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Explain cursors in SQL?
Cursors in SQL - An object used to store the output of a query for row-through-row processing through the application programs. Cursors are constructs which enable the user to name a private memory field to hold an exact statement for access at a later time.
Cursors are used to procedure multi-row result sets one row at a time. In addition, cursors remain track of which row is currently being accessed, that permit for interactive processing of the active set.
Explain weak and strong entity type ? Weak and Strong entity type: An entity set which does not have a primary key is referred to as a weak entity set. The existence of a wea
What is the difference between link and reference? The fundamental difference between links and references is that links are symmetrical on the other hand references refer only
Where does view definition stored? A view definition is permanently stored as part of the database.
After the completion of the logical model the physical model is to be made. The oracle 10 G will be used as a database server and all the tables with their column are created and i
limitations and benefits in database tecknowlagy
Horizontal Fragmentation- Horizontal fragmentation groups together the tuples in a relation that are collectively used by the main transactions. A horizontal fragment is produced b
It is mandatory that for every table in the LDB hierarchy there should exist one GET statement in the report. False. It is not essential.
Give the reasons for allowing concurrency? The reasons for allowing concurrency is if the transactions run serially, a short transaction might have to wait for a preceding long
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
non numeric literals
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