a) entities in ERD should correspond to an existing entity/store in DFD
b) entity in DFD is converted to attributes of an entity in ERD
c) relations in ERD has 1 to 1 correspondence to processes in DFD
d) relationships in ERD has 1 to 1 correspondence to flows in DFD
(a) entities in ERD should correspond to an existing entity/store in DFD
Explain CONNECT BY PRIOR?
What is ON DELETE CASCADE?
For which trigger timing can you reference the NEW and OLD qualifiers?
What is difference between TRUNCATE & DELETE?
If unique key constraint on DATE column is created, will it validate the rows that are inserted with SYSDATE?
When invoking this procedure, you encounter the error?
Explain UNION, MINUS, UNION ALL and INTERSECT?
How to access the current value and next value from a sequence? Is it possible to access the current value in a session before accessing next value?
What are the pre-requisites to modify datatype of a column and to add a column with NOT NULL constraint?
Read the following code
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