What are some examples of SQL indexes?
An example of an AI chatbot conversation about SQL indexes and their usage.
What are some examples of SQL indexes?
SQL indexes are used to speed up the retrieval of rows from a database table. For example, a B-tree index can be created on a column to improve search performance.
Can you give me a specific example of creating an index in SQL?
Sure! You can create an index on a table called 'employees' for the 'last_name' column using the following SQL command: CREATE INDEX idx_lastname ON employees(last_name);
What types of indexes are there in SQL?
There are several types of indexes in SQL, including B-tree indexes, hash indexes, unique indexes, and full-text indexes.
When should I use an index?
You should use an index when you have large tables and need to speed up query performance, especially for columns frequently used in WHERE clauses or JOIN conditions.
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