How to Create a Table with Multiple Foreign Keys and Not Get Confused
Understanding Table Relations SQL server adds foreign keys to implement relations between tables in...
SQL FOREIGN KEY CONSTRAINT: The Ultimate, Easy Guide for Newbies
Newbie? Then an SQL foreign key may be foreign to you. You may have heard different opinions about SQL foreign keys. If you haven’t, soon...
The Difference Between Primary Key And Unique Key
“What is the difference between a primary key constraint and a unique key constraint?” This is probably the most frequently-asked job...
SQL Server Bulk Insert – Part 2
In the previous part of this article, we discussed how to import CSV files to SQL Server with the...
Difference Between Inline and Out-of-Line Constraints
Constraints on tables and columns allow you to enforce the data quality. In SQL, there are two ways of creating constraints on a...
Counting references to a record in a table via Foreign Keys
I have recently needed to solve the task for my own purpose: to calculate the number of external records linked by a foreign key for each...
Insight into SQL Server Unique Constraints
What are unique key constraints? A unique constraint is a rule that restricts column entries to...
CHECK Constraints in SQL Server
In this article, we will talk about CHECK constraints. We will see how to add CHECK constraints to SQL Server table columns and discuss the...
