How to create your own reports in sql developer?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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How to get unique records from a table?

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What are the triggers associated with image items?

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How can one get sql*loader to commit only at the end of the load file? : aql loader

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What SQL keyword must immediately follow the UNION ALL statement? 1. SELECT 2. INTO 3. ORDER 4. WHERE 5. JOIN

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what is difference between stored procedures and application procedures,stored function and application function?

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What is the best strategy to use COMMIT in a pl/sql loop?

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What is the difference between syntax error and runtime error?

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Is mariadb nosql?

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What does select top 1 do in sql?

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How can I delete duplicate rows?

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