September 2014 report
... (inconsistency and loss of data) generated by the three types of anomalies. Most candidates were able to provide an example of an update anomaly, but not so much for insert and delete anomalies. For example, a typical mistake is to assume that a new staff cannot be inserted if they do not have a roo ...
... (inconsistency and loss of data) generated by the three types of anomalies. Most candidates were able to provide an example of an update anomaly, but not so much for insert and delete anomalies. For example, a typical mistake is to assume that a new staff cannot be inserted if they do not have a roo ...
24Sp157AL2 - Department of Computer Science
... without changing the logical schema Applications depend on the logical schema In general, the interfaces between the various levels and components should be well defined so that changes in some parts do not seriously influence others. ...
... without changing the logical schema Applications depend on the logical schema In general, the interfaces between the various levels and components should be well defined so that changes in some parts do not seriously influence others. ...
11_dbimpl - University of Central Florida
... – Storing derived attributes is one of the most common means of improving processing efficiency – How many tables/row examinations are avoided by storing total grade points and total credit hours with the STUDENT entity? – What new operations must be introduced to keep the data current? – Explicitly ...
... – Storing derived attributes is one of the most common means of improving processing efficiency – How many tables/row examinations are avoided by storing total grade points and total credit hours with the STUDENT entity? – What new operations must be introduced to keep the data current? – Explicitly ...
H-Store: A High-Performance, Distributed Main Memory Transaction
... any) are passed back to the initiating site. H-Store uses a generic distributed transaction framework to ensure serializability. We are currently comparing protocols that are based on both optimistic and pessimistic concurrency control [5, 12]. The final results for a query are passed back to the bl ...
... any) are passed back to the initiating site. H-Store uses a generic distributed transaction framework to ensure serializability. We are currently comparing protocols that are based on both optimistic and pessimistic concurrency control [5, 12]. The final results for a query are passed back to the bl ...
12.2_InMemory_new_features
... The Expression Statistics Store (ESS) automatically tracks the results of frequently evaluated (“hot”) expressions Invoke the IME_CAPTURE_EXPRESSIONS procedure which is part of the DBMS_INMEMORY_ADMIN package Queries the ESS, and identifies the 20 most frequently accessed (“hottest”) expressio ...
... The Expression Statistics Store (ESS) automatically tracks the results of frequently evaluated (“hot”) expressions Invoke the IME_CAPTURE_EXPRESSIONS procedure which is part of the DBMS_INMEMORY_ADMIN package Queries the ESS, and identifies the 20 most frequently accessed (“hottest”) expressio ...
Relational Processing of Tape Databases
... The essence of relational processing is to use more than one file to store your information in an efficient, easily maintained way. Figure 1 shows how a name file and Zip Code file can be related to show which city each person lives in. The name of the city is not on the file with the person's name. ...
... The essence of relational processing is to use more than one file to store your information in an efficient, easily maintained way. Figure 1 shows how a name file and Zip Code file can be related to show which city each person lives in. The name of the city is not on the file with the person's name. ...
Topics in Database Administration
... • Consistency: The transaction moves a database from one state of consistency, through inconsistency to another state of consistency. • Isolation: A transaction executes in isolation from other transactions. – This is also referred to as the “serializability” of transactions. – A transaction can aff ...
... • Consistency: The transaction moves a database from one state of consistency, through inconsistency to another state of consistency. • Isolation: A transaction executes in isolation from other transactions. – This is also referred to as the “serializability” of transactions. – A transaction can aff ...
Chapter 9: Object-Relational Databases
... – Each tuple of the supertable people can correspond to at most one tuple of each of the tables students and teachers. – Each tuple in students and teachers must have exactly one corresponding tuple in people. • Inherited attributes other than the primary key of the supertable need not be stored, an ...
... – Each tuple of the supertable people can correspond to at most one tuple of each of the tables students and teachers. – Each tuple in students and teachers must have exactly one corresponding tuple in people. • Inherited attributes other than the primary key of the supertable need not be stored, an ...
Microsoft Access 2010
... Using Criteria in Calculating Statistics • There are some built-in statistics such as COUNT, SUM, MIN, MAX, STDEV, VAR, etc. • These are called aggregate functions – they perform mathematical functions against a group of records. • Do pages 119-122 ...
... Using Criteria in Calculating Statistics • There are some built-in statistics such as COUNT, SUM, MIN, MAX, STDEV, VAR, etc. • These are called aggregate functions – they perform mathematical functions against a group of records. • Do pages 119-122 ...
SQL Server 2000
... tempdb is re-created every time SQL Server is started so the system starts with a clean copy of the database. ...
... tempdb is re-created every time SQL Server is started so the system starts with a clean copy of the database. ...
Slide 1
... sp_changeobjectowner permissions has an additional requirement. In order for a member of the db_ddladmin role to be able to successfully call sp_changeobjectowner, the member must also be a member of the db_securityadmin database role. When an object’s owner is changed, permissions are changed as we ...
... sp_changeobjectowner permissions has an additional requirement. In order for a member of the db_ddladmin role to be able to successfully call sp_changeobjectowner, the member must also be a member of the db_securityadmin database role. When an object’s owner is changed, permissions are changed as we ...
Understanding Software Application Interfaces via String
... independent remote software applications cooperate and communicate with one another via some standardized protocol in the form of XML string data. There is also a rapid increase in the digitization of information being accompanied by exponential increases in networking, storage, and computing capaci ...
... independent remote software applications cooperate and communicate with one another via some standardized protocol in the form of XML string data. There is also a rapid increase in the digitization of information being accompanied by exponential increases in networking, storage, and computing capaci ...
![[Powerpoints] - Multi-Tenant Database Model with SQL Azure.zip](http://s1.studyres.com/store/data/004346108_1-0f22fb5ecda37af8ef934e6f2dafb5b3-300x300.png)
[Powerpoints] - Multi-Tenant Database Model with SQL Azure.zip
... • The SQL Azure database fabric is flexible and scales according to business needs. • The service is supported by multiple servers. • Therefore, it has the ability to provide any required storage capacity. • Also, there is no time delay due to server provisioning. ...
... • The SQL Azure database fabric is flexible and scales according to business needs. • The service is supported by multiple servers. • Therefore, it has the ability to provide any required storage capacity. • Also, there is no time delay due to server provisioning. ...
Unity_lawrence
... format in a database. Schema integration - is the process of combining local schemas into a global, integrated view by resolving conflicts present between the schemas. Data integration - is the process of combining data at the entity-level. It requires resolving representational ...
... format in a database. Schema integration - is the process of combining local schemas into a global, integrated view by resolving conflicts present between the schemas. Data integration - is the process of combining data at the entity-level. It requires resolving representational ...
Object-Oriented Databases Need for Complex Data Types
... é A set of variables that contain the data for the object. The value of each variable is itself an object.! é A set of messages to which the object responds; each message may have zero, one, or more parameters.! é A set of methods, each of which is a body of code to implement a message; a meth ...
... é A set of variables that contain the data for the object. The value of each variable is itself an object.! é A set of messages to which the object responds; each message may have zero, one, or more parameters.! é A set of methods, each of which is a body of code to implement a message; a meth ...
Architecting the data layer for analytic applications in today’s data-intensive, high-
... access to operational data, historical data and data collected from extended enterprises and multiple channels in just about real-time. It is incumbent on IT to provide faster access and better visualization tools to empower business users to effectively analyze and discover or mine this data. Busin ...
... access to operational data, historical data and data collected from extended enterprises and multiple channels in just about real-time. It is incumbent on IT to provide faster access and better visualization tools to empower business users to effectively analyze and discover or mine this data. Busin ...
Chapter 1: Introduction - Universiteit van Amsterdam FNWI
... from depositor, account where depositor.customer_id = ‘192-83-7465’ and depositor.account_number = account.account_number ...
... from depositor, account where depositor.customer_id = ‘192-83-7465’ and depositor.account_number = account.account_number ...
ppt
... from depositor, account where depositor.customer_id = ‘192-83-7465’ and depositor.account_number = account.account_number ...
... from depositor, account where depositor.customer_id = ‘192-83-7465’ and depositor.account_number = account.account_number ...
Data Aware Components - Java Notes
... A new package will be created called META-INF which stores the information about the project. The persistence unit file is created to store the details of the connection between the database and the project. Note that a TblStudents class has been created for you when we bound the table jTblStudents ...
... A new package will be created called META-INF which stores the information about the project. The persistence unit file is created to store the details of the connection between the database and the project. Note that a TblStudents class has been created for you when we bound the table jTblStudents ...
Designing and executing scientific workflows with a programmable integrator
... domain offer the possibility of downloading information in XML format. Furthermore, many programs in the field also provide input/output XML-based mechanisms. In the case in which the data are not provided in XML format, a wrapper mechanism should be implemented to provide the necessary translation ...
... domain offer the possibility of downloading information in XML format. Furthermore, many programs in the field also provide input/output XML-based mechanisms. In the case in which the data are not provided in XML format, a wrapper mechanism should be implemented to provide the necessary translation ...
Demeter in the Database
... lurking underneath all of that), all you need to know is that a path exists from the BigMac to its pickle seeds. You don't have to know what that path is or exactly how to traverse it, and you don't have to encode that path in your methods. That way when the burger later changes such that the pickle ...
... lurking underneath all of that), all you need to know is that a path exists from the BigMac to its pickle seeds. You don't have to know what that path is or exactly how to traverse it, and you don't have to encode that path in your methods. That way when the burger later changes such that the pickle ...
Java Database Connectivity (JDBC)
... The PreparedStatement interface inherits from Statement and differs from it in two ways: Instances of PreparedStatement contain an SQL statement that has already been compiled. This is what makes a statement "prepared." The SQL statement contained in a PreparedStatement object may have one or more I ...
... The PreparedStatement interface inherits from Statement and differs from it in two ways: Instances of PreparedStatement contain an SQL statement that has already been compiled. This is what makes a statement "prepared." The SQL statement contained in a PreparedStatement object may have one or more I ...
PL/SQL
... • Two variables can have the same name, provided they are in different blocks • The variable name (identifier) should not be the same as the name of table columns used in the block • The names of the variables must not be longer than 30 characters. The first character must be a letter; the remaining ...
... • Two variables can have the same name, provided they are in different blocks • The variable name (identifier) should not be the same as the name of table columns used in the block • The names of the variables must not be longer than 30 characters. The first character must be a letter; the remaining ...
Operational Scenarios Using the Microsoft Data
... Data is central to what we do. Even though we now call our profession “information technology” rather than “data processing”, data is no less important. In fact, the volume, variety, and velocity of data that we work with increase every day. To deal with this, organizations use a range of data techn ...
... Data is central to what we do. Even though we now call our profession “information technology” rather than “data processing”, data is no less important. In fact, the volume, variety, and velocity of data that we work with increase every day. To deal with this, organizations use a range of data techn ...