What is orm in sql?

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what is variable in package specification

3 Answers  

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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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Is keyword pl sql?

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What is difference between pls_integer and integer?

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how can we find the number of rows in a table using mysql? : Sql dba

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What is referential integrity ?

3 Answers   BirlaSoft,

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Is drop table faster than truncate?

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Can i possible to see Table Details ? Ex : Table Name Date Time User Emp May/18/2010 12:59pm Scott

3 Answers  

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How can you create an empty table from an existing table?

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Is merge a dml statement?

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What is difference between hql and sql?

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