USE

USE 语句可为用户会话选择当前数据库。

语法图

UseStmt:

DBName:

示例

mysql> USE mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
Database changed
mysql> SHOW TABLES;
+-+
| Tables_in_mysql      |
+-+
| GLOBAL_VARIABLES     |
| bind_info            |
| columns_priv         |
| db                   |
| default_roles        |
| gc_delete_range      |
| gc_delete_range_done |
| help_topic           |
| role_edges           |
| stats_buckets        |
| stats_feedback       |
| stats_histograms     |
| stats_meta           |
| tables_priv          |
| tidb                 |
| user                 |
+-+
16 rows in set (0.00 sec)
mysql> CREATE DATABASE newtest;
Query OK, 0 rows affected (0.10 sec)
mysql> USE newtest;
Database changed
mysql> SHOW TABLES;
Empty set (0.00 sec)
mysql> CREATE TABLE t1 (a int);
Query OK, 0 rows affected (0.10 sec)
mysql> SHOW TABLES;
+-+
| Tables_in_newtest |
+-+
| t1                |
+-+
1 row in set (0.00 sec)

MySQL 兼容性

USE 语句与 MySQL 完全兼容。如有任何兼容性差异，请在 GitHub 上提交 issue。

另请参阅

• CREATE DATABASE
• SHOW TABLES