Exam 2
... can regenerate the original table. ______ It is desirable to have a lossy join decomposition. ______ Normalization should remove transitive functional dependencies. ______ In a CREATE TABLE command, each attribute must have a data type associated with it. ______ NOT NULL UNIQUE tags on an attribute ...
... can regenerate the original table. ______ It is desirable to have a lossy join decomposition. ______ Normalization should remove transitive functional dependencies. ______ In a CREATE TABLE command, each attribute must have a data type associated with it. ______ NOT NULL UNIQUE tags on an attribute ...
DavidShaoChapter3Fall2003CS157B
... Need for speed—universal answer back then was to write a compiler. Pre-compiled code eliminates time spent reparsing SQL and figuring out the best way to access the data. Used B-trees to support indexing. ...
... Need for speed—universal answer back then was to write a compiler. Pre-compiled code eliminates time spent reparsing SQL and figuring out the best way to access the data. Used B-trees to support indexing. ...
Q- Which of the following constraints enforces entity integrity?
... ► The conceptual level is a level of indication between the internal level and the external level. ...
... ► The conceptual level is a level of indication between the internal level and the external level. ...
mca5043 - SMU Assignments
... Relation between Data Warehousing and Data Mining The connection between data warehouse and data mining is indisputable. Popular business organizations use these technologies together. The current section describes the relation between data warehouse and data mining. Data mining is concerned with fi ...
... Relation between Data Warehousing and Data Mining The connection between data warehouse and data mining is indisputable. Popular business organizations use these technologies together. The current section describes the relation between data warehouse and data mining. Data mining is concerned with fi ...
docx Database normalization - APA
... Normalization takes five step, though here we will only look at the first three that is 1st, 2nd and 3rd. First normalization step involves removing of the repetitive groups. This means that you move the details from the parent table or the original table, to another table taking only what is import ...
... Normalization takes five step, though here we will only look at the first three that is 1st, 2nd and 3rd. First normalization step involves removing of the repetitive groups. This means that you move the details from the parent table or the original table, to another table taking only what is import ...
Microsoft Access - - Vanderbilt University
... systems over MS-Access? MS-Access can handle a large number of records, but is somewhat slow compared to some of the high-end platforms. Multiple users may use the database simultaneously, but MSAccess is known to become unstable with greater than 3-5 users. Security can also be a factor. There is a ...
... systems over MS-Access? MS-Access can handle a large number of records, but is somewhat slow compared to some of the high-end platforms. Multiple users may use the database simultaneously, but MSAccess is known to become unstable with greater than 3-5 users. Security can also be a factor. There is a ...
CRSP SuRvivoR-biaS-fRee uS mutual fund databaSe April 2011 quArterly updAte
... A blank field means either that data was not applicable to a fund or that data is not available. A field with a “?” in it is a flag to indicate further research is required. A field has a zero in it when 1) The fund did not exist; 2) No value could be found; or 3) A calculated value could n ...
... A blank field means either that data was not applicable to a fund or that data is not available. A field with a “?” in it is a flag to indicate further research is required. A field has a zero in it when 1) The fund did not exist; 2) No value could be found; or 3) A calculated value could n ...
handout
... Decide what facts (attributes) you need to know about each entity, e.g. an Employee’s date of birth, salary. Attributes are represented by fields in the tables Decide on the relationships between the entities in the database; i.e. what attributes do they have in common. Relationships are formed in t ...
... Decide what facts (attributes) you need to know about each entity, e.g. an Employee’s date of birth, salary. Attributes are represented by fields in the tables Decide on the relationships between the entities in the database; i.e. what attributes do they have in common. Relationships are formed in t ...
Goal of data integration
... obtain from the company.When a representative is on the phone with a customer, it´s important to see the entire set of services the customer is getting from FullServe (internet service, credit card or products purchased). Furthermore, it is useful to know that the customer is a big spender on its cr ...
... obtain from the company.When a representative is on the phone with a customer, it´s important to see the entire set of services the customer is getting from FullServe (internet service, credit card or products purchased). Furthermore, it is useful to know that the customer is a big spender on its cr ...
Chapter 05 Overview - University of Massachusetts Boston
... and reports. A database helps extract significance from these numbers. The database can contribute to organizational success in a number of other way including providing managers and decision makers with timely, accurate, and relevant information. Traditionally, data was maintained in separate files ...
... and reports. A database helps extract significance from these numbers. The database can contribute to organizational success in a number of other way including providing managers and decision makers with timely, accurate, and relevant information. Traditionally, data was maintained in separate files ...
Access-L1
... • A collection of information • eg, lists of names, address, phone no for contact • Each item of information in the list such as name, phone no is called a field. • The collection of field information for one person in the list is a record. • Field and record information is contained in a grid calle ...
... • A collection of information • eg, lists of names, address, phone no for contact • Each item of information in the list such as name, phone no is called a field. • The collection of field information for one person in the list is a record. • Field and record information is contained in a grid calle ...
Database Languages
... data and their relationship to other types of data. It is mainly used to create files, databases, data dictionary and tables within databases. It is also used to specify the structure of each table, set of associated values with each attribute, integrity constraints, security and authorization i ...
... data and their relationship to other types of data. It is mainly used to create files, databases, data dictionary and tables within databases. It is also used to specify the structure of each table, set of associated values with each attribute, integrity constraints, security and authorization i ...
Software Engineering Syllabus
... What if more than one user is concurrently updating the same data? A transaction is a collection of operations that performs a single logical function in a database application Transaction-management component ensures that the database remains in a consistent (correct) state despite system failures ...
... What if more than one user is concurrently updating the same data? A transaction is a collection of operations that performs a single logical function in a database application Transaction-management component ensures that the database remains in a consistent (correct) state despite system failures ...
MODUL 11 Designing Databases(2)
... – A restricted database updates or deletes a key only if there are no matching child records – A cascaded database will delete or update all child records when a parent record is deleted or changed ...
... – A restricted database updates or deletes a key only if there are no matching child records – A cascaded database will delete or update all child records when a parent record is deleted or changed ...
Lesson 2
... and then efficiently linking the data together through the relationships of key fields, is called normalization. Eliminates data duplication Decreases data entry errors and inconsistencies Reduces file size ...
... and then efficiently linking the data together through the relationships of key fields, is called normalization. Eliminates data duplication Decreases data entry errors and inconsistencies Reduces file size ...
Insert Title Here
... • relations (tables), tuples (rows); conceptual level: ER • relational operations: , , , , ..., ,,,,,..., , , |X| ...
... • relations (tables), tuples (rows); conceptual level: ER • relational operations: , , , , ..., ,,,,,..., , , |X| ...
Protection and a General Model
... Object Oriented Database • When database capabilities are integrated with object-oriented programming language capabilities, the result is an object-oriented database management system (ODBMS). • An ODBMS makes database objects appear as programming language objects in one or more object-oriented p ...
... Object Oriented Database • When database capabilities are integrated with object-oriented programming language capabilities, the result is an object-oriented database management system (ODBMS). • An ODBMS makes database objects appear as programming language objects in one or more object-oriented p ...
CRSP SuRvivoR-biaS-fRee uS mutual fund databaSe OctOber 2012 quarterly update
... The data are installed with a new InstallAnywhere wizard. To install the data insert the DVD and click on the appropriate setup icon. General notes: The table with the largest number of rows is the Daily Returns table, containing 77,632,941 rows. A blank field means either that data was not ap ...
... The data are installed with a new InstallAnywhere wizard. To install the data insert the DVD and click on the appropriate setup icon. General notes: The table with the largest number of rows is the Daily Returns table, containing 77,632,941 rows. A blank field means either that data was not ap ...
Elements of Database System
... ◦ The purpose of DD is to enforce standard definitions of the data resources of the organization. ◦ Definition includes a precise description of the meaning of a data item name and a precise description of how values of each data item are stored in the computer system. ...
... ◦ The purpose of DD is to enforce standard definitions of the data resources of the organization. ◦ Definition includes a precise description of the meaning of a data item name and a precise description of how values of each data item are stored in the computer system. ...
No Slide Title
... Definition A database management system (DBMS) is a general-purpose software system that facilitates the process of defining, constructing, and manipulating databases for various applications. ...
... Definition A database management system (DBMS) is a general-purpose software system that facilitates the process of defining, constructing, and manipulating databases for various applications. ...