我們創建好了數據表，那么我們該怎么去查看數據表列表呢？
一、查看數據表列表的語法結構
SHOW TABLES [FROM db_name] [LIKE ‘pattern’ | WHERE expr]
FROM db_name表示，我們不僅可以查看當前數據庫里的數據表，還可以查看別的數據庫里的數據表
mysql> show tables;
+----------------+
| Tables_in_test |
+----------------+
| tb1 |
+----------------+
1 row in set (0.00 sec)
mysql>
mysql> show tables from mysql;
+---------------------------+
| Tables_in_mysql |
+---------------------------+
| columns_priv |
| db |
| func |
| help_category |
| help_keyword |
| help_relation |
| help_topic |
| host |
| proc |
| procs_priv |
| tables_priv |
| time_zone |
| time_zone_leap_second |
| time_zone_name |
| time_zone_transition |
| time_zone_transition_type |
| user |
+---------------------------+
17 rows in set (0.01 sec)
mysql>
驗證用戶打開的是哪個數據庫
可見，還是在我們test這個數據庫下，可以既能查看到test本身的數據表，還能查看到別的數據庫里的數據表。
二、查看數據表結構的語法
SHOW COLUMNS FROM tbl_name
mysql> show columns from tb1;
+----------+---------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+---------------------+------+-----+---------+-------+
| username | varchar(20) | YES | | NULL | |
| age | tinyint(3) unsigned | YES | | NULL | |
| salaty | float(8,2) unsigned | YES | | NULL | |
+----------+---------------------+------+-----+---------+-------+
3 rows in set (0.01 sec)