sql

Window functions execute calculations over a defined range of rows related to the current row, enabling advanced data analysis without requiring subqueries. Unlike aggregate functions, which typically return a single value for a group of rows, Window functions return a... Read more

Functions in SQL allow for more sophisticated data manipulation and retrieval, enhancing the capability of your queries. This article covers various types of functions: Aggregate Functions, NULL Functions, String Functions, Mathematical Functions, and Date Functions. 1. Aggregate Functions Aggregate functions... Read more

In SQL, advanced data retrieval techniques allow users to extract specific data from databases with enhanced precision and flexibility. This article covers SELECT TOP and BOTTOM, LIKE and Wildcards, and IN and BETWEEN, providing detailed explanations and scenarios for each... Read more

Managing data in a database involves various operations, including inserting new records, updating existing records, and deleting records. Additionally, the MERGE statement allows for a more efficient way to perform upserts (inserts or updates). In this section, we will explore... Read more

Once you retrieve data from a database, you often need to sort and filter it to extract meaningful insights. SQL provides powerful features to help you do just that. In this section, we will explore how to sort data using... Read more

One of the core operations in SQL is fetching data from a database. SQL provides several powerful clauses and keywords to retrieve and filter data efficiently. In this section, we’ll explore basic data retrieval using the SELECT statement, along with... Read more

In SQL, Indexes are like the table of contents in a book—while the data is still there, an index helps you locate it much faster. Instead of reading every page to find what you’re looking for, you can skip directly... Read more

In Part 1 of “Dates in SQL,” we explored foundational concepts, such as extracting date parts, performing date arithmetic, and formatting dates. Part 2 delves deeper into advanced date operations, covering areas not discussed earlier. This includes working with time... Read more

Working with dates in SQL can often be tricky due to different formats and the need for precise matching between the date value and the column type. This article explores how to manage dates across various SQL databases, covering date... Read more

Triggers are a powerful feature in SQL used to automatically execute a predefined set of actions when specific events occur in a database. They help enforce business rules, maintain data integrity, and automate repetitive tasks. What are Triggers in SQL?... Read more