PowerPoint 97
... • An attribute value must match its type. • A primary key must be unique. • A tuple’s foreign key must be of the same type as its “matching” primary key. • To create a record with a given foreign key, a record in the corresponding table must have that value as its primary key. • Many to many relatio ...
... • An attribute value must match its type. • A primary key must be unique. • A tuple’s foreign key must be of the same type as its “matching” primary key. • To create a record with a given foreign key, a record in the corresponding table must have that value as its primary key. • Many to many relatio ...
第11 章
... 11.7 DBMS Performance Tuning • Includes managing DBMS processes in primary memory and structures in physical storage • DBMS performance tuning at server end focuses on setting parameters used for: – Data cache: large enough – SQL cache: same query may be submitted by many users – Sort cache – Optim ...
... 11.7 DBMS Performance Tuning • Includes managing DBMS processes in primary memory and structures in physical storage • DBMS performance tuning at server end focuses on setting parameters used for: – Data cache: large enough – SQL cache: same query may be submitted by many users – Sort cache – Optim ...
WINDOWS PRESENTATION FOUNDATION APPLICATION DEVELOPMENT FOR A MOVIE THEATER
... Having stated the problems, and getting our database ready, it was a bit hard to decide whether the application is really important from the cinema point of view. Does our application really work fine with the database of the theatre? How useful is it?? Does our design make it easy to use or not? An ...
... Having stated the problems, and getting our database ready, it was a bit hard to decide whether the application is really important from the cinema point of view. Does our application really work fine with the database of the theatre? How useful is it?? Does our design make it easy to use or not? An ...
Java Interface to Databases (JDBC)
... ResultSet class populated with a number of rows. Each row contains 3 values: "cname", "pname" and "qnt". Basically, an instance of the ResultSet class is an iterator over the rows it keeps. There is always the current row, and we can obtain only the data from the current row. If we want to move the ...
... ResultSet class populated with a number of rows. Each row contains 3 values: "cname", "pname" and "qnt". Basically, an instance of the ResultSet class is an iterator over the rows it keeps. There is always the current row, and we can obtain only the data from the current row. If we want to move the ...
system privileges
... SELECT privilege can be restricted by creating a view with a subset of columns and granting the SELECT privilege only on the view. 4. A privilege granted on a synonym is converted to a privilege on the base table referenced by the synonym. In other words, a synonym is simply a new, easier-to-use n ...
... SELECT privilege can be restricted by creating a view with a subset of columns and granting the SELECT privilege only on the view. 4. A privilege granted on a synonym is converted to a privilege on the base table referenced by the synonym. In other words, a synonym is simply a new, easier-to-use n ...
database
... How is indexing different from sorting? Figure 10-36 • A database index contains a list of keys, and each key provides a pointer to the record that contains the rest of the fields related to that key • An index has no bearing on the physical sequence of records on disk • A table can have multiple i ...
... How is indexing different from sorting? Figure 10-36 • A database index contains a list of keys, and each key provides a pointer to the record that contains the rest of the fields related to that key • An index has no bearing on the physical sequence of records on disk • A table can have multiple i ...
Life Sciences Platform
... enabling large scale sequencing "We trust Oracle in its ability to run terabyte-class databases in Provide reliable back up and clustered environments with recovery of vast amounts of data ...
... enabling large scale sequencing "We trust Oracle in its ability to run terabyte-class databases in Provide reliable back up and clustered environments with recovery of vast amounts of data ...
Database Design using UML
... An RDB does not support abstract data types (ADT), all attribute values must be atomic and relations must be in first normal form (flat relation). An ORDB supports ADTs, attributes can be multivalued, and does not require first normal form. The underlying basic data structures of RDBs are much simpl ...
... An RDB does not support abstract data types (ADT), all attribute values must be atomic and relations must be in first normal form (flat relation). An ORDB supports ADTs, attributes can be multivalued, and does not require first normal form. The underlying basic data structures of RDBs are much simpl ...
Creating views on SQL Server Functions and Stored Procedures
... Virtual DataPort allows connecting to databases using JDBC data sources. Once the connection to the database is set base views can be created in VDP. These base views can be created in two ways: ● Importing a database table, function or stored procedure directly from the graphical interface using in ...
... Virtual DataPort allows connecting to databases using JDBC data sources. Once the connection to the database is set base views can be created in VDP. These base views can be created in two ways: ● Importing a database table, function or stored procedure directly from the graphical interface using in ...
Query - delab-auth
... SQL - General Information is a standard query language for relational databases It support logical data model concepts, such as relations, keys, ... Supported by major brands, e.g. IBM DB2, Oracle, MS SQL Server, Sybase, ... 3 versions: SQL1 (1986), SQL2 (1992), SQL 3 (1999) Can express common data ...
... SQL - General Information is a standard query language for relational databases It support logical data model concepts, such as relations, keys, ... Supported by major brands, e.g. IBM DB2, Oracle, MS SQL Server, Sybase, ... 3 versions: SQL1 (1986), SQL2 (1992), SQL 3 (1999) Can express common data ...
Role Based Security - Oracle Software Downloads
... cannot even access the database nor execute the SHOW_MY_DATA procedure. So no special action needs to be taken for unclassified users. There are several benefits of this role based scheme; it makes security maintenance much easier, and there is less user information stored in the database. Consider ...
... cannot even access the database nor execute the SHOW_MY_DATA procedure. So no special action needs to be taken for unclassified users. There are several benefits of this role based scheme; it makes security maintenance much easier, and there is less user information stored in the database. Consider ...
Lec. notes
... The hospital database stores data about patients, their admission and discharge from hospital’s departments and their treatments. For each patient, we know the name, address, sex, social security number. For each department we know the department’s name, its location, the name of the doctor who head ...
... The hospital database stores data about patients, their admission and discharge from hospital’s departments and their treatments. For each patient, we know the name, address, sex, social security number. For each department we know the department’s name, its location, the name of the doctor who head ...
Application Development in Web Mapping 2. Spatial Data Storage
... To store spatial data in files sometimes is a good solution. However using a database to store geometry has some advantages: • Attributes and geometry of features are stored together. • Spatial indexing makes drawing faster at larger scales. • Spatial databases allow you to perform spatial queries a ...
... To store spatial data in files sometimes is a good solution. However using a database to store geometry has some advantages: • Attributes and geometry of features are stored together. • Spatial indexing makes drawing faster at larger scales. • Spatial databases allow you to perform spatial queries a ...
Become a SQL Server DBA - Madeira | Data Solutions
... aspects of DBA work and all the components and features in SQL Server. The course begins with relational database basics, and goes through all the development as well as administration aspects of SQL Server. It also provides an introduction to the world of business intelligence (BI). The course is b ...
... aspects of DBA work and all the components and features in SQL Server. The course begins with relational database basics, and goes through all the development as well as administration aspects of SQL Server. It also provides an introduction to the world of business intelligence (BI). The course is b ...
CS chit-chat - ERI people pages
... • Gazetteer is an instance of a much more general problem • To wit: – how to describe the automatic translation of dynamic queries written in an abstract query language to SQL – in an easy, powerful, flexible way – making as few assumptions as possible about the underlying schema – and producing “re ...
... • Gazetteer is an instance of a much more general problem • To wit: – how to describe the automatic translation of dynamic queries written in an abstract query language to SQL – in an easy, powerful, flexible way – making as few assumptions as possible about the underlying schema – and producing “re ...
mod-C
... Inheritance Object orientation Including object identifiers and references Not fully implemented in any database system currently But some features are present in each of the major commercial database systems Read the manual of your database system to see what it ...
... Inheritance Object orientation Including object identifiers and references Not fully implemented in any database system currently But some features are present in each of the major commercial database systems Read the manual of your database system to see what it ...
Information Systems And Databases - MDCC
... Description specifies the contents of the field. A data dictionary is a fundamental tool in the development of a database. It consists of metadata, or information about data. It provides a common ground for people working on a project at the same time. For example, if people are 48 Core working on ...
... Description specifies the contents of the field. A data dictionary is a fundamental tool in the development of a database. It consists of metadata, or information about data. It provides a common ground for people working on a project at the same time. For example, if people are 48 Core working on ...
Using SQL Queries to Generate XML
... language is a language that uses tags or other symbols that are embedded in a document, and defines how the document content appears or acts. HTML is a markup language that uses embedded tags to control the appearance and functions of Web pages. Early developers used SGML to create document type def ...
... language is a language that uses tags or other symbols that are embedded in a document, and defines how the document content appears or acts. HTML is a markup language that uses embedded tags to control the appearance and functions of Web pages. Early developers used SGML to create document type def ...
PPT - LSC
... Q Replication – Defining Subsets or Filters Subset data Subset of rows through Q Capture predicate on subscription/publication Subset of columns through subscription/publication definition Option included for ignoring deletes Signal defined to allow user selected transactions to be ignored ...
... Q Replication – Defining Subsets or Filters Subset data Subset of rows through Q Capture predicate on subscription/publication Subset of columns through subscription/publication definition Option included for ignoring deletes Signal defined to allow user selected transactions to be ignored ...
detection and prevention of tautology and union query
... In tautology-based attack attacker injects code in one or more conditional statements so that they always evaluate to true. Consider a website‟s page in which SQL query is dynamically created and includes user input fields. The following query is used for fetching information about books: “SELECT * ...
... In tautology-based attack attacker injects code in one or more conditional statements so that they always evaluate to true. Consider a website‟s page in which SQL query is dynamically created and includes user input fields. The following query is used for fetching information about books: “SELECT * ...
The Case For Change Notifications in Pull-Based
... to change notifications. In recent years, new database systems have emerged that aim to provide real-time change notifications in a scalable manner, but they provide only vendor-specific solutions. Existing applications working on a purely pull-based database have to either switch the underlying dat ...
... to change notifications. In recent years, new database systems have emerged that aim to provide real-time change notifications in a scalable manner, but they provide only vendor-specific solutions. Existing applications working on a purely pull-based database have to either switch the underlying dat ...
Dynamic Query Forms for Database Queries
... • Modern scientific databases and web databases maintain large and heterogeneous data. These real-world databases contain over hundreds or even thousands of relations and attributes. Traditional predefined query forms are not able to satisfy various ad-hoc queries from users on those databases. This ...
... • Modern scientific databases and web databases maintain large and heterogeneous data. These real-world databases contain over hundreds or even thousands of relations and attributes. Traditional predefined query forms are not able to satisfy various ad-hoc queries from users on those databases. This ...
Powerpoint - SQL Saturday
... • You can SPLIT a db into multiple. • You can MERGE multiple dbs into one. • These operations allow to respond to changes in capacity needs. • It’s delivered as a customer-hosted Azure service. ...
... • You can SPLIT a db into multiple. • You can MERGE multiple dbs into one. • These operations allow to respond to changes in capacity needs. • It’s delivered as a customer-hosted Azure service. ...