A check constraint in a database is a rule that ensures that data meets a specific condition by restricting what data can be stored in a column. An example could be when creating a table in SQL ...

ALTER TABLE artist_credit_name ADD CONSTRAINT artist_credit_name_artist_credit FOREIGN KEY (artist_credit) REFERENCES artist_credit (id); ALTER TABLE artist_credit ...

SQL DEFAULT Constraint syntax:- Below query will create a default constraint on city field:- CREATE TABLE Employee ( employee-Id int NOT NULL, Name varchar(255) NOT NULL, Address varchar(255), City ...

In this article, we will explain the basics of triggers and constraints, their similarities and differences, and some examples of how to create and apply them in SQL. A trigger is a special type ...

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I'm designing a database for cataloging games as shown in the picture below.<BR><BR>I have added on delete actions for the foreign key relationships between company and publisher/developers so if ...

SQL Server allows you to define cascading referential integrity constraints ... ID('SalesHistory') > 0 DROP TABLE SalesHistory GO CREATE TABLE SalesHistory SaleID int IDENTITY(1,1) NOT NULL ...