w03_1_INF280_Relational_Model
... Relational Model represents database as a collection of relations. • A relation may be considered as a table of values, where each row represents a collection of related values, forming an instance, a fact, corresponding with an entity in an entity-set. • Table-name and columns-names are used to int ...
... Relational Model represents database as a collection of relations. • A relation may be considered as a table of values, where each row represents a collection of related values, forming an instance, a fact, corresponding with an entity in an entity-set. • Table-name and columns-names are used to int ...
Standard Query Language (SQL)
... SQL has gone through many standards: starting with SQL-86 or SQL 1.A. SQL-92 is referred to as SQL-2. Later standards (from SQL-1999) are divided into core specification and specialized extensions. The extensions are implemented for different applications – such as data mining, data ...
... SQL has gone through many standards: starting with SQL-86 or SQL 1.A. SQL-92 is referred to as SQL-2. Later standards (from SQL-1999) are divided into core specification and specialized extensions. The extensions are implemented for different applications – such as data mining, data ...
Analytical databases
... Multidimensional databases are most popular due to analytical data model of the form of multidimensional cube ...
... Multidimensional databases are most popular due to analytical data model of the form of multidimensional cube ...
Multiple Choice Tutorial
... A user is anyone who needs to access some portion of the data. They may range from application programmers to casual users with adhoc queries. Each user has a language at ...
... A user is anyone who needs to access some portion of the data. They may range from application programmers to casual users with adhoc queries. Each user has a language at ...
Programming Example: The Seek method
... That’s easy enough; we will create a query and get it over and done with. Check the query result, and make a note of the information, there should be one record for each order. Save the query as qryOrderTotalsByDate, and close it. ...
... That’s easy enough; we will create a query and get it over and done with. Check the query result, and make a note of the information, there should be one record for each order. Save the query as qryOrderTotalsByDate, and close it. ...
Learning PHP and MySQL: by Knowledge flow
... Internal (built-in) function These are already set in the library. There also function that requires certain specified PHP extension compiled. Example To create image function we use imagecreatetruecolor (). Anonymous function This function is also known as closure, this has no specific name. Exampl ...
... Internal (built-in) function These are already set in the library. There also function that requires certain specified PHP extension compiled. Example To create image function we use imagecreatetruecolor (). Anonymous function This function is also known as closure, this has no specific name. Exampl ...
Chapter 4: SQL
... Note that we do not need to use the having clause, since we compute in the from clause the temporary relation result, and the attributes of result can be used directly in the where clause. ...
... Note that we do not need to use the having clause, since we compute in the from clause the temporary relation result, and the attributes of result can be used directly in the where clause. ...
From Conceptual Model to Relational Model
... 4. Compare the consolidated logical database design with the translated E-R model and produce one final logical database model for the application. ...
... 4. Compare the consolidated logical database design with the translated E-R model and produce one final logical database model for the application. ...
Objects Naming Standards
... that action as a value. The following guidelines have to be enforced while naming a Userdefined Function– 1. The first part of the UDF name should be Udf_ 2. The second part of the UDF name should have the general prefix that is being used for the module or process to which the UDF belongs. For exam ...
... that action as a value. The following guidelines have to be enforced while naming a Userdefined Function– 1. The first part of the UDF name should be Udf_ 2. The second part of the UDF name should have the general prefix that is being used for the module or process to which the UDF belongs. For exam ...
Is Your Database System a Semantic Web Reasoner?
... then merge the results (i.e., eliminate duplicates3 ). As usual, this may require significant additional resources depending on the results’ size. Query rewriting in this sense is the most popular approach to OBQA for the lightweight ontology language OWL QL [7]. In many such applications, a traditi ...
... then merge the results (i.e., eliminate duplicates3 ). As usual, this may require significant additional resources depending on the results’ size. Query rewriting in this sense is the most popular approach to OBQA for the lightweight ontology language OWL QL [7]. In many such applications, a traditi ...
Query Processing, optimization, and indexing techniques What`s this
... key value Ki, or to a bucket of pointers to file records, each record having search-key value Ki. Only need bucket structure if search-key does not form a primary key. If Li, Lj are leaf nodes and i < j, Li’s search-key values are less than Lj’s ...
... key value Ki, or to a bucket of pointers to file records, each record having search-key value Ki. Only need bucket structure if search-key does not form a primary key. If Li, Lj are leaf nodes and i < j, Li’s search-key values are less than Lj’s ...
slides Topic slides
... Retrieval of data from one or more columns from one or more rows typically based on some condition. Insert. Insert an entire row with all columns into the table. Update. Modification of one or more columns from one or more rows typically based on some condition. Delete. Removal of a row typica ...
... Retrieval of data from one or more columns from one or more rows typically based on some condition. Insert. Insert an entire row with all columns into the table. Update. Modification of one or more columns from one or more rows typically based on some condition. Delete. Removal of a row typica ...
BLAST with BioPython
... blast_result.write(result_handle.read()) blast_result.close() result_handle.close() This creates a file on your computer (in the current directory used by Python) called "my_blast.xml". XML is the most computer friendly format for BLAST output, especially if you will be using BioPython to parse the ...
... blast_result.write(result_handle.read()) blast_result.close() result_handle.close() This creates a file on your computer (in the current directory used by Python) called "my_blast.xml". XML is the most computer friendly format for BLAST output, especially if you will be using BioPython to parse the ...
Language Integrated Query: An introduction
... •Only defines query, not update or context LINQ To SQL •Mapping is set at compile time •Can not mix mapped and unmapped properties in a single query •Microsoft SQL Server 2000, 2005 only ...
... •Only defines query, not update or context LINQ To SQL •Mapping is set at compile time •Can not mix mapped and unmapped properties in a single query •Microsoft SQL Server 2000, 2005 only ...
marked - Kansas State University
... What About Smaller Schemas? Suppose we had started with bor_loan. How would we know to split up (decompose) it into borrower and loan? Write a rule “if there were a schema (loan_number, amount), then loan_number would be a candidate key” Denote as a functional dependency: loan_number amount ...
... What About Smaller Schemas? Suppose we had started with bor_loan. How would we know to split up (decompose) it into borrower and loan? Write a rule “if there were a schema (loan_number, amount), then loan_number would be a candidate key” Denote as a functional dependency: loan_number amount ...
An Online Travel Agency Using PHP
... $sql_result = mysql_query($sql,$connection) or die("Could not execute query 2."); while( $row = mysql_fetch_array($sql_result) ){ $tripID = $row[0]; $name = $row[1]; $date = $row[2]; $cost = $row[3]; $cost = sprintf("$%0.2f",$cost); $filled = $row[4]; $maxPeople = $row[5]; ...
... $sql_result = mysql_query($sql,$connection) or die("Could not execute query 2."); while( $row = mysql_fetch_array($sql_result) ){ $tripID = $row[0]; $name = $row[1]; $date = $row[2]; $cost = $row[3]; $cost = sprintf("$%0.2f",$cost); $filled = $row[4]; $maxPeople = $row[5]; ...
Architectures for MLS Database Management Systems
... to be formally modeled and verified. These were very difficult requirements, and great advances toward solving these problems have been made in this project. In the SeaView approach, a multilevel relation is decomposed into single-level relations, based on element-level labeling. Each tuple is then ...
... to be formally modeled and verified. These were very difficult requirements, and great advances toward solving these problems have been made in this project. In the SeaView approach, a multilevel relation is decomposed into single-level relations, based on element-level labeling. Each tuple is then ...
Slide 1
... Ideal for cloning within a large organization and hosted DBs Hot cloning with no downtime of source DB Works well for large DBs Can be used with features like "Convert to RAC" to do RAC to RAC cloning *OR* moving to RAC. – Advantage: easy to use ...
... Ideal for cloning within a large organization and hosted DBs Hot cloning with no downtime of source DB Works well for large DBs Can be used with features like "Convert to RAC" to do RAC to RAC cloning *OR* moving to RAC. – Advantage: easy to use ...
Document
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (example: 2nd column of r deals with the same type of values as does the 2nd column of s) Example: to find all courses taught in the Fall 2009 semester, or in the ...
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (example: 2nd column of r deals with the same type of values as does the 2nd column of s) Example: to find all courses taught in the Fall 2009 semester, or in the ...
Document
... Rather than modify compiler, add library with database calls (API) • Special standardized interface: procedures/objects • Pass SQL strings from language, presents result sets in a language-friendly way • Sun’s JDBC: Java API • Supposedly DBMS-neutral ...
... Rather than modify compiler, add library with database calls (API) • Special standardized interface: procedures/objects • Pass SQL strings from language, presents result sets in a language-friendly way • Sun’s JDBC: Java API • Supposedly DBMS-neutral ...
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"".