How to test null values?
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how to join query for one source type is oracle another source type is sql server ?
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8. Display the client name and order date for all orders using the natural join keywords.
How to create index-by table in oracle?
9)When information has to be stored w.r.t employees and their respective departments, which of the following is the Correct formulation of entries? A)Employee and department would together be represented as an entity. B)This is too less information to decide on entities. C)An employee would be one entity and a department would be another. D)Such a scenario cannot be modelled in RDBMS
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Explain the concept of the DUAL table.