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.
Data Type Conversion
Using the CAST and CONVERT functions to convert data types in SQL Server. What are the differences between the two functions to convert data types in a T-SQL statement?
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.
NULL Values and Aggregate Functions
Explore how NULL values affect aggregate functions and learn how to handle them effectively in your SQL queries.
SQL COALESCE Function
The SQL Coalesce function is used when you want to combine values from a series of columns or expressions when they might contain NULL values.
Data Manipulation Language (DML)
What is the data manipulation language (DML)? How to write the INSERT, UPDATE, and DELETE statements in T-SQL.
Using the INSERT Statement
How to use an INSERT statement to add records to a table in SQL Server. We will begin with just a simple INSERT statement that will add one row into the table.
IDENTITY Columns
Learn how to use IDENTITY Columns to automatically number records in your database tables for efficient data management.
Delete vs Truncate vs Drop
What is the difference between the DELETE, TRUNCATE, and DROP statements in T-SQL?