Why functions are used in sql?
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What is user define exception and example
What is nvl function?
What is varchar used for?
what is oracle database ? : Sql dba
How do you identify a primary key?
How do you declare a variable in pl sql?
Question: Below is the table city gender name delhi male a delhi female b mumbai male c mumbai female d delhi male e I want the o/p as follows: male female delhi 2 1 mumbai 1 1 Please help me in writing the query that can yield the o/p mentioned above?
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
What is a schema? How is it useful in sql servers?
What is parallel hint?
Which normal form is best?
what is view? : Sql dba
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