What is inner join in sql?

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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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What do you mean by stored procedures?

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What is parameter substitution in sql?

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how to get a list of indexes of an existing table? : Sql dba

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what is the difference between granting and creating a view?

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what is the difference between truncate and drop statements? : Sql dba

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What is exit statement?

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in materialized view the structure will create immediately or not?

2 Answers   iFlex,

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Can we change the table name in sql?

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What is difference between my sql and sql?

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what are the differences between char and varchar? : Sql dba

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