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What is trigger
Triggers are statements that are implemented automatically by the system as the side effect of a change to the database.
How to create a biological database based on viruses. How to decide which attribute should be there in the table and schema? How to identify the primary keys, foreign keys, domain,
Define physical and logical data independence. How does this architecture help in achieving these? Data independence entails that change in one view must not need a change in t
With the help of an example display how records can be deleted and updated in QBE. (i) Increase Pay_Rate of employees along with the skill of ‘cook' by 10%. (ii) Delete employee
What is property - properties of a database ? It is an integrated collection of logically related records. It consolidates separate files into a common pool of data records and
Table Handling In RDBMS more than one table can be tackled at a time by using join operation. Join operation is a relational operation that causes 2 tables with a common domai
A field-groups statement or an insert statement reverses storage space and transfers values. False.
I need some help with my normalization database homework.
Explain the difference between optimistic locking and pessimistic locking. Optimistic locking supposes no transaction conflict will occur and deals with the consequences if it
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
explain exhaustively the problems associated with ER diagrams. include illustrations in your answer
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