Writing a SELECT statement
What are the basics in writing a T-SQL SELECT? How to return columns and records from a table in SQL Server.
Deardurff
Columns and Records
In this post, we discuss what columns and records are in a SQL table including an explanation of objects and entities.
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.
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.
Filtering Records by Numbers
How to use the WHERE statement to filter records when the value is a number or integer data type in a T-SQL statement.
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.
Filtering Records by Character Data
How to use the WHERE statement to filter records when the value is a character data type 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.
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.