What are unique indexes in SQL and how do they work?
An example of an AI chatbot conversation about unique indexes in SQL.
What are unique indexes in SQL and how do they work?
Unique indexes are a type of index that ensures all values in a column are distinct. They prevent duplicate entries.
Can you give me an example of how to create a unique index?
Sure! You can create a unique index using the following SQL command: CREATE UNIQUE INDEX index_name ON table_name(column_name);
What happens if I try to insert a duplicate value?
If you try to insert a duplicate value into a column with a unique index, SQL will throw an error and prevent the insertion.
Are there any performance benefits to using unique indexes?
Yes, unique indexes can improve query performance by allowing the database to quickly locate rows based on unique values.
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