SQL - Table Constraints
Given the following constraint name on a table
Orders: FK_Orders_Customers, what type of constraint is this?Given the following constraint name on a table Orders: FK_Orders_Customers, what type of constraint is this?
medium📝 query result Q13 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze the prefix in the constraint name
The prefixFK_stands for Foreign Key.Step 2: Confirm the constraint type
Since the name isFK_Orders_Customers, it indicates a foreign key from Orders to Customers table.Final Answer:
Foreign key constraint -> Option AQuick Check:
FK_ prefix = Foreign Key [OK]
Quick Trick: FK_ prefix means foreign key constraint [OK]
Common Mistakes:
MISTAKES- Confusing FK_ with primary key PK_
- Assuming FK_ means unique constraint
- Ignoring prefix meaning
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