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Discuss the types of integrity constraints in which must be checked for the update operations - Insert and Delete. Give examples.
Insert operation can violet any of the subsequent four constraints:
1) Domain constraints could be violated if given attribute value does not appear within corresponding domain. 2) Key constraints could be violated if given attribute value does not appear within corresponding domain. 3) Entity integrity can be violated if the primary key of the latest tuple t is NULL. 4) Referential integrity can be violated if value of any foreign key in t refers to a tuple in which does not exist in referenced relation.
Delete operation can violate only referential integrity constraints, if the tuple being deleted is referenced through the foreign keys from other tuples within the database.
The traffic data mgmt. systems infrastructure plan describes the software, hardware, data network, and other elements that will support the TDMS. The infrastructure plan is based o
milestone assignment
explain cascading rollback
discuss the purpose of the concurrency control?
(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate ex
Databases and data warehouses both are databases and both contains number of rows and columns of tables containing data. Data warehouse is really different from databases because d
Project Description: We have an encrypted HSQL Database which we want to change into csv format. HSQL DB . We have java application (jar file) which reads that database but n
Determine the minimal set of functional dependencies for the following data. This table is part of the OHSU database of extracurricular activities and tracks the DMICE band's co
wh
What are the different approaches for database design? There are two basic approaches for database design which are as follows: Attribute driven: It compiles a list of att
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