Data Exploration
... A scatterplot plotting % persons 18 years old in 2000 against % population change, 1990–2000. A weak positive relationship, with a correlation coefficient of 0.376, is present between the two variables. ...
... A scatterplot plotting % persons 18 years old in 2000 against % population change, 1990–2000. A weak positive relationship, with a correlation coefficient of 0.376, is present between the two variables. ...
Storing Data: Disks and Files
... – Pages with free space identified using linked list or directory structure (similar to how pages in file are kept track of). ...
... – Pages with free space identified using linked list or directory structure (similar to how pages in file are kept track of). ...
Introduction to Database Systems
... Data independence by representing the data in high-level abstract---you just know what you are permitted Efficient access via database indexing---very fast Reduced application development time without changing the data---easy for package design and add Data integrity (constraints) and security—easy ...
... Data independence by representing the data in high-level abstract---you just know what you are permitted Efficient access via database indexing---very fast Reduced application development time without changing the data---easy for package design and add Data integrity (constraints) and security—easy ...
What are the Database Editions?
... VERITAS QuickLog • Improves VERITAS File System Write performance by exporting intent log • Updates intent log in parallel with accessing file data • Eliminates the seek time between intent log area and file system data area • Transparent to end users • Minimal system administration setup ...
... VERITAS QuickLog • Improves VERITAS File System Write performance by exporting intent log • Updates intent log in parallel with accessing file data • Eliminates the seek time between intent log area and file system data area • Transparent to end users • Minimal system administration setup ...
BA271 Week 1 Lecture
... You can create a query that will display only selected fields from a table instead of displaying all fields. In the Simple Query Wizard dialog box, select which fields you want included in the query. – Move all the fields into the Selected Fields box – Move the fields one at a time – Remove fields o ...
... You can create a query that will display only selected fields from a table instead of displaying all fields. In the Simple Query Wizard dialog box, select which fields you want included in the query. – Move all the fields into the Selected Fields box – Move the fields one at a time – Remove fields o ...
- Courses - University of California, Berkeley
... • Physical backup methods are faster than logical because they involve only file copying without conversion. • Output is more compact than for logical backup. • Backup and restore granularity ranges from the level of the entire data directory down to the level of individual files. • In addition to d ...
... • Physical backup methods are faster than logical because they involve only file copying without conversion. • Output is more compact than for logical backup. • Backup and restore granularity ranges from the level of the entire data directory down to the level of individual files. • In addition to d ...
Speaker Kick Off Meeing
... Recommendations De-normalize in some cases Normalization can affect performance ...
... Recommendations De-normalize in some cases Normalization can affect performance ...
Create All Those Tables and Call PROC SQL Once!
... When creating extracts for clinical trial reporting, it is often the case that more than one dataset is created at a time. There is a great deal of overhead involved in calling or exiting PROC SQL (or many other SAS procedures, for that matter). The following presents a methodology for creating mult ...
... When creating extracts for clinical trial reporting, it is often the case that more than one dataset is created at a time. There is a great deal of overhead involved in calling or exiting PROC SQL (or many other SAS procedures, for that matter). The following presents a methodology for creating mult ...
ALTERNATE SCHEMA DIAGRAMMING METHODS DECISION
... result in a huge, sparse fact table that is very slow to query ...
... result in a huge, sparse fact table that is very slow to query ...
Intelligent Querying Techniques for Sensor Data Fusion
... Allows user to specify queries for both Multimedia data sources and Multimedia databases Supports multiple sensor sources and systematic modification of queries ...
... Allows user to specify queries for both Multimedia data sources and Multimedia databases Supports multiple sensor sources and systematic modification of queries ...
Ring Charts
... have too much, with the useful, interesting, and irrelevant all thrown in together. The ability to measure every conceivable aspect of complex systems has brought a greater need to identify the things that really matter. Ring Charts are an outgrowth of Chaos Theory. This area of mathematics examines ...
... have too much, with the useful, interesting, and irrelevant all thrown in together. The ability to measure every conceivable aspect of complex systems has brought a greater need to identify the things that really matter. Ring Charts are an outgrowth of Chaos Theory. This area of mathematics examines ...
SQL Server 2005 Overview - MD ColdFusion User`s Group
... unmapped •As pages are needed, they can be mapped into the virtual address space •Some structure stay in virtual address memory including plan cache, cursor structures and user connection context •Cost associated with mapping / unmapping ...
... unmapped •As pages are needed, they can be mapped into the virtual address space •Some structure stay in virtual address memory including plan cache, cursor structures and user connection context •Cost associated with mapping / unmapping ...
بسم الله الرحمن الرحيم
... complete definition or description of the database structure and constraints. This definition is stored in the system catalog, which contains information such as the structure of each file, the type and storage format of each data item, and various constraints on the data. This information stored in ...
... complete definition or description of the database structure and constraints. This definition is stored in the system catalog, which contains information such as the structure of each file, the type and storage format of each data item, and various constraints on the data. This information stored in ...
Future testplan - hep-proj-database Site
... Which Oracle data types are of central importance for physics data models? NUMBER ...
... Which Oracle data types are of central importance for physics data models? NUMBER ...
Data Modeling - Temple Fox MIS
... • The only required field is CustomerID – the rest can be left blank. • CustomerID is defined as the primary key. ...
... • The only required field is CustomerID – the rest can be left blank. • CustomerID is defined as the primary key. ...
Data Resource Management
... businesses and operations Also called subject area databases (SADB), transaction databases, and production databases Database examples: customer, human resource, inventory ...
... businesses and operations Also called subject area databases (SADB), transaction databases, and production databases Database examples: customer, human resource, inventory ...
ISY 4340 Class Introduction
... Database Administration: A technical function that is responsible for physical database design and for dealing with technical issues such as security enforcement, database performance, and backup and ...
... Database Administration: A technical function that is responsible for physical database design and for dealing with technical issues such as security enforcement, database performance, and backup and ...
lesson5.4 - Sbyte Technologies
... • E.g., split account into two, (account-number, branch-name) and (account-number, balance). • Branch-name need not be fetched unless required Improve performance by storing a denormalized relation • E.g., store join of account and depositor; branch-name and balance information is repeated for eac ...
... • E.g., split account into two, (account-number, branch-name) and (account-number, balance). • Branch-name need not be fetched unless required Improve performance by storing a denormalized relation • E.g., store join of account and depositor; branch-name and balance information is repeated for eac ...
Introduction to Database Systems
... Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later requests a lock on Y? (Deadlock!) ...
... Idea: If an action of Ti (say, writing X) affects Tj (which perhaps reads X), one of them, say Ti, will obtain the lock on X first and Tj is forced to wait until Ti completes; this effectively orders the transactions. What if Tj already has a lock on Y and Ti later requests a lock on Y? (Deadlock!) ...
Bild 1
... • Main query information is; target database information and an SQL statement. Having a SQL statement is having a fully functional report. Then query formatting parameters can be defined to get a graph, sub-totals, cube etc. • Very easy to change or add a new report. ...
... • Main query information is; target database information and an SQL statement. Having a SQL statement is having a fully functional report. Then query formatting parameters can be defined to get a graph, sub-totals, cube etc. • Very easy to change or add a new report. ...
Data Collection Database options and Data
... Queries, and the reports based on those queries, are easier to write and run In a database, data is stored separately to the application. If the application crashes it will affect all the data in the spreadsheet Data recovery is more efficient Data is secure and centrally located ...
... Queries, and the reports based on those queries, are easier to write and run In a database, data is stored separately to the application. If the application crashes it will affect all the data in the spreadsheet Data recovery is more efficient Data is secure and centrally located ...
slides
... a search for David Livingstone will use the first part of the index to find all the Livingstones in the table then the second part to find the Davids among them ...
... a search for David Livingstone will use the first part of the index to find all the Livingstones in the table then the second part to find the Davids among them ...
NewSQL Databases The reference Big Data stack
... VoltDB and concurrency control • Alternative design based on two assumptions – Assumption 1: total available memory is large enough to store the entire data store – Assumption 2: all user transactions are short-lived and can be very efficiently executed over inmemory data ...
... VoltDB and concurrency control • Alternative design based on two assumptions – Assumption 1: total available memory is large enough to store the entire data store – Assumption 2: all user transactions are short-lived and can be very efficiently executed over inmemory data ...