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Subqueries and Common Table Expressions (CTEs) are two powerful features in SQL that allow you to organize complex queries and make them more readable and maintainable. They help you write queries that can extract data dynamically, with results used in the main query. Both can be used to improve query performance and structure. 2. What […]
In SQL, a join is used to combine records from two or more tables based on a related column between them. Joins allow you to retrieve data from multiple tables efficiently and can simplify your queries significantly. There are different types of joins, each of which retrieves data in a specific way. 2. Inner Join […]
SELECT Statement (Retrieving Data) The SELECT statement is used to retrieve data from a table. Example: Retrieve all columns from the Customers table. Retrieve specific columns: WHERE Clause (Filtering Data) The WHERE clause filters data based on specific conditions. Example: Retrieve customers from New York. Retrieve customers whose names start with ‘J’: ORDER BY (Sorting […]
T-SQL (Transact-SQL) is Microsoft’s extension of SQL (Structured Query Language) used in SQL Server for managing and manipulating relational databases. It includes procedural programming constructs such as variables, loops, error handling, and functions that extend standard SQL capabilities. Key Features of T-SQL: Difference between SQL and T-SQL Feature SQL (Standard SQL) T-SQL (Transact-SQL) Language Scope […]
Here is a plan and tutorial to lean TSQL 1. Introduction to T-SQL 2. Basic T-SQL Commands 3. Working with Joins 4. Subqueries and Common Table Expressions (CTEs) 5. Data Modification Statements 6. Working with Indexes 7. Stored Procedures and Functions 8. Transactions and Error Handling 9. Triggers 10. Performance Optimization 11. Advanced Topics 12. […]
15 ways to make your first million dollars, ranging from pursuing high-paying professions like sales and law to more unconventional paths like creating viral content on YouTube, starting a subscription service, or flipping goods for profit. It also highlights the power of investing in index funds, licensing patents, and leveraging emerging industries like blockchain and […]
Six key reasons why many Indian families fail to create wealth. He highlights common mistakes such as over-investing in real estate, buying the wrong cars, and not allocating enough funds into equities. He also emphasizes the importance of proper health insurance, warns against pursuing early retirement, and critiques emotional spending habits that hinder financial growth. […]
