Auto saved by Logseq

pages/总复习2023t1.md

@@ -1191,14 +1191,30 @@
 						- Transaction Transparency: Ensures that all distributed transactions maintain distributed database’s integrity and consistency.
 						- Performance Transparency: must perform as if it were a centralized DBMS.
 					- LATER advantages and disadvantages of distributed databases
+						- Advantages
+							- • Reflects organizational structure
+							  • Improved shareability and local autonomy
+							  • Improved availability
+							  • Improved reliability
+							  • Improved performance
+							  • Economics
+							  • Modular growth
+						- Disadbantages
+							- • Complexity
+							  • Cost
+							  • Security
+							  • Integrity control more difficult
+							  • Lack of standards
+							  • Lack of experience
+							  • Database design more complex
 				- DONE XML
-					- LATER XML definition and basic concepts #flashcard
+					- DONE XML definition and basic concepts #flashcard
 					  id:: 648974ba-afab-457e-9633-488450e9e16f
 						- eXtensible Markup Language
 						- A meta-language (i.e. a language for describing other languages) that
 						  enables designers to create their own customised tags to provide
 						  functionality not available with HTML.
-					- LATER Relational model versus XML #flashcard
+					- DONE Relational model versus XML #flashcard
 					  id:: 648974ba-d417-4eef-be28-46cd5894c5c7
 						- SQL
 							- is a special-purpose programming language