What is the location of pre_defined_functions.
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How do you rename a table in sql?
SELECT category, type, AVG(price) FROM products GROUP BY category, type ORDER BY 1, 2 If there are three distinct categories in the "products" table, and each one has five different types, how many rows are returned by the query above? 1. 1 row 2. 3 rows 3. 5 rows 4. 8 rows 5. 15 rows
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Explain the usage of WHERE CURRENT OF clause in cursors ?
What are the types of variable use in pl sql?
How do you optimize SQL queries ?
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What are sql indexes?
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