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How to read the exhibits

Mahtab Alam
Ranch Hand

Joined: Mar 28, 2012
Posts: 249

I am preparing for 1z0-047 Oracle sql expert exam.
I am having a bit difficulty in reading exhibits .

what is that diamond symbol below the table structure means
what is that key symbol below the table structure means
and what after those symbols is it system generated names for the constraints or something else.


And how to interpret those arrow symbols from one table to another table.
and in some exhibits the arrow symbol is two directional.

and how to find out in case of foreign key constraint , that which tables column references which tables column.

Shukran...


Oracle Java Programmer , Oracle SQL Expert , Oracle Java Web Component Developer
 
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subject: How to read the exhibits