sql

When managing logistics and deliveries, keeping track of delivery time accuracy is crucial for customer satisfaction. This is especially important in industries like e-commerce, food delivery, or logistics, where customers…

Handling sensitive information, such as phone numbers, is crucial for maintaining user privacy in modern applications. One common requirement is to mask part of a phone number to protect user…

Introduction In SQL-based interviews or real-world database management tasks, querying data that involves comparisons between rows in the same table is a common challenge. One such problem is finding employees…