Overview of Relational Database
... desire. • regardless of the physical order in which these values are stored. ...
... desire. • regardless of the physical order in which these values are stored. ...
Introduction to Database Systems
... represent information to users. Data Manipulation Language (DML). Used to query & update data. ...
... represent information to users. Data Manipulation Language (DML). Used to query & update data. ...
Multi-Dimensional Databases
... source data and dimensional data, in fact usually one source will create multiple dimensions or multiple source data will create one dimension. Every fact should have a default aggregation. Even if that aggregation is No Aggregation. ...
... source data and dimensional data, in fact usually one source will create multiple dimensions or multiple source data will create one dimension. Every fact should have a default aggregation. Even if that aggregation is No Aggregation. ...
Transactions and Locks
... • Recover happens every time SQL Server starts up. – SQL server applies every committed transaction in log since last checkpoint to database file(s). – Any changes to log that are not committed are rolled back – See figure 14-2 ...
... • Recover happens every time SQL Server starts up. – SQL server applies every committed transaction in log since last checkpoint to database file(s). – Any changes to log that are not committed are rolled back – See figure 14-2 ...
lecture6_old - University of Vermont
... Double precision (like single, with a greater range) •string (text: numbers can be represented as text, but they have no numerical properties) •Boolean (yes, no) •Object (holds data objects) ...
... Double precision (like single, with a greater range) •string (text: numbers can be represented as text, but they have no numerical properties) •Boolean (yes, no) •Object (holds data objects) ...
Database first approach Code First approach
... having to open a designer or define an XML mapping file ...
... having to open a designer or define an XML mapping file ...
Database Planning and Database Architecture
... Data occurrences-extension Database itself Data instances files ...
... Data occurrences-extension Database itself Data instances files ...
Corporate PPT Template
... Can use files or direct network transfer Dynamic configuration, resumable operations Client can detach and reconnect Can be parallelized using PARALLEL ...
... Can use files or direct network transfer Dynamic configuration, resumable operations Client can detach and reconnect Can be parallelized using PARALLEL ...
Corporate PPT Template - Universidad Nacional De Colombia
... Can use files or direct network transfer Dynamic configuration, resumable operations Client can detach and reconnect Can be parallelized using PARALLEL ...
... Can use files or direct network transfer Dynamic configuration, resumable operations Client can detach and reconnect Can be parallelized using PARALLEL ...
DATABASE MANAGEMENT SYSTEMS 1. Define Database
... The relational algebra is a procedural query language. It consists of a set of operations that take one or two relation as input and produce a new relation as output. 38. What is a SELECT operation? The select operation selects tuples that satisfy a given predicate. We use the lowercase letter σ to ...
... The relational algebra is a procedural query language. It consists of a set of operations that take one or two relation as input and produce a new relation as output. 38. What is a SELECT operation? The select operation selects tuples that satisfy a given predicate. We use the lowercase letter σ to ...
The Relational Database Model
... A field is said to contain a null value when it contains nothing at all. Fields can create complexities in calculations and have consequences for data accuracy. For this reason, many fields are specifically set not to contain NULL values. A key is a logical way to access a record in a table. For exa ...
... A field is said to contain a null value when it contains nothing at all. Fields can create complexities in calculations and have consequences for data accuracy. For this reason, many fields are specifically set not to contain NULL values. A key is a logical way to access a record in a table. For exa ...
BI Session-SQL_Server_Analysis_Services
... A dimension that contains a parent attribute A parent attribute describes a self-referencing relationship, or a self-join, within a dimension table ...
... A dimension that contains a parent attribute A parent attribute describes a self-referencing relationship, or a self-join, within a dimension table ...
LabVIEW – MySQL interface
... Check if files are present. Write all new test results Read the new data Check Read-Write Log file is generated ...
... Check if files are present. Write all new test results Read the new data Check Read-Write Log file is generated ...
Link to Slides
... Types of Data Distributions Complete Replication - each site has the complete database Partitioned - each site has a fragment of the database, but each fragment only exists at one site. Partial Replication - each site has a fragment of the database, but fragment exists in multiple copies across the ...
... Types of Data Distributions Complete Replication - each site has the complete database Partitioned - each site has a fragment of the database, but each fragment only exists at one site. Partial Replication - each site has a fragment of the database, but fragment exists in multiple copies across the ...
assin_-1_1
... that data remains consistence despite system failures and concurrent transactions proceed without any conflicting. And they are also responsible for allocating of space on disk storage and are also responsible for fetching data from disk storage into main memory and deciding what data to cache in me ...
... that data remains consistence despite system failures and concurrent transactions proceed without any conflicting. And they are also responsible for allocating of space on disk storage and are also responsible for fetching data from disk storage into main memory and deciding what data to cache in me ...
Slide 1
... Basic Concept of Database: Database is collection of meaningful or designed data which is used for a specific purpose There are three type of database 1.Network database 2.Hierarchical database 3.Relational database Network and Hierarchical database uses a pointer to access the record but in case o ...
... Basic Concept of Database: Database is collection of meaningful or designed data which is used for a specific purpose There are three type of database 1.Network database 2.Hierarchical database 3.Relational database Network and Hierarchical database uses a pointer to access the record but in case o ...
InstantJChem: a flexible chemical database system
... Organize information using a hierarchy (parentchild relationship between entities). ...
... Organize information using a hierarchy (parentchild relationship between entities). ...
HTML forms with PHP and databases
... SELECT statements) into the result array. OCIFetchInto() will overwrite the previous content of result. By default result will contain a zero-based array of all columns that are not NULL. The mode parameter allows you to change the default behaviour. ...
... SELECT statements) into the result array. OCIFetchInto() will overwrite the previous content of result. By default result will contain a zero-based array of all columns that are not NULL. The mode parameter allows you to change the default behaviour. ...
data
... Application programmers – interact with system through DML calls Sophisticated users – form requests in a database query language Specialized users – write specialized database applications that do ...
... Application programmers – interact with system through DML calls Sophisticated users – form requests in a database query language Specialized users – write specialized database applications that do ...
Introduction to Database Systems
... After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
... After a crash, the effects of partially executed transactions are undone using the log. (Thanks to WAL, if log entry wasn’t saved before the crash, corresponding change was not applied to database!) ...
MCLEOD
... • Modeling the firm's data needs is supported by techniques that: • Describe the data • Describe how the data aggregates into tables • Describe how tables relate to each other • Entity-relationship diagrams are used to describe relationships between conceptual collections of data so that their relat ...
... • Modeling the firm's data needs is supported by techniques that: • Describe the data • Describe how the data aggregates into tables • Describe how tables relate to each other • Entity-relationship diagrams are used to describe relationships between conceptual collections of data so that their relat ...
