What are the types of tables in Teradata
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Answer Posted / rajesh kumar
update on previous answer:
1.Derived table stores the derived result from a subquery.
2.It uses only spool space, so no table definition,
permission needed.
simple query eg:
select * from (select max(sal) from emp) DT (Max_sal)
answer:
derived table(DT) has Max salary and result would be
Max_sal- here subquery result is maintained in derived table
-------
25000
3. derived table auto drops after the query ends
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