How can I use EXPLAIN for query optimization?
An example of an AI chatbot conversation about using EXPLAIN for optimizing SQL queries.
What is the EXPLAIN command in SQL?
The EXPLAIN command provides information about how SQL queries are executed, helping to analyze performance.
How can I use EXPLAIN to optimize my queries?
You can use EXPLAIN to see the execution plan of your query, which shows how tables are joined and which indexes are used.
What should I look for in the EXPLAIN output?
Look for the type of join, the number of rows examined, and whether indexes are being utilized effectively.
Can you give me an example of a query and its EXPLAIN output?
Sure! For a query like 'SELECT * FROM users WHERE age > 30', EXPLAIN might show a full table scan if no index exists.
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