ppt
... Max depth of the decision tree • How many permutations are there of N numbers? • How many leaves does the tree have? • What’s the shallowest tree with a given number of leaves? • What is therefore the worst running time (number of comparisons) by the best possible sorting algorithm? ...
... Max depth of the decision tree • How many permutations are there of N numbers? • How many leaves does the tree have? • What’s the shallowest tree with a given number of leaves? • What is therefore the worst running time (number of comparisons) by the best possible sorting algorithm? ...
Exam 1
... Fill in the blanks to accurately describe the connection of, and activities at, each level. [8 pts] Entity-relationship modeling is at the ____________ level. Conversion of the ER model to the relational model is found at the ________________ level. Specifying relationships and their cardinality occ ...
... Fill in the blanks to accurately describe the connection of, and activities at, each level. [8 pts] Entity-relationship modeling is at the ____________ level. Conversion of the ER model to the relational model is found at the ________________ level. Specifying relationships and their cardinality occ ...
Many-to-Many Relationships
... • Combined keys necessary when a pair of oneto-many relationships is built into a separate table • Using the AutoNumber field type keeps order • Relationships window shows visual relationships • Enforce referential integrity ...
... • Combined keys necessary when a pair of oneto-many relationships is built into a separate table • Using the AutoNumber field type keeps order • Relationships window shows visual relationships • Enforce referential integrity ...
PHP_Bible
... As when writing code in a programming language, writing code that interacts with a database is an exercise in appropriate division of labor People who write programming languages and databases have agreed to automate, standardize, and optimize certain tasks that come up over and over again in progra ...
... As when writing code in a programming language, writing code that interacts with a database is an exercise in appropriate division of labor People who write programming languages and databases have agreed to automate, standardize, and optimize certain tasks that come up over and over again in progra ...
Architecture Design - People
... could be rewritten to retrieve data from a different database, without affecting any of the business logic. This helped us while developing the application as we have split the layers and worked simultaneously. Data access layer This layer provides simplified access to data stored in persistent stor ...
... could be rewritten to retrieve data from a different database, without affecting any of the business logic. This helped us while developing the application as we have split the layers and worked simultaneously. Data access layer This layer provides simplified access to data stored in persistent stor ...
Database Market – Major Players
... Software that hosts a large number of users in an organization simultaneously. Rather than serve only one user at time, can run a large number of computer software. ...
... Software that hosts a large number of users in an organization simultaneously. Rather than serve only one user at time, can run a large number of computer software. ...
Data warehouse
... physically arranged, stored, and accessed on some type of storage device • Logical view – how you as a knowledge worker need to arrange and access information • With a database, you only concern yourself with your logical view ...
... physically arranged, stored, and accessed on some type of storage device • Logical view – how you as a knowledge worker need to arrange and access information • With a database, you only concern yourself with your logical view ...
Deliver, Manage and Control Optimal Database Performance
... • Backing up during working hours - it's all about disk I/O. It serves the backup or it serves your users. If you have to do it, look at differentials or transaction log backups: they take less time and reduce dropped connections as a result. • Executing updates against live data - you are kidding, ...
... • Backing up during working hours - it's all about disk I/O. It serves the backup or it serves your users. If you have to do it, look at differentials or transaction log backups: they take less time and reduce dropped connections as a result. • Executing updates against live data - you are kidding, ...
Stephen Todd
... even for legacy we can even wrap your old one • eg relational front end to an IMS database "It's easy to put a relational front end on a pure IMS database ...
... even for legacy we can even wrap your old one • eg relational front end to an IMS database "It's easy to put a relational front end on a pure IMS database ...
IMAGE`s coming of age
... With the Internet, the HP3000 has become a powerful web server that can support millions of transactions based on IMAGE databases — on a daily basis and with thousands of concurrent users who can be anywhere in the world. As a result, the HP3000 is known as HP’s Enterprise Database Server for Busine ...
... With the Internet, the HP3000 has become a powerful web server that can support millions of transactions based on IMAGE databases — on a daily basis and with thousands of concurrent users who can be anywhere in the world. As a result, the HP3000 is known as HP’s Enterprise Database Server for Busine ...
Document
... Choose different account names than standard suggestions Restrict use of the account that owns Oracle software Secure temporary directory Some Oracle files are SUID (root) Command line SQL*Plus with user/pass parameters appears under ps output Others… ...
... Choose different account names than standard suggestions Restrict use of the account that owns Oracle software Secure temporary directory Some Oracle files are SUID (root) Command line SQL*Plus with user/pass parameters appears under ps output Others… ...
System Design
... Ensure X-Repository information is ‘secure’ (i.e. biostatisticians can ‘trust’.) ...
... Ensure X-Repository information is ‘secure’ (i.e. biostatisticians can ‘trust’.) ...
Introduction to SQL
... DBMS provides systematic support for the treatment of null values (unknown or inapplicable data), distinct from default values, and independent of any domain. 4. Active, On-Line Relational Catalog. The description of the database and its contents is represented at the logical level as tables, and ...
... DBMS provides systematic support for the treatment of null values (unknown or inapplicable data), distinct from default values, and independent of any domain. 4. Active, On-Line Relational Catalog. The description of the database and its contents is represented at the logical level as tables, and ...
PowerPoint slides for persistence
... 1. Obtain an appropriate data access object and ask it to fetch the required data 2. The DAO would obtain an entity manager and use its functionality to fetch one or more objects from the database 3. Your application can then use the fetched object(s) as it wishes 4. If it changes it, no need to sto ...
... 1. Obtain an appropriate data access object and ask it to fetch the required data 2. The DAO would obtain an entity manager and use its functionality to fetch one or more objects from the database 3. Your application can then use the fetched object(s) as it wishes 4. If it changes it, no need to sto ...
COURSE OUTLINE Prepared By: Tim Davey
... HOURS OF LECTURE, LABORATORY, RECITATION, TUTORIAL, ACTIVITY: 2 lecture hours per week ...
... HOURS OF LECTURE, LABORATORY, RECITATION, TUTORIAL, ACTIVITY: 2 lecture hours per week ...
A Closer Look
... transactions must be the same as if they had executed serially (serializable) in some order. • Serializable has better performance than serial, but performance might still be inadequate. Database systems offer several isolation levels with different performance ...
... transactions must be the same as if they had executed serially (serializable) in some order. • Serializable has better performance than serial, but performance might still be inadequate. Database systems offer several isolation levels with different performance ...
Example: Data Mining for the NBA
... Compared to relational databases, for example, collections could be ...
... Compared to relational databases, for example, collections could be ...
select
... Advanced Applications • Bread-and-butter applications ??? – Banking systems • What happens if you install a stock trading system which should handle >100K transactions/minute • How to derive trading advice using compute intensive applications • How to warn thousands of users about their trading ...
... Advanced Applications • Bread-and-butter applications ??? – Banking systems • What happens if you install a stock trading system which should handle >100K transactions/minute • How to derive trading advice using compute intensive applications • How to warn thousands of users about their trading ...
Introduction to DBMS - Moosehead Web Server
... Schema and physical organization modification Granting user authority to access the database Specifying integrity constraints Acting as liaison with users Monitoring performance and responding to changes in requirements ...
... Schema and physical organization modification Granting user authority to access the database Specifying integrity constraints Acting as liaison with users Monitoring performance and responding to changes in requirements ...
Introduction to DBMS
... Schema and physical organization modification Granting user authority to access the database Specifying integrity constraints Acting as liaison with users Monitoring performance and responding to changes in requirements ...
... Schema and physical organization modification Granting user authority to access the database Specifying integrity constraints Acting as liaison with users Monitoring performance and responding to changes in requirements ...
How to plan a good database
... designed to answer. The best place to start is actually at the end - ask yourself what you’re trying to find out, what your database can tell you and how it will help your work. 1 Budgeting your time Whether it is a member of staff, volunteer or consultant leading the project, the amount of time tak ...
... designed to answer. The best place to start is actually at the end - ask yourself what you’re trying to find out, what your database can tell you and how it will help your work. 1 Budgeting your time Whether it is a member of staff, volunteer or consultant leading the project, the amount of time tak ...
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"".