要获得与亚马逊 Timestream 类似的功能 LiveAnalytics，可以考虑适用于 InfluxDB 的亚马逊 Timestream。适用于 InfluxDB 的 Amazon Timestream 提供简化的数据摄取和个位数毫秒级的查询响应时间，以实现实时分析。点击[此处](https://docs.aws.amazon.com//timestream/latest/developerguide/timestream-for-influxdb.html)了解更多信息。

本文属于机器翻译版本。若本译文内容与英语原文存在差异，则一律以英文原文为准。

# 创建数据库
<a name="code-samples.create-db"></a>

可使用以下代码段创建数据库。

**注意**  
这些代码段基于 [GitHub](https://github.com/awslabs/amazon-timestream-tools/blob/master/sample_apps) 上的完整示例应用程序。有关如何开始使用示例应用程序的更多信息，请参阅 [示例应用程序](sample-apps.md)。

------
#### [  Java  ]

```
   public void createDatabase() {
        System.out.println("Creating database");
        CreateDatabaseRequest request = new CreateDatabaseRequest();
        request.setDatabaseName(DATABASE_NAME);
        try {
            amazonTimestreamWrite.createDatabase(request);
            System.out.println("Database [" + DATABASE_NAME + "] created successfully");
        } catch (ConflictException e) {
            System.out.println("Database [" + DATABASE_NAME + "] exists. Skipping database creation");
        }
    }
```

------
#### [  Java v2  ]

```
    public void createDatabase() {
        System.out.println("Creating database");
        CreateDatabaseRequest request = CreateDatabaseRequest.builder().databaseName(DATABASE_NAME).build();
        try {
            timestreamWriteClient.createDatabase(request);
            System.out.println("Database [" + DATABASE_NAME + "] created successfully");
        } catch (ConflictException e) {
            System.out.println("Database [" + DATABASE_NAME + "] exists. Skipping database creation");
        }
    }
```

------
#### [  Go  ]

```
// Create database.
    createDatabaseInput := &timestreamwrite.CreateDatabaseInput{
        DatabaseName: aws.String(*databaseName),
    }

    _, err = writeSvc.CreateDatabase(createDatabaseInput)

    if err != nil {
        fmt.Println("Error:")
        fmt.Println(err)
    } else {
        fmt.Println("Database successfully created")
    }

    fmt.Println("Describing the database, hit enter to continue")
```

------
#### [  Python  ]

```
    def create_database(self):
        print("Creating Database")
        try:
            self.client.create_database(DatabaseName=Constant.DATABASE_NAME)
            print("Database [%s] created successfully." % Constant.DATABASE_NAME)
        except self.client.exceptions.ConflictException:
            print("Database [%s] exists. Skipping database creation" % Constant.DATABASE_NAME)
        except Exception as err:
            print("Create database failed:", err)
```

------
#### [  Node.js  ]

以下代码段使用 AWS SDK for JavaScript v3。有关如何安装客户端和使用情况的更多信息，请参阅 [Timestream 写入客户端：AWS SDK for JavaScript v3](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-timestream-write/index.html)。

另请参阅 [Class CreateDatabaseCommand](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-timestream-write/classes/createdatabasecommand.html) 和 [CreateDatabase](https://docs.aws.amazon.com/timestream/latest/developerguide/API_CreateDatabase.html)。

```
import { TimestreamWriteClient, CreateDatabaseCommand } from "@aws-sdk/client-timestream-write";
const writeClient = new TimestreamWriteClient({ region: "us-east-1" });

const params = {
    DatabaseName: "testDbFromNode"
};

const command = new CreateDatabaseCommand(params);

try {
    const data = await writeClient.send(command);
    console.log(`Database ${data.Database.DatabaseName} created successfully`);
} catch (error) {
    if (error.code === 'ConflictException') {
        console.log(`Database ${params.DatabaseName} already exists. Skipping creation.`);
    } else {
        console.log("Error creating database", error);
    }
}
```

以下代码段使用 AWS SDK for JavaScript V2 风格。该代码段基于示例应用程序，该应用程序位于 [GitHub 上的 Node.js 示例适用于 LiveAnalytics 的 Amazon Timestream 应用程序](https://github.com/awslabs/amazon-timestream-tools/tree/mainline/sample_apps/js)。

```
async function createDatabase() {
    console.log("Creating Database");
    const params = {
        DatabaseName: constants.DATABASE_NAME
    };
 
    const promise = writeClient.createDatabase(params).promise();
 
    await promise.then(
        (data) => {
            console.log(`Database ${data.Database.DatabaseName} created successfully`);
        },
        (err) => {
            if (err.code === 'ConflictException') {
                console.log(`Database ${params.DatabaseName} already exists. Skipping creation.`);
            } else {
                console.log("Error creating database", err);
            }
        }
    );
}
```

------
#### [  .NET  ]

```
        public async Task CreateDatabase()
        {
            Console.WriteLine("Creating Database");

            try
            {
                var createDatabaseRequest = new CreateDatabaseRequest
                {
                    DatabaseName = Constants.DATABASE_NAME
                };
                CreateDatabaseResponse response = await writeClient.CreateDatabaseAsync(createDatabaseRequest);
                Console.WriteLine($"Database {Constants.DATABASE_NAME} created");
            }
            catch (ConflictException)
            {
                Console.WriteLine("Database already exists.");
            }
            catch (Exception e)
            {
                Console.WriteLine("Create database failed:" + e.ToString());
            }

        }
```

------