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The Basic 2PL:The basic two phase locking allows release of lock at any time after all the locks have been obtained. For instance, we can release the locks in schedule of Figure, after we have gone through the values of Y and Z in transaction 11, even before the display of the sum. This will increase the concurrency level. The basic 2PL is given graphically in Figure.
Components of database manager The above functions are reached by the database manager. The major elements of a database manager are: Authorisation control: This mod
Given the subsequent relations: vehicle (reg_no, make, colour) Person (eno, name, address) Owner (eno, reg_no) Write expressions
what is Lossless-join decomposition
Illustrate how you can use QBE to perform logical AND and OR operation
What Count function return in SQL? Count function within SQL returns the number of values. (Count function counts all the not null values in the exact column. If we need to cou
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
1. Use the Invoice table structure shown below to answer the following questions: a) Draw the dependency diagram and identify the primary key and all dependencies, including al
sql is relationally complete-justify
Describe DROP TABLE command of SQL along with both the options - CASCADE and RESTRICT. DROP TABLE command - This command drops the specified table. Dropping a table also dro
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