Cosmos DB Connector for PowerShell

Connect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!

In this article you will learn how to quickly and efficiently integrate Cosmos DB data in PowerShell without coding. We will use high-performance Cosmos DB Connector to easily connect to Cosmos DB and then access the data inside PowerShell.

Let's follow the steps below to see how we can accomplish that!

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Create ODBC Data Source (DSN) based on ZappySys API Driver

Step-by-step instructions

To get data from Cosmos DB using PowerShell we first need to create a DSN (Data Source) which will access data from Cosmos DB. We will later be able to read data using PowerShell. Perform these steps:

  1. Download and install ODBC PowerPack.

  2. Open ODBC Data Sources (x64):

    Open ODBC Data Source
  3. Create a User data source (User DSN) based on ZappySys API Driver

    ZappySys API Driver
    Create new User DSN for ZappySys API Driver
    • Create and use User DSN if the client application is run under a User Account. This is an ideal option in design-time, when developing a solution, e.g. in Visual Studio 2019. Use it for both type of applications - 64-bit and 32-bit.
    • Create and use System DSN if the client application is launched under a System Account, e.g. as a Windows Service. Usually, this is an ideal option to use in a production environment. Use ODBC Data Source Administrator (32-bit), instead of 64-bit version, if Windows Service is a 32-bit application.
  4. When the Configuration window appears give your data source a name if you haven't done that already, then select "Cosmos DB" from the list of Popular Connectors. If "Cosmos DB" is not present in the list, then click "Search Online" and download it. Then set the path to the location where you downloaded it. Finally, click Continue >> to proceed with configuring the DSN:

    CosmosDbDSN
    Cosmos DB
    ODBC DSN Template Selection
  5. Now it's time to configure the Connection Manager. Select Authentication Type, e.g. Token Authentication. Then select API Base URL (in most cases, the default one is the right one). More info is available in the Authentication section.

    Steps how to get and use Cosmos DB credentials : API Key [Http]
    Connecting to your Azure Cosmos DB data requires you to authenticate your REST API access. Follow the instructions below:
    1. Go to your Azure portal homepage: https://portal.azure.com/.
    2. In the search bar at the top of the homepage, enter Azure Cosmos DB. In the dropdown that appears, select Azure Cosmos DB.
    3. Click on the name of the database account you want to connect to (also copy and paste the name of the database account for later use).
    4. On the next page where you can see all of the database account information, look along the left side and select Keys: Use API key to get Cosmos DB data via REST API in Azure
    5. On the Keys page, you will have two tabs: Read-write Keys and Read-only Keys. If you are going to write data to your database, you need to remain on the Read-write Keys tab. If you are only going to read data from your database, you should select the Read-only Keys tab.
    6. On the Keys page, copy the PRIMARY KEY value and paste it somewhere for later use (the SECONDARY KEY value may also be copied and used).
    7. Now go to SSIS package or ODBC data source and use this PRIMARY KEY in API Key authentication configuration.
    8. Enter the primary or secondary key you recorded in step 6 into the Primary or Secondary Key field.
    9. Then enter the database account you recorded in step 3 into the Database Account field.
    10. Next, enter or select the default database you want to connect to using the Defualt Database field.
    11. Continue by entering or selecting the default table (i.e. container/collection) you want to connect to using the Default Table (Container/Collection) field.
    12. Select the Test Connection button at the bottom of the window to verify proper connectivity with your Azure Devops account.
    13. If the connection test succeeds, select OK.
    14. Done! Now you are ready to use Asana Connector!

    Fill in all required parameters and set optional parameters if needed:

    CosmosDbDSN
    Cosmos DB
    API Key [Http]
    https://[$Account$].documents.azure.com
    Required Parameters
    Primary or Secondary Key Fill-in the parameter...
    Account Name (Case-Sensitive) Fill-in the parameter...
    Database Name (keep blank to use default) Case-Sensitive Fill-in the parameter...
    API Version Fill-in the parameter...
    Optional Parameters
    Default Table (needed to invoke #DirectSQL)
    ODBC DSN HTTP Connection Configuration

  6. Once the data source connection has been configured, it's time to configure the SQL query. Select the Preview tab and then click Query Builder button to configure the SQL query:

    ZappySys API Driver - Cosmos DB
    Connect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!
    CosmosDbDSN
    Open Query Builder in API ODBC Driver to read and write data to REST API
  7. Start by selecting the Table or Endpoint you are interested in and then configure the parameters. This will generate a query that we will use in PowerShell to retrieve data from Cosmos DB. Hit OK button to use this query in the next step.

    #DirectSQL SELECT * FROM root where root.id !=null order by root._ts desc
    Configure table/endpoint parameters in ODBC data source based on API Driver
    Some parameters configured in this window will be passed to the Cosmos DB API, e.g. filtering parameters. It means that filtering will be done on the server side (instead of the client side), enabling you to get only the meaningful data much faster.
  8. Now hit Preview Data button to preview the data using the generated SQL query. If you are satisfied with the result, use this query in PowerShell:

    ZappySys API Driver - Cosmos DB
    Connect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!
    CosmosDbDSN
    #DirectSQL SELECT * FROM root where root.id !=null order by root._ts desc
    API ODBC Driver-based data source data preview
    You can also access data quickly from the tables dropdown by selecting <Select table>.
    A WHERE clause, LIMIT keyword will be performed on the client side, meaning that the whole result set will be retrieved from the Cosmos DB API first, and only then the filtering will be applied to the data. If possible, it is recommended to use parameters in Query Builder to filter the data on the server side (in Cosmos DB servers).
  9. Click OK to finish creating the data source.

Video Tutorial

Read Cosmos DB data in PowerShell

Sometimes, you need to quickly access and work with your Cosmos DB data in PowerShell. Whether you need a quick data overview or the complete dataset, this article will guide you through the process. Here are some common scenarios:

Viewing data in a terminal
  • Quickly peek at Cosmos DB data
  • Monitor data constantly in your console
Saving data to a file
  • Export data to a CSV file so that it can be sliced and diced in Excel
  • Export data to a JSON file so that it can ingested by other processes
  • Export data to an HTML file for user-friendly view and easy sharing
  • Create a schedule to make it an automatic process
Saving data to a database
  • Store data internally for analysis or for further ETL processes
  • Create a schedule to make it an automatic process
Sending data to another API
  • Integrate data with other systems via external APIs

In this article, we will delve deeper into how to quickly view the data in PowerShell terminal and how to save it to a file. But let's stop talking and get started!

Reading individual fields

  1. Open your favorite PowerShell IDE (we are using Visual Studio Code).
  2. Then simply follow these instructions:
    "DSN=CosmosDbDSN"
    Read API data with PowerShell using ODBC DSN in Visual Code

    For your convenience, here is the whole PowerShell script:

    # Configure connection string and query
    $connectionString = "DSN=CosmosDbDSN"
    $query = "SELECT * FROM Customers"
    
    # Instantiate OdbcDataAdapter and DataTable
    $adapter = New-Object System.Data.Odbc.OdbcDataAdapter($query, $connectionString)
    $table = New-Object System.Data.DataTable
    
    # Fill the table with data
    $adapter.Fill($table)
    
    # Since we know we will be reading just 4 columns, let's define format for those 4 columns, each separated by a tab
    $format = "{0}`t{1}`t{2}`t{3}"
    
    # Display data in the console
    foreach ($row in $table.Rows)
    {
        # Construct line based on the format and individual Cosmos DB fields
        $line = $format -f ($row["CustomerId"], $row["CompanyName"], $row["Country"], $row["Phone"])
        Write-Host $line
    }
    
    Access specific Cosmos DB table field using this code snippet:
    $field = $row["ColumnName"]
    You will find more info on how to manipulate DataTable.Rows property in Microsoft .NET reference.
    For demonstration purposes we are using sample tables which may not be available in Cosmos DB.
  3. To read values in a console, save the script to a file and then execute this command inside PowerShell terminal: Read API data in PowerShell using ODBC DSN
    You can also use even a simpler command inside the terminal, e.g.:
    . 'C:\Users\john\Documents\dsn.ps1'

Retrieving all fields

However, there might be case, when you want to retrieve all columns of a query. Here is how you do it:

"DSN=CosmosDbDSN"
Read all API columns from ODBC data source in PowerShell

Again, for your convenience, here is the whole PowerShell script:

# Configure connection string and query
$connectionString = "DSN=CosmosDbDSN"
$query = "SELECT CustomerId, CompanyName, Country, Phone FROM Customers"

# Instantiate OdbcDataAdapter and DataTable
$adapter = New-Object System.Data.Odbc.OdbcDataAdapter($query, $connectionString)
$table = New-Object System.Data.DataTable

# Fill the table with data
$adapter.Fill($table)

# Display data in the console
foreach ($row in $table.Rows) {
    $line = ""
    foreach ($column in $table.Columns) {
        $value = $row[$column.ColumnName]

        # Let's handle NULL values
        if ($value -is [DBNull])
        {
            $value = "(NULL)"
        }
        $line += $value + "`t"
    }
    Write-Host $line
}
You can limit the numbers of lines to retrieve by using a LIMIT keyword in the query, e.g.:
SELECT * FROM Customers LIMIT 10

Using a full ODBC connection string

In the previous steps we used a very short format of ODBC connection string - a DSN. Yet sometimes you don't want a dependency on an ODBC data source (and an extra step). In those times, you can define a full connection string and skip creating an ODBC data source entirely. Let's see below how to accomplish that in the below steps:

  1. Open ODBC data source configuration and click Copy settings:
    ZappySys API Driver - Configuration [Version: 2.0.1.10418]
    ZappySys API Driver - Cosmos DB
    Connect to your Azure Cosmos DB databases to read, query, create, update, and delete documents and more!
    CosmosDbDSN
    Copy connection string for ODBC application
  2. The window opens, telling us the connection string was successfully copied to the clipboard: Successful connection string copying for ODBC application
  3. Then just paste the connection string into your script: Paste ODBC connection string in PowerShell to read API data
  4. You are good to go! The script will execute the same way as using a DSN.

Have in mind that a full connection string has length limitations.

Proceed to the next step to find out the details.

Limitations of using a full connection string

Despite using a full ODBC connection string may be very convenient it comes with a limitation: it's length is limited to 1024 symbols (or sometimes more). It usually happens when API provider generates a very long Refresh Token when OAuth is at play. If you are using such a long ODBC connection string, you may get this error:

"Connection string exceeds maximum allowed length of 1024"

But there is a solution to this by storing the full connection string in a file. Follow the steps below to achieve this:

  1. Open your ODBC data source.
  2. Click Copy settings button to copy a full connection string (see the previous section on how to accomplish that).
  3. Then create a new file, let's say, in C:\temp\odbc-connection-string.txt.
  4. Continue by pasting the copied connection string into a newly created file and save it.
  5. Finally, the last step! Just construct a shorter ODBC connection string using this format:
    DRIVER={ZappySys API Driver};SettingsFile=C:\temp\odbc-connection-string.txt
  6. Our troubles are over! Now you should be able to use this connection string in PowerShell with no problems.
This feature requires ODBC PowerPack v1.9.0 or later.

Write Cosmos DB data to a file in PowerShell

Save data to a CSV file

Export data to a CSV file so that it can be sliced and diced in Excel:

# Configure connection string and query
$connectionString = "DSN=CosmosDbDSN"
$query = "SELECT * FROM Customers"

# Instantiate OdbcDataAdapter and DataTable
$adapter = New-Object System.Data.Odbc.OdbcDataAdapter($query, $connectionString)
$table = New-Object System.Data.DataTable

# Fill the table with data
$adapter.Fill($table)

# Export table data to a file
$table | ConvertTo-Csv -NoTypeInformation -Delimiter "`t" | Out-File "C:\Users\john\saved-data.csv" -Force

Save data to a JSON file

Export data to a JSON file so that it can ingested by other processes (use the above script, but change this part):

# Export table data to a file
$table | ConvertTo-Json | Out-File "C:\Users\john\saved-data.json" -Force

Save data to an HTML file

Export data to an HTML file for user-friendly view and easy sharing (use the above script, but change this part):

# Export table data to a file
$table | ConvertTo-Html | Out-File "C:\Users\john\saved-data.html" -Force
Check useful PowerShell cmdlets other than ConvertTo-Csv, ConvertTo-Json, and ConvertTo-Html for other data manipulation scenarios.

Actions supported by Cosmos DB Connector

Learn how to perform common Cosmos DB actions directly in PowerShell with these how-to guides:

Conclusion

In this article we showed you how to connect to Cosmos DB in PowerShell and integrate data without any coding, saving you time and effort. It's worth noting that ZappySys API Driver allows you to connect not only to Cosmos DB, but to any Java application that supports JDBC (just use a different JDBC driver and configure it appropriately).

We encourage you to download Cosmos DB Connector for PowerShell and see how easy it is to use it for yourself or your team.

If you have any questions, feel free to contact ZappySys support team. You can also open a live chat immediately by clicking on the chat icon below.

Download Cosmos DB Connector for PowerShell Documentation

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