MySQL列出所有表

2019-10-16 22:55:50

在本教學中,您將學習如何使用MySQL SHOW TABLES命令查詢特定資料庫中的表。

要在MySQL資料庫中列出所有表,請按照下列步驟操作:

  1. 使用MySQL用戶端(如mysql)登入到MySQL資料庫伺服器
  2. 使用USE語句切換到特定的資料庫。
  3. 使用SHOW TABLES命令。

下面說明了MySQL SHOW TABLES命令的語法:

SHOW TABLES;

MySQL SHOW TABLES範例

以下範例說明如何列出yiibaidb資料庫中的所有表。

步驟1 - 連線到MySQL資料庫伺服器:

C:\Users\Administrator>mysql -u root -p

步驟2 -切換到yiibaidb資料庫:

mysql> USE yiibaidb;
Database changed
mysql>

步驟3 - 顯示yiibaidb資料庫中的所有表:

mysql> show tables;
+--------------------+
| Tables_in_yiibaidb |
+--------------------+
| aboveavgproducts   |
| article_tags       |
| bigsalesorder      |
| contacts           |
| customerorders     |
| customers          |
| departments        |
| employees          |
| employees_audit    |
| officeinfo         |
| offices            |
| offices_bk         |
| offices_usa        |
| orderdetails       |
| orders             |
| organization       |
| payments           |
| price_logs         |
| productlines       |
| products           |
| saleperorder       |
| user_change_logs   |
| v_contacts         |
| vps                |
+--------------------+
24 rows in set

SHOW TABLES命令可顯示表是基表還是檢視。 要在結果中包含表型別,請使用SHOW TABLES語句,如下所示 -

SHOW FULL TABLES;

執行上面語句,如下所示 -

mysql> SHOW FULL TABLES;
+--------------------+------------+
| Tables_in_yiibaidb | Table_type |
+--------------------+------------+
| aboveavgproducts   | VIEW       |
| article_tags       | BASE TABLE |
| bigsalesorder      | VIEW       |
| contacts           | BASE TABLE |
| customerorders     | VIEW       |
| customers          | BASE TABLE |
| departments        | BASE TABLE |
| employees          | BASE TABLE |
| employees_audit    | BASE TABLE |
| officeinfo         | VIEW       |
| offices            | BASE TABLE |
| offices_bk         | BASE TABLE |
| offices_usa        | BASE TABLE |
| orderdetails       | BASE TABLE |
| orders             | BASE TABLE |
| organization       | VIEW       |
| payments           | BASE TABLE |
| price_logs         | BASE TABLE |
| productlines       | BASE TABLE |
| products           | BASE TABLE |
| saleperorder       | VIEW       |
| user_change_logs   | BASE TABLE |
| v_contacts         | VIEW       |
| vps                | VIEW       |
+--------------------+------------+
24 rows in set

我們在yiibaidb資料庫中建立一個名為view_contacts的檢視,其中包括來自employeescustomers表的名字,姓氏和電話。

CREATE VIEW view_contacts 
AS 
SELECT lastName, firstName, extension as phone 
FROM employees 
UNION
SELECT contactFirstName, contactLastName, phone 
FROM customers;

現在,執行查詢SHOW FULL TABLES命令:

mysql> SHOW FULL TABLES;
+--------------------+------------+
| Tables_in_yiibaidb | Table_type |
+--------------------+------------+
| aboveavgproducts   | VIEW       |
| article_tags       | BASE TABLE |
| bigsalesorder      | VIEW       |
| contacts           | BASE TABLE |
| customerorders     | VIEW       |
| customers          | BASE TABLE |
| departments        | BASE TABLE |
| employees          | BASE TABLE |
| employees_audit    | BASE TABLE |
| officeinfo         | VIEW       |
| offices            | BASE TABLE |
| offices_bk         | BASE TABLE |
| offices_usa        | BASE TABLE |
| orderdetails       | BASE TABLE |
| orders             | BASE TABLE |
| organization       | VIEW       |
| payments           | BASE TABLE |
| price_logs         | BASE TABLE |
| productlines       | BASE TABLE |
| products           | BASE TABLE |
| saleperorder       | VIEW       |
| user_change_logs   | BASE TABLE |
| v_contacts         | VIEW       |
| view_contacts      | VIEW       |
| vps                | VIEW       |
+--------------------+------------+
25 rows in set

您可以看到,v_contacts,view_contacts,vps等是檢視(VIEW),而其它表則都是基表(BASE TABLE)。

對於具有很多表的資料庫,一次顯示所有表可能不免直觀。

幸運的是,SHOW TABLES命令提供了一個選項,允許使用LIKE運算子或WHERE子句中的表示式對返回的表進行過濾,如下所示:

SHOW TABLES LIKE pattern;

SHOW TABLES WHERE expression;

例如,要顯示yiibaidb資料庫中以字母p開頭的所有表,請使用以下語句:

mysql> SHOW TABLES LIKE 'p%';
+-------------------------+
| Tables_in_yiibaidb (p%) |
+-------------------------+
| payments                |
| price_logs              |
| productlines            |
| products                |
+-------------------------+
4 rows in set

或者顯示以’es‘字串結尾的表,可使用以下語句:

mysql> SHOW TABLES LIKE '%es';
+--------------------------+
| Tables_in_yiibaidb (%es) |
+--------------------------+
| employees                |
| offices                  |
| productlines             |
+--------------------------+
3 rows in set

以下語句說明了如何在SHOW TABLES語句中使用WHERE子句列出yiibai資料庫中的所有檢視 -

mysql> SHOW FULL TABLES WHERE table_type = 'VIEW';
+--------------------+------------+
| Tables_in_yiibaidb | Table_type |
+--------------------+------------+
| aboveavgproducts   | VIEW       |
| bigsalesorder      | VIEW       |
| customerorders     | VIEW       |
| officeinfo         | VIEW       |
| organization       | VIEW       |
| saleperorder       | VIEW       |
| v_contacts         | VIEW       |
| view_contacts      | VIEW       |
| vps                | VIEW       |
+--------------------+------------+
9 rows in set

有時,希望看到非當前使用的資料庫中的表。可以使用SHOW TABLES語句的FROM子句來指定要顯示表的資料庫。

以下範例演示如何顯示以’time‘開頭的表;

mysql> SHOW TABLES FROM mysql LIKE 'time%';
+---------------------------+
| Tables_in_mysql (time%)   |
+---------------------------+
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
+---------------------------+
5 rows in set

以下語句相當於上面的語句,但它使用IN而不是FROM子句,如下所示 -

mysql> SHOW TABLES IN mysql LIKE 'time%';
+---------------------------+
| Tables_in_mysql (time%)   |
+---------------------------+
| time_zone                 |
| time_zone_leap_second     |
| time_zone_name            |
| time_zone_transition      |
| time_zone_transition_type |
+---------------------------+
5 rows in set

請注意,如果您沒有基表或檢視的許可權,則它不會顯示在SHOW TABLES命令的結果集中。

在本教學中,您已經學習了如何使用MySQL SHOW TABLES語句列出指定資料庫中的所有表。