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PowerShell Scripting to Replicate Open Exchange Rates Data to MySQL

Write a simple PowerShell script to replicate Open Exchange Rates data to a MySQL database.

The CData Cmdlets for Open Exchange Rates offer live access to Open Exchange Rates data from within PowerShell. Using PowerShell scripts, you can easily automate regular tasks like data replication. This article will walk through using the CData Cmdlets for Open Exchange Rates and the CData Cmdlets for MySQL in PowerShell to replicate Open Exchange Rates data to a MySQL database.

After obtaining the needed connection properties, accessing Open Exchange Rates data in PowerShell and preparing for replication consists of four basic steps.

The Open Exchange Rates API supports basic authentication with an App Id. After you register, your App Id is displayed in your account dashboard. Set this to the AppId connection property.

Collecting Open Exchange Rates Data

  1. Install the module:

    Install-Module OpenExchangeRatesCmdlets
  2. Connect to Open Exchange Rates:

    $openexchangerates = Connect-OpenExchangeRates -AppId $AppId
  3. Retrieve the data from a specific resource:

    $data = Select-OpenExchangeRates -Connection $openexchangerates -Table "Projects"

    You can also use the Invoke-OpenExchangeRates cmdlet to execute pure SQL-92 statements:

    $data = Invoke-OpenExchangeRates -Connection $openexchangerates -Query 'SELECT * FROM Projects WHERE Id = @Id' -Params @{'@Id'='MyProjectId'}
  4. Save a list of the column names from the returned data.

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name

Inserting Open Exchange Rates Data into the MySQL Database

With the data and column names collected, you are ready to replicate the data into a MySQL database.

  1. Install the module:

    Install-Module MySQLCmdlets
  2. Connect to MySQL, using the server address and port of the MySQL server, valid user credentials, and a specific database with the table in which the data will be replicated:

    $mysql = Connect-MySQL -User $User -Password $Password -Database $Database -Server $Server -Port $Port
  3. Loop through the Open Exchange Rates data, store the values, and use the Add-MySQL cmdlet to insert the data into the MySQL database, one row at a time. In this example, the table will need to have the same name as the Open Exchange Rates resource (Projects) and to exist in the database.

    $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Projects" -Columns $columns -Values $values }

You have now replicated your Open Exchange Rates data to a MySQL database. This gives you freedom to work with Open Exchange Rates data in the same way that you work with other MySQL tables, whether that is performing analytics, building reports, or other business functions.

Notes

  • Once you have connected to Open Exchange Rates and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

    Select-OpenExchangeRates -Connection $openexchangerates -Table "Projects" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Projects" -Columns $columns -Values $values }
  • If you wish to replicate the Open Exchange Rates data to another database using another PowerShell module, you will want to exclude the Columns, Connection, and Table columns from the data returned by the Select-OpenExchangeRates cmdlet since those columns are used to help pipe data from one CData cmdlet to another:

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name | ? {$_ -NotIn @('Columns','Connection','Table')}