How do you declare a user-defined exception?
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What is the main difference between sql and pl/sql?
What is secondary key?
what are the different functions in sorting an array? : Sql dba
How do I add a primary key to a table?
SELECT flavor, SUM (ice_cream_sales) FROM sales_detail GROUP BY flavor ORDER BY 2 DESC If the "sales_detail" table contains ten records with different values in the flavor column (two "vanilla," three "chocolate," four "strawberry," and one NULL), how many rows are returned by the sample code above? 1. 0 rows 2. 1 row 3. 3 rows 4. 4 rows 5. 10 rows
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