Filtering Records by Dates and Times
How to use the WHERE statement to filter records when the value is either a Date or a Time in a T-SQL statement.
T-SQL
Filtering Records by NULL Values
How to use the WHERE statement to filter records when a value IS NULL or IS NOT NULL in a T-SQL statement.
Sort Records using ORDER BY
How to use the ORDER BY statement to sort records in a T-SQL statement in both ascending and descending order.
Using GROUP BY and HAVING
In this post, we discuss how to use the GROUP BY and HAVING clause in a T-SQL statement and how to use them with aggregate functions.
Table Constraints
Restricting data by using Table Constraints in SQL Server. What are the different table constraints in SQL Server?
Tables and Relationships
Understanding the difference between Parent Tables and Child Tables and the difference between Primary Keys vs Foreign Keys.
Working with Time Precision
Working with Time Precision. How to efficiently support time precision in SQL Server. Data types are important to understand as they can save space on your hard drive, memory, and network.
What is a Function?
What is a SQL Function and how to use a function in a T-SQL statement? We use the GetDate() and LEFT() functions as examples.
Using Aggregate Functions
How to use the COUNT, MAX, AVG, and SUM Aggregate Functions in a T-SQL statement.
DML Triggers
Working with Triggers in SQL Server. How to use triggers for data manipulation statements (DML) like INSERT, UPDATE, and DELETE.