Opportunities for Query Optimization
Optimize your SQL Server queries for maximum performance. Learn how to troubleshoot query plans and identify optimization opportunities.
Writing SQL
Writing T-SQL Videos
In late 2018, I recorded a series of videos for APRESS publishing on how to write T-SQL Queries. (I have linked to the O’Reilly website below.) There are four titles in the series with each title about 45 minutes in length. The first is how to write a T-SQL SELECT…
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.
Columns and Records
In this post, we discuss what columns and records are in a SQL table including an explanation of objects and entities.
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.
Creating Table Relationships
This demonstration will walk through how to create table relationships and foreign key constraints using SQL.