SQL-Query

170+ posts

SQL Query to Convert Rows to Columns in SQL Server

Last Updated: 16 December 2021

In this article we will see, how to convert Rows to Column in SQL Server. In a table where many columns have the have same data for many ent ...read more

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SQL-Query

How to Concat Two Columns Into One in MySQL?

Last Updated: 07 August 2024

Concatenating columns in MySQL is a key operation for combining data from multiple fields into a single, unified column. This process is ess...read more

SQL Query to Convert VARCHAR to INT

Last Updated: 08 January 2025

In SQL, converting data types is a common operation, and one of the most frequently required conversions is from VARCHAR to INT. This conver ...read more

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How to Write a SQL Query For a Specific Date Range and Date Time?

Last Updated: 16 December 2024

Managing date and time in SQL is a critical task for many real-world applications, especially when handling time-sensitive data such as logs...read more

SQL Query to Get Column Names From a Table

Last Updated: 10 October 2021

SQL stands for Structured Query Language. It is a language used to interact with the database, i.e to create a database, to create a table i...read more

SQL Query to Compare Two Dates

Last Updated: 26 September 2021

In SQL, dates are complicated for newbies, since while working with the database, the format of the date in the table must be matched with t ...read more

SQL Query to Check if Date is Greater Than Today in SQL

Last Updated: 18 December 2024

Managing dates effectively is critical in SQL for performing comparisons and scheduling. One common scenario is to check if a date in a data...read more

SQL Query to Delete Duplicate Rows

Last Updated: 14 April 2025

Duplicate rows in a database can cause inaccurate results, waste storage space, and slow down queries. Cleaning duplicate records from our d...read more

SQL Query to Exclude Null Values

Last Updated: 23 December 2024

In relational databases, managing NULL values is a critical aspect of data integrity and accuracy. A NULL value signifies the absence of dat...read more

SQL Query to Convert DateTime to Date in SQL Server

Last Updated: 15 May 2025

In SQL Server, working with DateTime data types can be a bit complex for beginners. This is because DateTime includes both the date and time ...read more

How to Select All Records from One Table That Do Not Exist in Another Table in SQL?

Last Updated: 11 December 2024

When working with SQL databases, a common requirement is to find records from one table that do not exist in another table. This can be achi...read more

SQL - SELECT from Multiple Tables with MS SQL Server

Last Updated: 14 June 2021

In SQL we can retrieve data from multiple tables also by using SELECT with multiple tables which actually results in CROSS JOIN of all the t...read more

SQL Query to Create a Backup Table

Last Updated: 11 March 2025

Relational databases play an important role in managing data, especially during complex operations like updates and deletions. To maintain d...read more

SQL Query to Find the Name of a Person Whose Name Starts with Specific Letter

Last Updated: 24 March 2023

Here, we are going to see how to find the name of a person whose name starts with a specified letter in SQL. In this article, we will be mak...read more

SQL

SQL-Query

SQL Query to Find the Highest Salary of Each Department

Last Updated: 03 December 2024

Structured Query Language (SQL) is a standard database language widely used for managing, maintaining, and retrieving data from relational d ...read more

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