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.
Writing SQL
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.
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.
Working with Batches
Working with Batches in SQL Server, What are the differences between batches and transactions?
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
How to use IDENTITY columns in a table. An IDENTITY field is very similar to an auto-number field, where the number will automatically be added as each record is inserted.