Selecting From Multiple Tables
How to write T-SQL SELECT statements using multiple tables and what are the differences between using Inner Joins, Left Outer Joins, Right Outer Joins, and Full Outer Joins.
Working with Schemas
What is the schema object in SQL Server? How is the schema object used for organization, naming, and security?
Character Data Types
Working with Character Data Types. In this post, we discuss the different character data types like char, nchar, varchar, and nvarchar that are available in SQL Server.
Integer Data Types
Working with Integer Data Types. In this post, we discuss the different number or integer data types available in SQL Server.
Date and Time Data Types
Working with Date and Time Data Types. In this post, we discuss using both the Data and Time data types in SQL Server.
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
How to work with NULL values in Aggregate Functions in a T-SQL statement. How to fix issues with NULL values with the AVG() and COUNT() functions.