SQL

When dealing with date information arriving in string format, the date conversion data types become essential. In SQL, date conversion from string to date  can be done using functions like CAST or CONVERT (e.g., SELECT CAST(‘2023-12-27’ AS DATE) AS ConvertedDate;). Some databases offer alternatives like PARSE or TO_DATE for converting string dates with specific formats,…

Comparing dates without times is a common need when working with SQL databases. Luckily there are several methods and built-in functions to compare dates in SQL without factoring in the time portion But sometimes you just want to focus on the date component for your queries and analysis.  This guide will talk about various techniques…

Strings in SQL database can be a mix of Numbers, symbols, and maybe even hidden letters. CHARINDEX(), PATINDEX(), and LIKE operators are used to uncover alphabetic characters within strings. This article will provide a comprehensive guide on different methods to check if a string contains letters in SQL Server.  Why and How to Check for…

When working with numbers in SQL Server, there are times when you need values to be rounded down to the nearest whole number. The FLOOR function comes in handy for this task.  It’s a tool within SQL Server that takes any number you give it and chops off the decimal part, always returning the largest…

Microsoft SQL Server is a powerful relational database management system (RDBMS) widely used for storing and managing data. If you’re using Windows 10 and need to determine whether SQL Server is installed on your system, there are several methods to verify its presence.  You can check directly from the library of installed programs through the…

Calculating correlation in SQL enables the assessment of relationships between variables within a dataset. Correlation measures the strength and direction of the linear relationship between two numeric columns in a table. By leveraging SQL functions and methods, such as mathematical calculations and aggregation, you can determine how changes in one variable correspond to changes in…

Introducing the utilization of the SQL “FLOOR” function, this guide aims to explore its practical application in manipulating numerical data within database queries. The “FLOOR” function plays a pivotal role in rounding down numeric values to the nearest integer or specified decimal place, offering a crucial tool for precise calculations and data analysis in SQL…

Azure Table Storage is categorized as a NoSQL data store, functioning primarily as a key-value repository. Azure Table Storage stands as a distinctive NoSQL solution within Azure’s ecosystem, offering unparalleled scalability and adaptability. Unlike traditional databases, it operates without a fixed schema, making it ideal for handling diverse data types. In this article, we’ll focus…

Sequence numbers provide a unique identifier for each row in a result set, allowing for easier data analysis and manipulation. There are a tons of methods by following which we can generate sequence number in SQL Select Query including using ROW_NUMBER() function, RANK() and DENSE_RANK() functions as well as using variables.  This content serves as…

Storing multiple pieces of data in a single column can be incredibly useful in SQL databases. This allows you to avoid creating excessive columns while still capturing all the necessary data.  In this comprehensive guide, we’ll explore several methods to insert multiple values in one SQL column. String Concatenation The simplest approach is to join…