How can I prepare for SQL job interviews?
An example of an AI chatbot conversation about SQL job interview preparation.
What are the common SQL interview questions I should prepare for?
Common SQL interview questions include: 1. What is normalization? 2. Explain JOIN types. 3. How do you optimize a query?
Can you explain the difference between INNER JOIN and LEFT JOIN?
Sure! INNER JOIN returns records with matching values in both tables, while LEFT JOIN returns all records from the left table and matched records from the right table.
What are some tips for writing efficient SQL queries?
To write efficient SQL queries, use proper indexing, avoid SELECT *, limit the number of joins, and filter data as early as possible.
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