How to delete old WADMetrics tables automatically from Tables storage account

@Annabathina Venkateswarlu Welcome to Microsoft Q&A Forum, Thank you for posting your query here!

To delete Diagnostic logs (WADMetric) tables stored in an Azure Table Storage account automatically, you can use Azure Functions with a Timer Trigger.

Here are the high-level steps to implement this solution:

1. Create an Azure Function with a Timer Trigger that runs on a schedule (e.g., daily, weekly, etc.).
2. Use the Azure Storage SDK to connect to the Azure Table Storage account and retrieve a list of tables.
3. Loop through the list of tables and delete the tables that match the naming pattern for the Diagnostic logs (WADMetric) tables.
4. Schedule the Azure Function to run on a regular basis to automatically delete the tables.

Here is some sample code that demonstrates how to delete tables in an Azure Table Storage account using the Azure Storage SDK:

using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Table;

public static async Task Run(TimerInfo myTimer, ILogger log)
{
    // Retrieve the connection string for the storage account
    string storageConnectionString = Environment.GetEnvironmentVariable("AzureWebJobsStorage");

    // Create a CloudStorageAccount object from the connection string
    CloudStorageAccount storageAccount = CloudStorageAccount.Parse(storageConnectionString);

    // Create a CloudTableClient object from the storage account
    CloudTableClient tableClient = storageAccount.CreateCloudTableClient();

    // Retrieve a list of tables in the storage account
    TableContinuationToken continuationToken = null;
    do
    {
        var tableResult = await tableClient.ListTablesSegmentedAsync("WADMetricsPT1MP10DV2S", continuationToken);
        continuationToken = tableResult.ContinuationToken;
        foreach (var table in tableResult.Results)
        {
            // Delete the table if it matches the naming pattern for the Diagnostic logs (WADMetric) tables
            if (table.Name.StartsWith("WADMetrics"))
            {
                await table.DeleteIfExistsAsync();
                log.LogInformation($"Deleted table {table.Name}");
            }
        }
    } while (continuationToken != null);
}

In this example, the code retrieves a list of tables in the storage account and loops through the list to delete any tables that match the naming pattern for the Diagnostic logs (WADMetric) tables. The code logs a message for each table that is deleted.

You can modify this code to match the naming pattern for your Diagnostic logs (WADMetric) tables and schedule the Azure Function to run on a regular basis

Query the Tables: Use a script to query the tables that need to be deleted based on a certain condition, such as the date or name pattern.

1. Batch Deletion: Utilize Azure Storage PowerShell cmdlets to perform batch deletions. You can use the Remove-AzStorageTable cmdlet to remove tables from your storage account.
2. Automation: To handle multiple storage accounts, you can create a script that iterates over each storage account and performs the deletion process.
3. Scheduling: Use Azure Automation or a similar service to schedule the PowerShell script to run at regular intervals, ensuring that the tables are deleted automatically without manual intervention.

There is a similar discussion thread on the Stack Overflow forum. Please refer to the suggestions mentioned in that thread, which should provide some insights into your query.

AzureDiagnosticsCleanup :A utility to clean up Azure Diagnostics logs tables in an Azure Storage Account. Over time the diagnostics tables can grow to a large size, and they are not automatically trimmed.
Managing Azure Table Storage: Delete Table Entities using Logic APPS

Please let us know if you have any further queries. I’m happy to assist you further.    

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