Рет қаралды 49,748
DBMS: Codd’s 12 Rules (13 Rules)
Topics discussed:
1. Codd's 12 Rules:
i. Rule 0 - The Foundation Rule
ii. Rule 1 - The Information Rule
iii. Rule 2 - The Guaranteed Access Rule
iv. Rule 3 - Systematic Treatment of Null Values
v. Rule 4 - Dynamic Online Catalog
vi. Rule 5 - The Comprehensive Data Sublanguage
vii. Rule 6 - The View Updating Rule
viii. Rule 7 - Possible for higher level Insert, Update and Delete
xi. Rule 8 - Physical Data Independence
x. Rule 9 - Logical Data Independence
xi. Rule 10 - Integrity Independence
xii. Rule 11 - Distribution Independence
xiii. Rule 12 - The Non-subversion Rule.
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