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Differentiate between a Global and a Local temporary table?
- A local temporary table exists only for the duration of a connection or if defined inside a compound statement, for the duration of compound statement.
- Global temporary tables (created with a double "##") are visible to all sessions.
- Global temporary tables are dropped when the session which created it ends and all other sessions have stopped referencing it.
Distributed Database Management System
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Which element in the database can modified by changing the data dictionary? Data elements in the database can be changed or modified through changing the data dictionary.
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What is the difference between WHERE and HAVING clauses?. Predicates in the WHERE clause applies to every tuple while the predicate in the HAVING clause applies to groups.
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