sql-statement-use.md

title	summary	aliases
USE	TiDB 数据库中 USE 的使用概况。	/docs-cn/dev/sql-statements/sql-statement-use/ /docs-cn/dev/reference/sql/statements/use/

USE

USE 语句可为用户会话选择当前数据库。

语法图

UseStmt ::=
    "USE" DBName

DBName ::=
    Identifier

示例

{{< copyable "sql" >}}

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

{{< copyable "sql" >}}

SHOW TABLES;

+-------------------------+
| Tables_in_mysql         |
+-------------------------+
| GLOBAL_VARIABLES        |
| bind_info               |
| columns_priv            |
| db                      |
| default_roles           |
| expr_pushdown_blacklist |
| gc_delete_range         |
| gc_delete_range_done    |
| global_priv             |
| help_topic              |
| opt_rule_blacklist      |
| role_edges              |
| stats_buckets           |
| stats_feedback          |
| stats_histograms        |
| stats_meta              |
| stats_top_n             |
| tables_priv             |
| tidb                    |
| user                    |
+-------------------------+
20 rows in set (0.01 sec)

{{< copyable "sql" >}}

CREATE DATABASE newtest;

Query OK, 0 rows affected (0.10 sec)

{{< copyable "sql" >}}

USE newtest;

Database changed

{{< copyable "sql" >}}

SHOW TABLES;

Empty set (0.00 sec)

{{< copyable "sql" >}}

CREATE TABLE t1 (a int);

Query OK, 0 rows affected (0.10 sec)

{{< copyable "sql" >}}

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。如发现任何兼容性差异，请尝试 TiDB 支持资源。

另请参阅

• CREATE DATABASE
• SHOW TABLES