Oracle database concepts A database schema is a logical container
... The data dictionary base tables are the first objects created in any Oracle database. All data dictionary tables and views for a database are stored in the SYSTEM tablespace. Because the SYSTEM tablespace is always online when the database is open, the data dictionary is always available when the da ...
... The data dictionary base tables are the first objects created in any Oracle database. All data dictionary tables and views for a database are stored in the SYSTEM tablespace. Because the SYSTEM tablespace is always online when the database is open, the data dictionary is always available when the da ...
Web pages use more than HTML or XHTML
... • Record -- one row of a relational database table • Field -- one column of a relational database table • Entity (i.e., record) -- a person, place or thing represented in a database table row • Attribute -- a category of information related to an entity • Linking attribute -- common attribute betwee ...
... • Record -- one row of a relational database table • Field -- one column of a relational database table • Entity (i.e., record) -- a person, place or thing represented in a database table row • Attribute -- a category of information related to an entity • Linking attribute -- common attribute betwee ...
The Object-Oriented Database System Manifesto Malcolm Atkinson
... Complex objects are built from simpler ones by applying constructors to them. The simplest objects are objects such as integers, characters, byte strings of any length, booleans and floats (one might add other atomic types). There are various complex object constructors: tuples, sets, bags, lists, ...
... Complex objects are built from simpler ones by applying constructors to them. The simplest objects are objects such as integers, characters, byte strings of any length, booleans and floats (one might add other atomic types). There are various complex object constructors: tuples, sets, bags, lists, ...
PROC SQL: A Powerful Tool to Improve Your Data Quality
... In this table, five faulty records are presented: an incorrect input of “DOB” in row 1 and 2, the wrong “Height” unit applied in row 3, and incorrect FirstName value in the last row. Some of the required values like Gender in row 3 and DOB in row 4 are left blank. The age column is a calculated fiel ...
... In this table, five faulty records are presented: an incorrect input of “DOB” in row 1 and 2, the wrong “Height” unit applied in row 3, and incorrect FirstName value in the last row. Some of the required values like Gender in row 3 and DOB in row 4 are left blank. The age column is a calculated fiel ...
Chapter 7 Introduction to SQL
... Selecting File organizations for base tables that match type of processing (keeping table physically sorted by a frequently used sort key) Selecting File organizations for indexes appropriate to the way the indexes are used. Data clustering so that related rows of frequently joined tables are stored ...
... Selecting File organizations for base tables that match type of processing (keeping table physically sorted by a frequently used sort key) Selecting File organizations for indexes appropriate to the way the indexes are used. Data clustering so that related rows of frequently joined tables are stored ...
Chapter 13
... • Advanced OLAP features more useful when access is simple • Many interface features are “borrowed” from previous generations of data analysis tools – Already familiar to end users – Makes OLAP easily accepted and readily used ...
... • Advanced OLAP features more useful when access is simple • Many interface features are “borrowed” from previous generations of data analysis tools – Already familiar to end users – Makes OLAP easily accepted and readily used ...
CSE880_Presentation_Cloud
... - Project Deuteronomy and Hyder, persistent data layer is separate from the logic that executes operations on that data,on the other hand in Amazon EC2, each node is data node and the transaction processor ...
... - Project Deuteronomy and Hyder, persistent data layer is separate from the logic that executes operations on that data,on the other hand in Amazon EC2, each node is data node and the transaction processor ...
blast
... Significance of a hit: example Search against a database of 10,000 sequences. An extreme-value distribution (blue) is fitted to the distribution of all scores. It is found that 99.9% of the blue distribution has a score below 112. This means that when searching a database of 10,000 sequences you’d ...
... Significance of a hit: example Search against a database of 10,000 sequences. An extreme-value distribution (blue) is fitted to the distribution of all scores. It is found that 99.9% of the blue distribution has a score below 112. This means that when searching a database of 10,000 sequences you’d ...
Searching the Deep Web What is
... – crawl for HTML pages containing forms that access databases – for each form • execute many queries to database using form – how choose queries? • index each resulting HTML page as part of general index of Web pages – pulls database information to surface ...
... – crawl for HTML pages containing forms that access databases – for each form • execute many queries to database using form – how choose queries? • index each resulting HTML page as part of general index of Web pages – pulls database information to surface ...
(A) R - UCLA Computer Science
... Third Normal Form: Motivation There are some situations where ...
... Third Normal Form: Motivation There are some situations where ...
Multitable Clustering File Organization
... Store several relations in one file using a multitable clustering file organization ...
... Store several relations in one file using a multitable clustering file organization ...
OnLine Analytical Problem (OLAP)
... gigabytes and terabytes and summarizing this data into a form information that can by used by business analysts. ...
... gigabytes and terabytes and summarizing this data into a form information that can by used by business analysts. ...
ClearPass_SQL_Lookup_Tech_Note
... ClearPass SQL Lookup Tech Note The purpose of this tech note is to show how to configure ClearPass to query an external database. For the purpose of this example, the internal database will be used. This will allow you to try it out without having to setup a new database server. In this example we a ...
... ClearPass SQL Lookup Tech Note The purpose of this tech note is to show how to configure ClearPass to query an external database. For the purpose of this example, the internal database will be used. This will allow you to try it out without having to setup a new database server. In this example we a ...
Cracking the Database Store
... includes (or is assigned) a unique (i.e., duplicate-free) surrogate (oid), that allows simple reconstruction by means of a natural 1:1-join between the surrogates of both pieces. ...
... includes (or is assigned) a unique (i.e., duplicate-free) surrogate (oid), that allows simple reconstruction by means of a natural 1:1-join between the surrogates of both pieces. ...
mod-12
... block of the index. Cost of the join: br (tT + tS) + nr c Where c is the cost of traversing index and fetching all matching s tuples for one tuple or r c can be estimated as cost of a single selection on s using the join condition. If indices are available on join attributes of both r and s, ...
... block of the index. Cost of the join: br (tT + tS) + nr c Where c is the cost of traversing index and fetching all matching s tuples for one tuple or r c can be estimated as cost of a single selection on s using the join condition. If indices are available on join attributes of both r and s, ...
Statement
... Calling next() the first time makes the cursor points to the first row (If there is one). next() returns false if there is no more row in the result set. Otherwise it returns true. ...
... Calling next() the first time makes the cursor points to the first row (If there is one). next() returns false if there is no more row in the result set. Otherwise it returns true. ...
Outline of topics covered in the SQL fundamental series
... SQL Fundamentals1 – Overview Prepared by Jennifer Kreie, Associate Professor Accounting & Information Systems Department College of Business, New Mexico State University The purpose of this set of Power Point slides and videos is to introduce SQL fundamentals using the Oracle database software and O ...
... SQL Fundamentals1 – Overview Prepared by Jennifer Kreie, Associate Professor Accounting & Information Systems Department College of Business, New Mexico State University The purpose of this set of Power Point slides and videos is to introduce SQL fundamentals using the Oracle database software and O ...
Visual Basic Database Access
... • Command Object: The command object allows us to execute a SQL statement or a stored procedure. • DataReader: It is a read-only and forward-only pointer into a table to retrieve records. • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This ...
... • Command Object: The command object allows us to execute a SQL statement or a stored procedure. • DataReader: It is a read-only and forward-only pointer into a table to retrieve records. • DataSet Object: A DataSet object can hold several tables and relationships between tables. • DataAdapter: This ...
Introduction Introduction to OLAP
... quantitative data in an OLAP database. For example, values such as sales, budget, cost, and so on, are all examples of measures. Measure values are organized in data cubes according to dimensions ...
... quantitative data in an OLAP database. For example, values such as sales, budget, cost, and so on, are all examples of measures. Measure values are organized in data cubes according to dimensions ...
07statisticalDB - Emory Math/CS Department
... Ineffective for cooperation of several users Statistics for a set and its subset cannot be ...
... Ineffective for cooperation of several users Statistics for a set and its subset cannot be ...
Entity Framework
... To specify a primary key, the attribute [Key] can be used on the property. This is more specific and allows setting a primary key to another name than «tableId». To specify a foreign key, the attribute [ForeignKey] can be used. Note that the foreign key also must follow the naming convention «tabl ...
... To specify a primary key, the attribute [Key] can be used on the property. This is more specific and allows setting a primary key to another name than «tableId». To specify a foreign key, the attribute [ForeignKey] can be used. Note that the foreign key also must follow the naming convention «tabl ...
Slide 1 - Pass4Sure
... than in each database that uses the template, which results in less disk space used by the database. For instance, using the single copy template with a mail template stores all the design information in one place, making users¡¦ mail databases smaller because the databases no longer have to store t ...
... than in each database that uses the template, which results in less disk space used by the database. For instance, using the single copy template with a mail template stores all the design information in one place, making users¡¦ mail databases smaller because the databases no longer have to store t ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.