在本教程中,您将学习如何使用MySQL SHOW TABLES命令查询特定数据库中的表。
要在MySQL数据库中列出所有表,请按照下列步骤操作:
使用MySQL客户端(如mysql)登录到MySQL数据库服务器
使用USE语句切换到特定的数据库。
使用SHOW TABLES命令。
下面说明了MySQL SHOW TABLES命令的语法:
MySQL SHOW TABLES示例
以下示例说明如何列出yiibaidb数据库中的所有表。
步骤1 - 连接到MySQL数据库服务器:
C:\Users\Administrator>mysql
-u root -p |
步骤2 -切换到yiibaidb数据库:
mysql>
USE yiibaidb;
Database changed
mysql> |
步骤3 - 显示yiibaidb数据库中的所有表:
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命令可显示表是基表还是视图。 要在结果中包含表类型,请使用SHOW TABLES语句,如下所示
-
执行上面语句,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 |
我们在yiibaidb数据库中创建一个名为view_contacts的视图,其中包括来自employees和customers表的名字,姓氏和电话。
CREATE
VIEW view_contacts
AS
SELECT lastName, firstName, extension as phone
FROM employees
UNION
SELECT contactFirstName, contactLastName,
phone
FROM customers; |
现在,执行查询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等是视图(VIEW),而其它表则都是基表(BASE
TABLE)。
对于具有很多表的数据库,一次显示所有表可能不免直观。
幸运的是,SHOW TABLES命令提供了一个选项,允许使用LIKE运算符或WHERE子句中的表达式对返回的表进行过滤,如下所示:
SHOW
TABLES LIKE pattern;
SHOW TABLES WHERE expression; |
例如,要显示yiibaidb数据库中以字母p开头的所有表,请使用以下语句:
mysql>
SHOW TABLES LIKE 'p%';
+-------------------------+
| Tables_in_yiibaidb (p%) |
+-------------------------+
| payments |
| price_logs |
| productlines |
| products |
+-------------------------+
4 rows in set |
或者显示以’es‘字符串结尾的表,可使用以下语句:
mysql>
SHOW TABLES LIKE '%es';
+--------------------------+
| Tables_in_yiibaidb (%es) |
+--------------------------+
| employees |
| offices |
| productlines |
+--------------------------+
3 rows in set |
以下语句说明了如何在SHOW TABLES语句中使用WHERE子句列出yiibai数据库中的所有视图
-
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 |
有时,希望看到非当前使用的数据库中的表。可以使用SHOW TABLES语句的FROM子句来指定要显示表的数据库。
以下示例演示如何显示以’time‘开头的表;
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 |
以下语句相当于上面的语句,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 |
请注意,如果您没有基表或视图的权限,则它不会显示在SHOW TABLES命令的结果集中。
在本教程中,您已经学习了如何使用MySQL SHOW TABLES语句列出指定数据库中的所有表。 |