System R
... 1) Scan over the qualifying rows of tableA, for each row, fetch the matching rows of table B 2) Sort the qualifying rows of Tables A andB in order by their respective join fields. Then scan over the sorted lists and merge them by matching values ...
... 1) Scan over the qualifying rows of tableA, for each row, fetch the matching rows of table B 2) Sort the qualifying rows of Tables A andB in order by their respective join fields. Then scan over the sorted lists and merge them by matching values ...
Powerpoint
... •Originally created by IBM in early 70s. Standardized by ANSI in 1986 •select attribute-list from table-list where condition name of field ...
... •Originally created by IBM in early 70s. Standardized by ANSI in 1986 •select attribute-list from table-list where condition name of field ...
SQL
... • SQL Server runs a service • accepts sql commands using their version of the standard query language • Allows access to the data inside the SQL server • Organized into databases • Tables (like spreadsheets) inside databases • Gui management interface – Access / mysql workbench / mssql studio mgr ...
... • SQL Server runs a service • accepts sql commands using their version of the standard query language • Allows access to the data inside the SQL server • Organized into databases • Tables (like spreadsheets) inside databases • Gui management interface – Access / mysql workbench / mssql studio mgr ...
AZ31349353
... mining step might identify multiple groups in the data, which can then be used to obtain more accurate prediction results by a decision support system. Neither the data collection and data preparation, nor result interpretation and reporting are part of the data mining step, but do belong to the ove ...
... mining step might identify multiple groups in the data, which can then be used to obtain more accurate prediction results by a decision support system. Neither the data collection and data preparation, nor result interpretation and reporting are part of the data mining step, but do belong to the ove ...
CS 340-Databases_Spring2010-11
... logical design, the relational model is discussed in detail due to its wide spread base during the last two decades. Relational operations and Structured Query Language are also practiced. An integral part of the course is the normalization theory which discusses a very important design issue of eli ...
... logical design, the relational model is discussed in detail due to its wide spread base during the last two decades. Relational operations and Structured Query Language are also practiced. An integral part of the course is the normalization theory which discusses a very important design issue of eli ...
Introduction to Databases
... • SELECT list FROM table WHERE condition • list - a list of items or * for all items – WHERE - a logical expression limiting the number of records selected – can be combined with Boolean logic: AND, OR, NOT – ORDER may be used to format results ...
... • SELECT list FROM table WHERE condition • list - a list of items or * for all items – WHERE - a logical expression limiting the number of records selected – can be combined with Boolean logic: AND, OR, NOT – ORDER may be used to format results ...
Databases - Relational Data Model
... A relation has a fixed number of columns, sometimes called attributes each of which has a name and a type. Each row of a relation represents a single data item and specifies actual values for each of the attributes. Therefore the relation AmericanPresident models an American president by his surname ...
... A relation has a fixed number of columns, sometimes called attributes each of which has a name and a type. Each row of a relation represents a single data item and specifies actual values for each of the attributes. Therefore the relation AmericanPresident models an American president by his surname ...
Spatial Query Languages
... VALUES(‘Mississippi’,‘USA’, 6000) If all the attributes of the relation are not specified, then default values are automatically substituted. The most often used default value is NULL. An attempt to add another row in the River table with Name = ‘Mississippi’ will be rejected by the DBMS because of ...
... VALUES(‘Mississippi’,‘USA’, 6000) If all the attributes of the relation are not specified, then default values are automatically substituted. The most often used default value is NULL. An attempt to add another row in the River table with Name = ‘Mississippi’ will be rejected by the DBMS because of ...
Lecture 2
... elegant; a database is a collection of one or more relations, where each relation is a table with rows and columns. This simple tabular representation enables even novice users to understand the contents of a database, and it permits the use of simple, high-level languages to query the data. FDIBA ...
... elegant; a database is a collection of one or more relations, where each relation is a table with rows and columns. This simple tabular representation enables even novice users to understand the contents of a database, and it permits the use of simple, high-level languages to query the data. FDIBA ...
database_design
... • SELECT list FROM table WHERE condition • list - a list of items or * for all items – WHERE - a logical expression limiting the number of records selected – can be combined with Boolean logic: AND, OR, NOT – ORDER may be used to format results ...
... • SELECT list FROM table WHERE condition • list - a list of items or * for all items – WHERE - a logical expression limiting the number of records selected – can be combined with Boolean logic: AND, OR, NOT – ORDER may be used to format results ...
Analytical Processing
... cache management, serialization, redundancy models, join operations and indexing methods are not well-suited for analytical workloads. ...
... cache management, serialization, redundancy models, join operations and indexing methods are not well-suited for analytical workloads. ...
Query / Restrict Operations with Relational Tables
... Query / Restrict Operations with Relational Tables • Each record is inspected and is added to the selected set if it meets one to several conditions. • AND, OR and NOT may be applied alone or in combinations. • AND typically decreases the number of records ...
... Query / Restrict Operations with Relational Tables • Each record is inspected and is added to the selected set if it meets one to several conditions. • AND, OR and NOT may be applied alone or in combinations. • AND typically decreases the number of records ...
slides
... revoke select on department from Amit, Satoshi cascade; revoke select on department from Amit, Satoshi restrict; ...
... revoke select on department from Amit, Satoshi cascade; revoke select on department from Amit, Satoshi restrict; ...
ppt
... Horizontal partitioning – tuples of a relation are divided among many disks such that each tuple resides on one disk. (number of disks = n): Round-robin partitioning: Send the ith tuple inserted in the relation to disk i mod n. Hash partitioning: Choose one or more attributes as the partitioning ...
... Horizontal partitioning – tuples of a relation are divided among many disks such that each tuple resides on one disk. (number of disks = n): Round-robin partitioning: Send the ith tuple inserted in the relation to disk i mod n. Hash partitioning: Choose one or more attributes as the partitioning ...
Template file - Goldsmiths, University of London
... query and modify a database; you can now implement your own database (even though, it probably will be far from a good design) ...
... query and modify a database; you can now implement your own database (even though, it probably will be far from a good design) ...
PowerPoint Template
... distant organization that cannot readily access the original. DBMS usually provide utilities to facilitate the process of extracting and disseminating attribute sets. When data is replicated between database servers, so that the information remains consistent throughout the database system and users ...
... distant organization that cannot readily access the original. DBMS usually provide utilities to facilitate the process of extracting and disseminating attribute sets. When data is replicated between database servers, so that the information remains consistent throughout the database system and users ...
Slides on Utility Classes and JDBC
... under the DriverManager class String argument: "jdbc:driver:name” returns a Connection object ...
... under the DriverManager class String argument: "jdbc:driver:name” returns a Connection object ...
CSC 443 – Database Management Systems Data and Its Structure
... Attribute A1 is a foreign key of R1 referring to attribute A2 in R2, if whenever there is a value v of A1, there is a tuple of R2 in which A2 has value v, and A2 is a key of R2 – This is a special case of referential integrity: A2 must be a candidate key of R2 (e.g., CrsCode is a key of Course in th ...
... Attribute A1 is a foreign key of R1 referring to attribute A2 in R2, if whenever there is a value v of A1, there is a tuple of R2 in which A2 has value v, and A2 is a key of R2 – This is a special case of referential integrity: A2 must be a candidate key of R2 (e.g., CrsCode is a key of Course in th ...
reldb03
... Figure 3.6: Easy-to-use End User Interface Such interfaces are usually in the form of simple, user-friendly screens comprising easy-to-learn languages, a series of menus, fill-in-the-blank data-entry panels or report screens - sufficient for the user to check, edit and format data, make queries, or ...
... Figure 3.6: Easy-to-use End User Interface Such interfaces are usually in the form of simple, user-friendly screens comprising easy-to-learn languages, a series of menus, fill-in-the-blank data-entry panels or report screens - sufficient for the user to check, edit and format data, make queries, or ...
Database Systems: The Complete Book (DS:CB), by Hector Garcia
... 1) some conventional homework questions will be assigned each week, 2) steps of your database application, 3) small exercises using EU-BID or EU-Lease (from fall quarter) on which we will learn to write SQL queries and Java programs with embedded SQL. There will be midterm and (short) final exams, a ...
... 1) some conventional homework questions will be assigned each week, 2) steps of your database application, 3) small exercises using EU-BID or EU-Lease (from fall quarter) on which we will learn to write SQL queries and Java programs with embedded SQL. There will be midterm and (short) final exams, a ...
