Sankalan Tech Insights

Nov 9, 20264 min read

SQL Tutorial: Clean Messy Employee Names Using TRIM(), LOWER(), and INITCAP()

Oracle SQL Tutorial: Clean Messy Employee Names Using TRIM(), LOWER(), and INITCAP() When working with employee data, you may come across names that are stored in different formats. Some names might

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SQL: WHERE, ORDER BY, and LIMIT — Why Your Query May Return the Wrong Employees
A SQL query can run successfully and still return the wrong result. Imagine your manager asks you to find the three highest-paid employees in the IT department. You write a query, execute it, and get
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SQL Filtering and Sorting: 5 Mistakes That Can Change Your Query Results
A SQL query can execute without errors and still produce an unexpected result. It might return the wrong employees, sort salaries incorrectly, or select the wrong three records. The problem often lies
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SQL SELECT Statement: Practical Examples for Beginners and Interview Preparation
The "SELECT" statement is one of the first things you learn when working with SQL. But knowing the syntax is only the beginning. In real projects, you need to retrieve the right columns, filter record
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A Single SQL Constraint Can Save Your Database From Bad Data — Do You Know Which One?
A Single SQL Constraint Can Save Your Database From Bad Data Imagine an order references a customer who doesn't exist. Your reports become unreliable, your joins return unexpected results, and debuggi
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Strings in Java
Understanding Strings in Java: A Beginner-Friendly Guide with Real Examples If you're learning Java or preparing for an interview, one of the most important topics you’ll come across is Strings. Strings are used everywhere in Java programs—whether yo...
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Understand Array in java with Examples and Practical Example
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Sankalan Tech Insights

Latest articles

SQL Tutorial: Clean Messy Employee Names Using TRIM(), LOWER(), and INITCAP()

Can You Find Employees Who Joined This Month Using SQL? (Oracle TRUNC & ADD_MONTHS)

SQL Challenge: Why Is Your SQL Query Still Returning NULL?

SQL Challenge: How to Get Employee Names and Department Names Using JOIN

SQL EXISTS vs JOIN: Find Customers Who Have Placed an Order

SQL: WHERE, ORDER BY, and LIMIT — Why Your Query May Return the Wrong Employees

SQL Filtering and Sorting: 5 Mistakes That Can Change Your Query Results

SQL SELECT Statement: Practical Examples for Beginners and Interview Preparation

A Single SQL Constraint Can Save Your Database From Bad Data — Do You Know Which One?

Strings in Java

Exploring Arrays in Java A Deep Dive