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Define Partial Key and Primary Key
A partial key, also known as discriminator, is the set of attributes which can uniquely identify weak entities that are related to similar owner entity. Primary key is a unique key but not comprise null values. An entity set can comprise at most one primary key.
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
sql is relationally complete-justify
What is database utility? Database utility is the interface among the ABAP/4 Dictionary and the underlying the SAP system.
What are the advantages of creating a table from existing table?
What is object identity? An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
Equi Join: A join in which the joining condition is based on equality among values in the common columns. Common columns show (redundantly) in the result table. Let us Consider th
ADVANCE OBJECT DESIGN Introduction Analysis is the initial step of the OMT methodology. It is apprehensive with devising a precise, concise, correct and understandable mo
Need a sample of a clinic database relationships
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