HackerRank isn’t just a random collection of problems; they’ve organized their SQL section pretty well. You can find ...

They store data in clearly defined tables and simulate ... one user may belong to multiple communities, a product may be ...

Abstract: Efficient SQL Query Optimization (QO) is a fundamental aspect of database management systems, aimed at enhancing query performance and reducing resource consumption typically involves ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

A few months ago a new option was added to the Sql.Database and Sql.Databases functions in Power Query in Power BI and Excel which allows Power Query queries that combine data from different SQL ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

CREATE TABLE [Orders](Id INT PRIMARY KEY IDENTITY(1,1),Quantity INT,ProductID INT,CustomerID INT) CREATE TABLE Products(Id INT PRIMARY KEY ,Name VARCHAR (50) NOT NULL,Price FLOAT,) CREATE TABLE ...

There is an exclusive group called the Ninety-Two Club, whose members have watched a competitive first-team match at every Premier League and EFL ground. Richard Sutcliffe has wanted to join for 40 ...

I Have 2 tables WIthdrawMaterial and DepositMaterial,Both In WithdrawMaterial contain quantity column, and DepositMaterial contain totalDeposit ,I want to perform subtraction between quantity and ...