Chapter 7: Relational Database Design
... entire customer relation. Instead, the index is used to look up tuples in customer for which the customer-name value is d[customer-name]. Only one tuples in customer table for which d[c-name] = c[c-name] since c-name is a primary key for ...
... entire customer relation. Instead, the index is used to look up tuples in customer for which the customer-name value is d[customer-name]. Only one tuples in customer table for which d[c-name] = c[c-name] since c-name is a primary key for ...
Database Programming - Section 12
... For the practice exercises in this lesson, HTML DB allows the creation of sequences and the use of a pseudocolumn called NEXTVAL to retrieve the next value in a generated sequence. However, the pseudocolumn called CURRVAL is not accessible in the HTML DB environment. Once you retrieve the NEXTVAL fr ...
... For the practice exercises in this lesson, HTML DB allows the creation of sequences and the use of a pseudocolumn called NEXTVAL to retrieve the next value in a generated sequence. However, the pseudocolumn called CURRVAL is not accessible in the HTML DB environment. Once you retrieve the NEXTVAL fr ...
Concepts of Database Management Sixth Edition
... To create a computed field in Access, enter expression in the desired column of design grid To use functions to perform calculations in Access, include the appropriate function in the Total row To sort query results in Access, select Ascending or Descending in Sort row for the field or fields ...
... To create a computed field in Access, enter expression in the desired column of design grid To use functions to perform calculations in Access, include the appropriate function in the Total row To sort query results in Access, select Ascending or Descending in Sort row for the field or fields ...
Fast Track 3.0 Reference Guide
... In order to overcome the limitations of traditional data warehouse systems, organizations have resorted to using traditional RDBMS optimization techniques such as building indexes, preaggregating data, and limiting access to lower levels of data. The maintenance overheads associated with these appro ...
... In order to overcome the limitations of traditional data warehouse systems, organizations have resorted to using traditional RDBMS optimization techniques such as building indexes, preaggregating data, and limiting access to lower levels of data. The maintenance overheads associated with these appro ...
QARun Installation and Configuration Guide
... TestPartner: Tests Web- and Windows-based applications that use Microsoft technologies. You can record user sessions with the application, add validation functions, and replay the sessions later to ensure that the application works as expected. TestPartner’s scripting language is Visual Basic for Ap ...
... TestPartner: Tests Web- and Windows-based applications that use Microsoft technologies. You can record user sessions with the application, add validation functions, and replay the sessions later to ensure that the application works as expected. TestPartner’s scripting language is Visual Basic for Ap ...
Physical Database Design(1)
... Clustered vs. unclustered: If order of data records is the same as, or `close to’, order of data entries, then called clustered index. Alternative 1 implies clustered, but not vice-versa. A file can be clustered on at most one search key. Cost of retrieving data records through index varies gr ...
... Clustered vs. unclustered: If order of data records is the same as, or `close to’, order of data entries, then called clustered index. Alternative 1 implies clustered, but not vice-versa. A file can be clustered on at most one search key. Cost of retrieving data records through index varies gr ...
original
... chained together in a linked list. Above scheme is called closed hashing. An alternative, called open hashing, which does not use overflow buckets, is not suitable for database applications. ...
... chained together in a linked list. Above scheme is called closed hashing. An alternative, called open hashing, which does not use overflow buckets, is not suitable for database applications. ...
Dynamic load balancing in parallel database systems
... which guarantees that read-only queries do not suffer from or cause any lock conflicts [CM86, BC92]. Increased resource contention, on the other hand, is unavoidable since complex queries pose high CPU, memory and disk bandwidth requirements which can result in significant delays for concurrently ex ...
... which guarantees that read-only queries do not suffer from or cause any lock conflicts [CM86, BC92]. Increased resource contention, on the other hand, is unavoidable since complex queries pose high CPU, memory and disk bandwidth requirements which can result in significant delays for concurrently ex ...
Distributed Databases - University of Waterloo
... More work needs to be done (in progress) Update extraction from the master • Trigger based = attach triggers to tables to report updates (low overhead at slaves, high overhead at master) • Generic = propagate update SQL statements to copies (high overhead at slaves, no overhead at master, limitati ...
... More work needs to be done (in progress) Update extraction from the master • Trigger based = attach triggers to tables to report updates (low overhead at slaves, high overhead at master) • Generic = propagate update SQL statements to copies (high overhead at slaves, no overhead at master, limitati ...
Query - NCNU Moodle 課程
... • To indicate AND criteria in an Access query, place both criteria in the same Criteria row of the design grid; to indicate OR criteria, place criteria on separate Criteria rows of the design grid • To create a computed field in Access, enter expression in the desired column of design grid • To use ...
... • To indicate AND criteria in an Access query, place both criteria in the same Criteria row of the design grid; to indicate OR criteria, place criteria on separate Criteria rows of the design grid • To create a computed field in Access, enter expression in the desired column of design grid • To use ...
Database Theory - Binus Repository
... • Internal schema at the internal level to describe data storage structures and access paths. Typically uses a physical data model. • Conceptual schema at the conceptual level to describe the structure and constraints for the whole database. Uses a conceptual or an implementation data model . • Exte ...
... • Internal schema at the internal level to describe data storage structures and access paths. Typically uses a physical data model. • Conceptual schema at the conceptual level to describe the structure and constraints for the whole database. Uses a conceptual or an implementation data model . • Exte ...
SAS® Data Integration Studio: Tips and Techniques for Implementing ELT
... SAS Data Integration Studio provides a library of standard transformations, including one for extracting. The Extract transformation enables you to select tables, columns, and rows to extract from various sources. Among others, the sources can be any database management system, file format, or SAS d ...
... SAS Data Integration Studio provides a library of standard transformations, including one for extracting. The Extract transformation enables you to select tables, columns, and rows to extract from various sources. Among others, the sources can be any database management system, file format, or SAS d ...
Tracking Specification Requirements Evolution: Database Approach
... Note that in the first case there is no need in field containing list of versions where element was excluded from the specification – it is quite reasonable to suggest that if an element was not included, then it was excluded. Versions to be stored in fields in both methods are not obligatory specif ...
... Note that in the first case there is no need in field containing list of versions where element was excluded from the specification – it is quite reasonable to suggest that if an element was not included, then it was excluded. Versions to be stored in fields in both methods are not obligatory specif ...
Best Practices for Running SQL Server on EMC XtremIO
... Typical SQL Server deployment pre-allocates 10% to 30% of space to anticipate data growth and to avoid data file auto-grow during run time. The portion of pre-allocated space is zero initialized but not yet written by SQL Server. With XtremIO, the portion of pre-allocated space is considered as whit ...
... Typical SQL Server deployment pre-allocates 10% to 30% of space to anticipate data growth and to avoid data file auto-grow during run time. The portion of pre-allocated space is zero initialized but not yet written by SQL Server. With XtremIO, the portion of pre-allocated space is considered as whit ...
CSR installation instructions
... temporary root (super-user) privileges. Not all users are allowed to use the sudo command. Please, make sure that the system administrator of your Linux machine has assigned the privileges to you so that you can type: sudo –s You will be prompted for your own user password. Typing it does not show a ...
... temporary root (super-user) privileges. Not all users are allowed to use the sudo command. Please, make sure that the system administrator of your Linux machine has assigned the privileges to you so that you can type: sudo –s You will be prompted for your own user password. Typing it does not show a ...
Hardware Sizing a Tabular Solution (SQL Server Analysis
... Many customers routinely use PowerPivot for Excel as a tool for testing how much compression they’ll get for their raw data. Although PowerPivot uses a slightly different compression algorithm, the compression engine is the same, allowing you to arrive at reasonable estimate when prototyping with th ...
... Many customers routinely use PowerPivot for Excel as a tool for testing how much compression they’ll get for their raw data. Although PowerPivot uses a slightly different compression algorithm, the compression engine is the same, allowing you to arrive at reasonable estimate when prototyping with th ...
Institutionen för datavetenskap Storing and structuring big data with business Fredrik Andersson
... important to know those properties because it affects the outcome of how the system performs. The relational model was very popular in the 1980s and 1990s due to that it allowed the database designer to minimize the data duplication within a database through a process called normalization. This was ...
... important to know those properties because it affects the outcome of how the system performs. The relational model was very popular in the 1980s and 1990s due to that it allowed the database designer to minimize the data duplication within a database through a process called normalization. This was ...
Understanding Common Oracle Wait Event - DOUG
... contains a great deal of information that can be found no where else in print. Performance monitoring and tuning with the Oracle Wait Interface is still new to many Oracle DBAs, even seasoned ones, precisely because the details of how to gather and interpret the information have been difficult to co ...
... contains a great deal of information that can be found no where else in print. Performance monitoring and tuning with the Oracle Wait Interface is still new to many Oracle DBAs, even seasoned ones, precisely because the details of how to gather and interpret the information have been difficult to co ...
OLAP Reporting Application using Office Web
... based OLAP Reporting Applications. Microsoft® Office Web Components are a collection of ActiveX® controls. These are used for adding spreadsheet, chart, and datamanipulation functionality to Web pages and for viewing the added components on the Web. The Office Web Components are programmable, we can ...
... based OLAP Reporting Applications. Microsoft® Office Web Components are a collection of ActiveX® controls. These are used for adding spreadsheet, chart, and datamanipulation functionality to Web pages and for viewing the added components on the Web. The Office Web Components are programmable, we can ...
WhatsUp Gold v16.1 Database Migration and Management Guide
... Microsoft SQL Server 2008 R2 Express Edition installed on the same computer as WhatsUp Gold to a local or remote instance of Microsoft SQL Server 2008 R2. To use this portion of the guide SQL Server Management Studio tools need to be installed. By default, the WhatsUp Gold installation does not incl ...
... Microsoft SQL Server 2008 R2 Express Edition installed on the same computer as WhatsUp Gold to a local or remote instance of Microsoft SQL Server 2008 R2. To use this portion of the guide SQL Server Management Studio tools need to be installed. By default, the WhatsUp Gold installation does not incl ...
Relational Model
... Also delete all Works_In tuples that refer to it. Disallow deletion of Employee tuple that is referred to. Set ssn to some default value Set ssn in Works_In to null, denoting `unknown’ ...
... Also delete all Works_In tuples that refer to it. Disallow deletion of Employee tuple that is referred to. Set ssn to some default value Set ssn in Works_In to null, denoting `unknown’ ...
Updating an MS SQL database from SAS
... whatever) and the list of declarations must be delimited by commas. Note that MS SQL has more types of columns (variables) than SAS. On the other hand this version does not have separate DATA and TIME types, it has just one DATETIME type. Furthermore, when SAS CREATEs an MS SQL table it looks at the ...
... whatever) and the list of declarations must be delimited by commas. Note that MS SQL has more types of columns (variables) than SAS. On the other hand this version does not have separate DATA and TIME types, it has just one DATETIME type. Furthermore, when SAS CREATEs an MS SQL table it looks at the ...
Microsoft Jet Database Engine
The Microsoft Jet Database Engine is a database engine on which several Microsoft products have been built. A database engine is the underlying component of a database, a collection of information stored on a computer in a systematic way. The first version of Jet was developed in 1992, consisting of three modules which could be used to manipulate a database.Database connect for MicrosoftJET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded for general use, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server Express. For larger database needs, Jet databases can be upgraded (or, in Microsoft parlance, ""up-sized"") to Microsoft's flagship database product, SQL Server.However, this does not mean that a MS Jet (Red) database cannot match MS SQL Server in storage capacity. A 5 billion record MS Jet (Red) database with compression and encryption turned on requires about 1 terabyte of disk storage space, comprising hundreds of (*.mdb) files, each acting as partial table, and not as a database in itself.Over the years, Jet has become almost synonymous with Microsoft Access, to the extent that many people refer to a Jet database as an ""Access database"".