SQL Server Tutorials| Basics & Advance Concepts | Interview Question & Answer Series | SQL Server Tricks & Tips
The major difference between the UNION and UNION ALL operators in SQL is how they handle duplicate rows when the result set of multiple select… Read More »Difference between union and union all
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This is one of the most asked SQL interview Question that write a SQL Query to display Employees and Manager name of the employee. Let’s… Read More »Display employees and their manger name in SQL
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A series of SQL most asked interview questions and answers for freshers and experienced professionals will help you prepare and cracking SQL interview. Difference between… Read More »SQL Interview Questions
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An identity column in table generates key values automatically based on the current seed and increment, and the benefit of creating an identity column is… Read More »Reset Identity column value
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This article demonstrate how to replace multiple columns value at once in Power Query. Lets say, you need to check if column value is blank… Read More »Replace multiple columns values in Power Query
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The SQL NOT EXISTS Operator is used to check the existence of any record in a subquery. The NOT EXISTS operator returns true if the… Read More »SQL NOT EXISTS
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Write an SQL query to report the nthย highest salary from the Employee table. If there is no nthย highest salary, the query should report null. Table:… Read More »SQL Leet Code Nth Highest Salary Problem
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SQL Leet code problem: Rank Scores Write an SQL query to rank the scores. The ranking should be calculated according to the following rules: The… Read More »SQL Leet Code Rank Scores Problem
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This article demonstrates how to Convert multiple rows into a single comma separated row, it can be done by using in-built SQL functions. As you… Read More »How to get multiple rows data in single row in SQL
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Rolling average is a calculation to analyze data by creating series of average of different subsets of the entire data. For example, you have data… Read More »Rolling average in SQL
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To find the highest salary of employee in each department, first we will create a sample tables named EmployeeDetails and Department as shown below. CREATE… Read More »How to get top salary of each department
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There are multiple ways to get the size of table in SQL Server. Lets take a look on them one by one. Using sp_spaceused system… Read More »How to get the size of table in SQL
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Sometimes you need to insert same row multiple times in a table. There are many ways to do that but here we will see one… Read More »Insert same rows multiple times in table
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In this article you will see how to compare column names in two table. Assume that, you have two tables and you are asked to… Read More »How to compare column names in two tables in SQL
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You may have faced a situation where you are asked to find values in a column with leading or trailing spaces or remove the leading… Read More »How to find leading and trailing spaces in SQL Server ?
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Showing a last refresh date and time in Power BI report let you know how fresh your report data is as sometimes report viewer can… Read More »How to show last refresh date in Power BI
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How to search for string within xml column in SQL table? As you can see here we have a sample table having categories and products… Read More »Search string in xml
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Sometimes, you need to show range of numbers or may be asked to generate a range of numbers between two numbers in SQL Server. Well,… Read More »Generate a range of numbers between two numbers in SQL Server
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A lost update problem occurs in concurrent transactions, when two transactions try to read and update the same column on the same row within a… Read More »Lost update problem in concurrent transations
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SQL Return is a control-of-flow language keyword which is used to exit unconditionally from a query or stored procedure. It can be used at any… Read More »SQL Return
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