| city       | varchar(20) | NO   |     | NULL    |       |
| state      | varchar(2)  | NO   |     | NULL    |       |
| birth      | date        | NO   |     | NULL    |       |
| death      | date        | YES  |     | NULL    |       |
+------------+-------------+------+-----+---------+-------+
7 rows in set (0.00 sec)

姓名
出生地（城市和州）
出生日期
逝世日期

member表

mysql> DESC member;
+------------+------------------+------+-----+---------+----------------+
| Field      | Type             | Null | Key | Default | Extra          |
+------------+------------------+------+-----+---------+----------------+
| member_id  | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| last_name  | varchar(20)      | NO   |     | NULL    |                |
| first_name | varchar(20)      | NO   |     | NULL    |                |
| suffix     | varchar(5)       | YES  |     | NULL    |                |
| expiration | date             | YES  |     | NULL    |                |
| email      | varchar(100)     | YES  |     | NULL    |                |
| street     | varchar(50)      | YES  |     | NULL    |                |
| city       | varchar(50)      | YES  |     | NULL    |                |
| state      | varchar(2)       | YES  |     | NULL    |                |
| zip        | varchar(10)      | YES  |     | NULL    |                |
| phone      | varchar(20)      | YES  |     | NULL    |                |
| interests  | varchar(255)     | YES  |     | NULL    |                |
+------------+------------------+------+-----+---------+----------------+
12 rows in set (0.00 sec)

ID编号
姓名
有效期
电子邮件地址
通信地址
电话号码
兴趣爱好

检索信息

mysql> SELECT * FROM president; # 检索全部信息
+------------+---------------+--------+---------------------+-------+------------+------------+
| last_name  | first_name    | suffix | city                | state | birth      | death      |
+------------+---------------+--------+---------------------+-------+------------+------------+
| Washington | George        | NULL   | Wakefield           | VA    | 1732-02-22 | 1799-12-14 |
| Adams      | John          | NULL   | Braintree           | MA    | 1735-10-30 | 1826-07-04 |
| Jefferson  | Thomas        | NULL   | Albemarle County    | VA    | 1743-04-13 | 1826-07-04 |
| Madison    | James         | NULL   | Port Conway         | VA    | 1751-03-16 | 1836-06-28 |
| Monroe     | James         | NULL   | Westmoreland County | VA    | 1758-04-28 | 1831-07-04 |
| Adams      | John Quincy   | NULL   | Braintree           | MA    | 1767-07-11 | 1848-02-23 |
| Jackson    | Andrew        | NULL   | Waxhaw settlement   | SC    | 1767-03-15 | 1845-06-08 |
| Van Buren  | Martin        | NULL   | Kinderhook          | NY    | 1782-12-05 | 1862-07-24 |
| Harrison   | William H.    | NULL   | Berkeley            | VA    | 1773-02-09 | 1841-04-04 |
| Tyler      | John          | NULL   | Greenway            | VA    | 1790-03-29 | 1862-01-18 |
| Polk       | James K.      | NULL   | Pineville           | NC    | 1795-11-02 | 1849-06-15 |
| Taylor     | Zachary       | NULL   | Orange County       | VA    | 1784-11-24 | 1850-07-09 |
| Fillmore   | Millard       | NULL   | Locke               | NY    | 1800-01-07 | 1874-03-08 |
| Pierce     | Franklin      | NULL   | Hillsboro           | NH    | 1804-11-23 | 1869-10-08 |
| Buchanan   | James         | NULL   | Mercersburg         | PA    | 1791-04-23 | 1868-06-01 |
| Lincoln    | Abraham       | NULL   | Hodgenville         | KY    | 1809-02-12 | 1865-04-15 |
| Johnson    | Andrew        | NULL   | Raleigh             | NC    | 1808-12-29 | 1875-07-31 |
| Grant      | Ulysses S.    | NULL   | Point Pleasant      | OH    | 1822-04-27 | 1885-07-23 |
| Hayes      | Rutherford B. | NULL   | Delaware            | OH    | 1822-10-04 | 1893-01-17 |
| Garfield   | James A.      | NULL   | Orange              | OH    | 1831-11-19 | 1881-09-19 |
| Arthur     | Chester A.    | NULL   | Fairfield           | VT    | 1829-10-05 | 1886-11-18 |
| Cleveland  | Grover        | NULL   | Caldwell            | NJ    | 1837-03-18 | 1908-06-24 |
| Harrison   | Benjamin      | NULL   | North Bend          | OH    | 1833-08-20 | 1901-03-13 |
| McKinley   | William       | NULL   | Niles               | OH    | 1843-01-29 | 1901-09-14 |
| Roosevelt  | Theodore      | NULL   | New York            | NY    | 1858-10-27 | 1919-01-06 |
| Taft       | William H.    | NULL   | Cincinnati          | OH    | 1857-09-15 | 1930-03-08 |
| Wilson     | Woodrow       | NULL   | Staunton            | VA    | 1856-12-19 | 1924-02-03 |
| Harding    | Warren G.     | NULL   | Blooming Grove      | OH    | 1865-11-02 | 1923-08-02 |
| Coolidge   | Calvin        | NULL   | Plymouth Notch      | VT    | 1872-07-04 | 1933-01-05 |
| Hoover     | Herbert C.    | NULL   | West Branch         | IA    | 1874-08-10 | 1964-10-20 |
| Roosevelt  | Franklin D.   | NULL   | Hyde Park           | NY    | 1882-01-30 | 1945-04-12 |
| Truman     | Harry S       | NULL   | Lamar               | MO    | 1884-05-08 | 1972-12-26 |
| Eisenhower | Dwight D.     | NULL   | Denison             | TX    | 1890-10-14 | 1969-03-28 |
| Kennedy    | John F.       | NULL   | Brookline           | MA    | 1917-05-29 | 1963-11-22 |
| Johnson    | Lyndon B.     | NULL   | Stonewall           | TX    | 1908-08-27 | 1973-01-22 |
| Nixon      | Richard M.    | NULL   | Yorba Linda         | CA    | 1913-01-09 | 1994-04-22 |
| Ford       | Gerald R.     | NULL   | Omaha               | NE    | 1913-07-14 | 2006-12-26 |
| Carter     | James E.      | Jr.    | Plains              | GA    | 1924-10-01 | NULL       |
| Reagan     | Ronald W.     | NULL   | Tampico             | IL    | 1911-02-06 | 2004-06-05 |
| Bush       | George H.W.   | NULL   | Milton              | MA    | 1924-06-12 | NULL       |
| Clinton    | William J.    | NULL   | Hope                | AR    | 1946-08-19 | NULL       |
| Bush       | George W.     | NULL   | New Haven           | CT    | 1946-07-06 | NULL       |
| Obama      | Barack H.     | NULL   | Honolulu            | HI    | 1961-08-04 | NULL       |
+------------+---------------+--------+---------------------+-------+------------+------------+
43 rows in set (0.00 sec)

mysql> SELECT first_name FROM president; # 检索单个信息
+---------------+
| first_name    |
+---------------+
| George        |
| John          |
| Thomas        |
| James         |
| James         |
| John Quincy   |
| Andrew        |
| Martin        |
| William H.    |
| John          |
| James K.      |
| Zachary       |
| Millard       |
| Franklin      |
| James         |
| Abraham       |
| Andrew        |
| Ulysses S.    |
| Rutherford B. |
| James A.      |
| Chester A.    |
| Grover        |
| Benjamin      |
| William       |
| Theodore      |
| William H.    |
| Woodrow       |
| Warren G.     |
| Calvin        |
| Herbert C.    |
| Franklin D.   |
| Harry S       |
| Dwight D.     |
| John F.       |
| Lyndon B.     |
| Richard M.    |
| Gerald R.     |
| James E.      |
| Ronald W.     |
| George H.W.   |
| William J.    |
| George W.     |
| Barack H.     |
+---------------+
43 rows in set (0.00 sec)

mysql> SELECT first_name, last_name FROM president; # 检索多个信息
+---------------+------------+
| first_name    | last_name  |
+---------------+------------+
| George        | Washington |
| John          | Adams      |
| Thomas        | Jefferson  |
| James         | Madison    |
| James         | Monroe     |
| John Quincy   | Adams      |
| Andrew        | Jackson    |
| Martin        | Van Buren  |
| William H.    | Harrison   |
| John          | Tyler      |
| James K.      | Polk       |
| Zachary       | Taylor     |
| Millard       | Fillmore   |
| Franklin      | Pierce     |
| James         | Buchanan   |
| Abraham       | Lincoln    |
| Andrew        | Johnson    |
| Ulysses S.    | Grant      |
| Rutherford B. | Hayes      |
| James A.      | Garfield   |
| Chester A.    | Arthur     |
| Grover        | Cleveland  |
| Benjamin      | Harrison   |
| William       | McKinley   |
| Theodore      | Roosevelt  |
| William H.    | Taft       |
| Woodrow       | Wilson     |
| Warren G.     | Harding    |
| Calvin        | Coolidge   |
| Herbert C.    | Hoover     |
| Franklin D.   | Roosevelt  |
| Harry S       | Truman     |
| Dwight D.     | Eisenhower |
| John F.       | Kennedy    |
| Lyndon B.     | Johnson    |
| Richard M.    | Nixon      |
| Gerald R.     | Ford       |
| James E.      | Carter     |
| Ronald W.     | Reagan     |
| George H.W.   | Bush       |
| William J.    | Clinton    |
| George W.     | Bush       |
| Barack H.     | Obama      |
+---------------+------------+
43 rows in set (0.00 sec)

指定检索条件

mysql> SELECT last_name, first_name FROM president
    -> WHERE last_name = 'ROOSEVELT'; ＃　指定检索条件，last_name = 'ROOSEVELT'
+-----------+-------------+
| last_name | first_name  |
+-----------+-------------+
| Roosevelt | Theodore    |
| Roosevelt | Franklin D. |
+-----------+-------------+
2 rows in set (0.00 sec)

mysql> SELECT last_name, first_name FROM president 
    -> WHERE last_name = 'roosevelt'; # 字符集通常不区分大小写
+-----------+-------------+
| last_name | first_name  |
+-----------+-------------+
| Roosevelt | Theodore    |
| Roosevelt | Franklin D. |
+-----------+-------------+
2 rows in set (0.00 sec)