Category: Database

Suppose I have two tables: state_list and country_list. In the state_list table, we have three columns: stateID, statename, and countryID. On the other side, I have two columns in the country_list table: countryID and countryname. To check if the countryID column in the state_list table is a foreign key referencing the countryID primary key column…

Indexes and foreign keys serve different purposes in a relational database, although they are both mechanisms used to improve database performance and enforce data integrity. Here’s a brief explanation of each: In summary, indexes are used to optimize data retrieval operations, while foreign keys are used to enforce relationships between tables and maintain data integrity.…

Requirement: I have two tables: country_list and state_list. The country_list table has a countryID field set as INT Primary Key, and the state_list table also has a countryID field. I want to set a foreign key (countryID) that references the country_list table’s countryID. How can I do this? To set up a foreign key relationship…