Scripts

Technical Article

Real-Time SQL Server to BigQuery Streaming ETL using CDC

CDC Changes: The script queries the CDC tables in SQL Server to retrieve the changes (inserts, updates, deletes) since the last sync. Each change is processed with a mapped operation type (INSERT, UPDATE, DELETE).
Real-Time Streaming to BigQuery: The captured changes are streamed directly to BigQuery using its real-time insert_rows_json method, avoiding the need for batch uploads via Google Cloud Storage.
Tracking Last Sync Time: The script tracks the last synchronization time and updates it after every successful sync, ensuring no data is missed.
Low Latency: By continuously querying the CDC tables and streaming the changes, the script achieves near real-time data synchronization.

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2024-11-13 (first published: )

258 reads

Technical Article

Concatenating Multiple Row Values into a Single Comma-Separated List

In scenarios where you need to consolidate multiple rows into a single, comma-separated value, you can achieve this using FOR XML PATH. This script demonstrates how to retrieve volunteer data and display the days they have selected for participation.

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2024-11-11 (first published: )

508 reads

Technical Article

While Loop in T-SQL

Often, we encounter situations where we need to loop through a dataset to process or update records iteratively. In such cases, I use WHILE loop like below. The example below demonstrates how a WHILE loop can be used to iterate Sales records. This approach is particularly effective when working with a numerical or date column, […]

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2024-10-15

177 reads

Technical Article

Comprehensive SQL Performance Monitoring and Optimisation Script

This script monitors and reports the execution statistics of SQL statements over a specified period, capturing metrics such as execution counts, CPU time, I/O operations, and elapsed time. It provides a comprehensive view of query performance, aiding in the diagnosis of performance issues and identifying problematic SQL queries in the database.

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2024-07-29 (first published: )

1,360 reads

Technical Article

Creating a CSV Parser in Apex

Salesforce supports the conversion of only csv files utilizing Apex. However if you use their LWC - js platform that provides wide options to bring in libraries to parse all kinds of file types. Here in this script i would be providing basic idea of functions utilizing the parsing logic along with options to iterate […]

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2024-05-21

8,155 reads

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Question of the Day

Subqueries II

What is wrong (if anything) with this code?

SELECT *
 FROM Sales.SalesOrderHeader AS soh 
 WHERE customerid IN (SELECT soh.CustomerID 
                       FROM Sales.Customer AS C
   WHERE soh.CurrencyRateID = 1
   ORDER BY c.ModifiedDate)

See possible answers