SQL Server Foreign Key Default Behavior | DELETE & UPDATE Explained
In this video, we explore the default behavior of FOREIGN KEY constraints in SQL Server when you try to DELETE or UPDATE parent or child table data.
You’ll understand why SQL Server throws errors and how referential integrity is protected by default.
👉 What you will learn
What is a FOREIGN KEY in SQL Server
Default behavior of foreign keys (NO ACTION)
What happens when you try to DELETE parent data
What happens when you try to UPDATE primary key values
Common SQL Server foreign key errors explained
Why SQL Server blocks delete & update operations
Real-world database examples
The UPDATE statement conflicted with the FOREIGN KEY constraint "FK_NAME". The conflict occurred in database "DatabaseName", table "TableName", column 'ColumnName'.
The DELETE statement conflicted with the FOREIGN KEY constraint "FK_NAME". The conflict occurred in database "DatabaseName", table "TableName", column 'ColumnName'.
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