@iamsanthoshrajeru

santhosh rajeru

@iamsanthoshrajeruNoida, IndiaJoined January 2025

Mainframe Developer with expertise in Cobol, Jcl, Db2, Vsam and CICS. Focused on automation, performance and development.

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santhosh rajeru's blogs

Mainframeslearnmainframes.hashnode.dev15 posts EC2 instance through Windowsec2-instance-through-windows.hashnode.dev3 posts

GitHub with Git in WSL (Ubuntu)

To configure GitHub using the WSL terminal in Visual Studio (VS Code), follow these steps. This will allow you to clone, commit, push, and pull repositories using Git from your WSL environment. ✅ Step-by-Step Setup: GitHub with Git in WSL (Ubuntu) �...

Jun 16, 2025 · 2 min readlearnmainframes.hashnode.dev

Real-World SQL Joins Explained with Modern App Examples (Instagram, Facebook, Google, Amazon)

Understanding SQL joins is crucial for any developer or data analyst. To make them more relatable, let’s look at how apps like Instagram, Facebook, Google Ads, YouTube, and Amazon use various SQL join types in their backend systems. 1. INNER JOIN – ...

Jun 11, 2025 · 3 min readlearnmainframes.hashnode.dev

🔄 Mastering FOR UPDATE OF and WHERE CURRENT OF in COBOL-DB2: Real-World Use Case + Pitfalls

Great! Here's your ready-to-post LinkedIn blog article — complete with clear formatting, emojis, and hashtags to boost engagement. You can also use this on Medium or your personal blog. As mainframe developers, we often need to fetch and update rows...

Jun 8, 2025 · 3 min readlearnmainframes.hashnode.dev

Abends

Abend S322 - Time abend due to exceeded the alloted CPU time. ABENDU0102 - missing systsprt dd statement.

Jun 8, 2025 · 1 min readlearnmainframes.hashnode.dev

Bank Transaction Processing System

Here's a **Bank Transaction Processing System** project that combines COBOL, PL/SQL, and Unix/Linux. This project demonstrates legacy system integration, batch processing, and database management. ### **Project Overview** A banking system that proces...

Jun 8, 2025 · 3 min readlearnmainframes.hashnode.dev

santhosh rajeru

About

Available for

santhosh rajeru's blogs

GitHub with Git in WSL (Ubuntu)

Real-World SQL Joins Explained with Modern App Examples (Instagram, Facebook, Google, Amazon)

🔄 Mastering FOR UPDATE OF and WHERE CURRENT OF in COBOL-DB2: Real-World Use Case + Pitfalls

Abends

Bank Transaction Processing System

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santhosh rajeru

About

Available for

santhosh rajeru's blogs

GitHub with Git in WSL (Ubuntu)

Real-World SQL Joins Explained with Modern App Examples (Instagram, Facebook, Google, Amazon)

🔄 Mastering FOR UPDATE OF and WHERE CURRENT OF in COBOL-DB2: Real-World Use Case + Pitfalls

Abends

Bank Transaction Processing System