How many subqueries can be nested in a statement?

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Is it mandatory for the primary key to be given a value when a new record is inserted?

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Name Salary Abc 50000 Abc 50000 xyz 20000 find the max salary using aggregate function?

2 Answers   CTS,

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Is a foreign key always unique?

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What is the primary key?

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What are the features of pl sql?

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what are enums used for in mysql? : Sql dba

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What is thread join () in threading?

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how i do the database testing of online money transactions between two parties (client and organization). suppose our company makes a website for our client and give a extra feature of online money transaction with there clients then how i test this feature in database testing

1 Answers  

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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

3 Answers  

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Can a commit statement be executed as part of a trigger?

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How exception is different from error?

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