Database Interview Questions - Nutrition Foundation of India
... redundancy. Normalization usually involves dividing a database into two or more tables and defining relationships between the tables. The objective is to isolate data so that additions, deletions, and modifications of a field can be made in just one table and then propagated through the rest of the ...
... redundancy. Normalization usually involves dividing a database into two or more tables and defining relationships between the tables. The objective is to isolate data so that additions, deletions, and modifications of a field can be made in just one table and then propagated through the rest of the ...
unit 3: database manipulation - Newham Adult Learning Service
... Candidates are assessed by means of an OCR-set practical assignment with a notional duration of 2½ hours. The assignment is set in a realistic scenario and is designed to allow candidates to use their knowledge and understanding to demonstrate skill in each assessment objective in a logical and real ...
... Candidates are assessed by means of an OCR-set practical assignment with a notional duration of 2½ hours. The assignment is set in a realistic scenario and is designed to allow candidates to use their knowledge and understanding to demonstrate skill in each assessment objective in a logical and real ...
Conventional Files versus the Database Files versus Database Pros
... be designed to ensure that no field takes on an inappropriate value • Referential integrity – the assurance that a foreign key value in one table has a matching primary key value in the related table. ...
... be designed to ensure that no field takes on an inappropriate value • Referential integrity – the assurance that a foreign key value in one table has a matching primary key value in the related table. ...
Database Technologies - Boston College Personal Web Server
... TIME 12:01 PM 10:51 AM 9:03 AM 4:53 PM 3:15 PM 11:27 AM 2:02 PM 5:00 PM 5:30 PM 11:44 AM 12:38 AM 4:53 PM ...
... TIME 12:01 PM 10:51 AM 9:03 AM 4:53 PM 3:15 PM 11:27 AM 2:02 PM 5:00 PM 5:30 PM 11:44 AM 12:38 AM 4:53 PM ...
Relational Data Clustering
... • Two areas of interest in relational data clustering are: clustering heterogeneous data, and relation ...
... • Two areas of interest in relational data clustering are: clustering heterogeneous data, and relation ...
Design and Development of Land Resources Information System of
... achieve the changes of land use this paper sets up land resources information system based on MapObjects component in Visual Basic environment and remote sensing technology. The whole system framework is designed by Client/Server structure. The system is composed of basic information database, land ...
... achieve the changes of land use this paper sets up land resources information system based on MapObjects component in Visual Basic environment and remote sensing technology. The whole system framework is designed by Client/Server structure. The system is composed of basic information database, land ...
Introduction to Database Systems
... • IMB: 35% market with $2.5BN in sales • Oracle: 33% market with $2.3BN in sales • Microsoft: 19% market with $1.3BN in sales ...
... • IMB: 35% market with $2.5BN in sales • Oracle: 33% market with $2.3BN in sales • Microsoft: 19% market with $1.3BN in sales ...
1. EntityFramework - Code First
... public DbSet Categories { get; set; }
public DbSet Posts { get; set; }
public DbSet PostAnswers { get; set; }
public DbSet Tags { get; set; }
...
... public DbSet
Object Composition and Reuse in a Distributed Multimedia
... This paper proposes a distributed multimedia database. We use object-oriented methodology with the support of multimedia networking technologies in the design and implementation of our system. The database supports an easy to reuse mechanism. Objects in the two layered database hierarchy can be grou ...
... This paper proposes a distributed multimedia database. We use object-oriented methodology with the support of multimedia networking technologies in the design and implementation of our system. The database supports an easy to reuse mechanism. Objects in the two layered database hierarchy can be grou ...
JDBC
... Actually, this example will produce an SQL syntax error because ORDER is a reserved word in SQL. To fix, use this string instead: “SELECT * FROM [ORDER]” ...
... Actually, this example will produce an SQL syntax error because ORDER is a reserved word in SQL. To fix, use this string instead: “SELECT * FROM [ORDER]” ...
Comparative Study of ODBMS vs RDBMS
... Relational databases typically treat complex data types as BLOBs (binary large bjects). For many users, it is not feasible because BLOBs cannot be queried. In addition, database developers have impedance mismatch between the third generation language (3GL) and structured query language (SQL). The im ...
... Relational databases typically treat complex data types as BLOBs (binary large bjects). For many users, it is not feasible because BLOBs cannot be queried. In addition, database developers have impedance mismatch between the third generation language (3GL) and structured query language (SQL). The im ...
Why use regression analyses!!!!
... his business/ i.e. to show the KPIs, key figures or facts from the different perspectives that influence them (sales organization, product/ material or time). In other words, to deliver structured information that the end-user can easily navigate by using any possible combination of business terms t ...
... his business/ i.e. to show the KPIs, key figures or facts from the different perspectives that influence them (sales organization, product/ material or time). In other words, to deliver structured information that the end-user can easily navigate by using any possible combination of business terms t ...
Gancho_DB_TEG_workshop_Nov2011 - Indico
... (e.g. Apache’s logs) as this info is vital for understanding how the system is used and the sources of load. 5) Well defined targets => Chasing a moving target wastes time and at the end does not make anybody happy. There must be certain limits! 08-Nov-2011 ...
... (e.g. Apache’s logs) as this info is vital for understanding how the system is used and the sources of load. 5) Well defined targets => Chasing a moving target wastes time and at the end does not make anybody happy. There must be certain limits! 08-Nov-2011 ...
Chapter 2
... – Refers to immunity of conceptual schema to changes in the internal schema. – Internal schema changes (e.g. using different file organizations, storage structures/devices). – Should not require change to conceptual or external schemas. ...
... – Refers to immunity of conceptual schema to changes in the internal schema. – Internal schema changes (e.g. using different file organizations, storage structures/devices). – Should not require change to conceptual or external schemas. ...
1 Introduction 1.1 Databases vs. files 1.2 Basic concepts and
... Reads up to len bytes of data from this file into an array of bytes. This method blocks until at least one byte of input is available. Although RandomAccessFile not a subclass of InputStream, this method behaves in the exactly the same way as the InputStream.read(byte[], int, int) method of InputStr ...
... Reads up to len bytes of data from this file into an array of bytes. This method blocks until at least one byte of input is available. Although RandomAccessFile not a subclass of InputStream, this method behaves in the exactly the same way as the InputStream.read(byte[], int, int) method of InputStr ...
Introduction to Database Systems
... programs? Now think about several tera-bytes of data. You need a separate program for every query. Consistency: multiple users access the same data Recovery: is it on harddisk now? All these can be implemented directly upon OS. But then you are just designing your own DB and DBMS. ...
... programs? Now think about several tera-bytes of data. You need a separate program for every query. Consistency: multiple users access the same data Recovery: is it on harddisk now? All these can be implemented directly upon OS. But then you are just designing your own DB and DBMS. ...
SQL CREATE TABLE Statement
... Guidelines for writing SQL • SQL statements start with a command, and then include few or many modifiers/extensions for the command. • SQL statements are not case sensitive. • Can span more than one physical line; it is a free form language. • SQL keywords cannot be abbreviated or split across line ...
... Guidelines for writing SQL • SQL statements start with a command, and then include few or many modifiers/extensions for the command. • SQL statements are not case sensitive. • Can span more than one physical line; it is a free form language. • SQL keywords cannot be abbreviated or split across line ...
XML Databases for Bioinformatics
... Create a servlet (or CGI) that accesses data through URL parameter list: – Oracle account – Tablename – Unique identifier – Stylesheet – Depth – Query constraints on column ...
... Create a servlet (or CGI) that accesses data through URL parameter list: – Oracle account – Tablename – Unique identifier – Stylesheet – Depth – Query constraints on column ...
Data Mining and Data Warehouse
... – Data warehouse • Designed for decision support • Contain vast amounts of historical data • Data mart – A department subset of the data warehouse that focuses on selected subjects, and its scope is department-wide ...
... – Data warehouse • Designed for decision support • Contain vast amounts of historical data • Data mart – A department subset of the data warehouse that focuses on selected subjects, and its scope is department-wide ...
Requirements_and_UseCases
... NEW TEXT: In some cases what you want to map is not the original value in the database but the result of applying a function to the value. For example, the value may be temperature in Centigrade and you may want to convert to Fahrenheit. Or from Euros to Dollars. It is easy to think of other exampl ...
... NEW TEXT: In some cases what you want to map is not the original value in the database but the result of applying a function to the value. For example, the value may be temperature in Centigrade and you may want to convert to Fahrenheit. Or from Euros to Dollars. It is easy to think of other exampl ...
On Line Analytic Processing (OLAP)
... stores all possible D-values, whereas only a subset of these values are present in the fact table at any given moment (in the example of Figure 2, only “sold” items are present). It is important to note that the dimension tables are not necessarily in normal form of any kind. However, this is not se ...
... stores all possible D-values, whereas only a subset of these values are present in the fact table at any given moment (in the example of Figure 2, only “sold” items are present). It is important to note that the dimension tables are not necessarily in normal form of any kind. However, this is not se ...
Create All Those Tables and Call PROC SQL Once!
... When creating extracts for clinical trial reporting, it is often the case that more than one dataset is created at a time. There is a great deal of overhead involved in calling or exiting PROC SQL (or many other SAS procedures, for that matter). The following presents a methodology for creating mult ...
... When creating extracts for clinical trial reporting, it is often the case that more than one dataset is created at a time. There is a great deal of overhead involved in calling or exiting PROC SQL (or many other SAS procedures, for that matter). The following presents a methodology for creating mult ...
Client/Server DB & Oracle 10g
... Alternate to adding a surrogate column for primary key Unique key that is created by combining two or more columns Usually comprises fields that are primary keys in other tables ...
... Alternate to adding a surrogate column for primary key Unique key that is created by combining two or more columns Usually comprises fields that are primary keys in other tables ...