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PySpark

substring() in PySpark

📌 What is substring() ? The substring() function in PySpark is used to extract a portion of a string from a column in a DataFrame. It is part of the PySpa…

substr substring substring() vs substr()
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Mar 19, 2026 2 min read
SQL

SQL Server Database Metadata Automation – Complete Dynamic Schema Capture Framework

Managing database schema changes manually becomes difficult as projects grow. Tables change, columns get added, constraints evolve, and documentation quickly...

Table create script db schema schema
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May 12, 2026 18 min read
SQL

SQL Server Deadlock & Performance Monitoring Made Easy

Introduction In SQL Server, performance issues are very common. Sometimes queries run slow, sometimes users get stuck, and sometimes the system becomes unres...

SQLServer DBA PerformanceTuning
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Mar 19, 2026 52 min read
PySpark

PySpark Built-in Functions

These functions are commonly used with groupBy() , agg() , or select() to compute things like sum, average, max, min, count, etc. PySpark functions come fr…

Aggregate apache spark for beginners big data tutorial
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Mar 19, 2026 2 min read
SQL

Split full name into first name and last name in SQL

Split full name into first name and last name : SELECT EmployeeName, CASE WHEN CHARINDEX(' ', EmployeeName) > 0 -- Check if there is a space (indicating…

microsoft programming sql-server
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Mar 19, 2026 1 min read
SQL

How to Two series with comma separate(any Delimiter) value split into in rows respectively

If we have two series with comma separate(any Delimiter) value and we want split into in rows, I have create function for that: IF OBJECT_ID('TF_SplitTwoSe…

comma saparate database mysql
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Mar 19, 2026 1 min read