database systems using oracle by nilesh shah

... $5.00 Trang 2trend in database research towardsmore of the functionality required by an application being supported within the database system itself, giving rise to database systems with more compre-hensive ... mentioned Traditional database management systems (DBMSs) are passive in the sense that commands are executed by the database (e.g., query, update, de-lete) as and when requested by the user or application ... different database states: DB T—the database at the start of the current transaction; DB E—the database when the event took place; DB C—thedatabase when the condition is evalu- ated; and DB A—the database

Ngày tải lên: 23/03/2014, 16:21

... you are using an SPFILE: As oracle on node1 [oracle@node1 oracle]$ export ORACLE_HOME=/opt/oracle/product/11.1/si [oracle@node1 oracle]$ export ORACLE_SID=ERI [oracle@node1 oracle]$ $ORACLE_HOME/bin/sqlplus ... Shut the database down As oracle on node1 [oracle@node1 oracle]$ export ORACLE_HOME=/opt/oracle/product/11.1/si [oracle@node1 oracle]$ export ORACLE_SID=ERI [oracle@node1 oracle]$ $ORACLE_HOME/bin/sqlplus ... Mining options [oracle@node1 oracle]$ export ORACLE_HOME=/opt/oracle/product/11.1/si [oracle@node1 oracle]$ scp $ORACLE_HOME/dbs/initERI.ora node2:/$ORACLE_HOME/dbs/ [oracle@node1 oracle]$ ssh

Ngày tải lên: 30/03/2014, 13:20

... RedundantInformation in Brake-By-Wire Systems Using a Fuzzy Voter REZA HOSEINNEZHAD ALIREZA BAB-HADIASHAR Swinburne University of Technology In safety critical systems such as brake-by-wire, fault tolerance ... being compared and fused by a voter The converted signals denoted by x1, x2, : : : , xn are processed by an agreement evalua-tion block, resulting in n(n¡ 1)=2 metrics denoted by f®i,jj i = 1,:::,n ... in fault tolerant systems with focus on a by-wire braking system We applied our method to fuse the redundant data provided by two force sensors and one displacement sensor in a by-wire brake pedal

Ngày tải lên: 27/09/2018, 09:41

... Trang 1COP 4710: Database SystemsSpring 2004 Introduction to Database Systems – Part 2 BÀI 2, 1/2 ngày School of Electrical Engineering and ... Roles in the Database Environment Trang 4Database Designers• In large db design projects, we can distinguish between two types of designers: logical database designers and physical database designers ... the database This level describes what data is stored in the database and the relationships among the data.• This is the level at which the logical structure of the entire database as seen by

Ngày tải lên: 24/12/2013, 12:16

... object-oriented approach to database design that is emerging as a standard for object-oriented database systems Introduction to Data Modeling (cont.) Trang 8• The database design process can ... in the database, along with the constraints that are known to hold on this data 3 Logical Database Design: A DBMS must be selected to implement the database and to convert the conceptual database ... existing applications expected to be replaced or complemented by the database system Introduction to Data Modeling (cont.) Trang 92 Conceptual Database Design: The information gathered in the requirements

Ngày tải lên: 24/12/2013, 12:16

... COP 4710: Database Systems (Day 5) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Data Modeling – Part 2 BÀI 5, 1 ngày COP 4710: Database Systems Spring 2004 ... combinations of an employee are managed by which manager COP 4710: Database Systems (Day 5) Page 20 Mark Llewellyn... binary employee works-at COP 4710: Database Systems (Day 5) employe d Page ... Diagrams COP 4710: Database Systems. .. manages what tasks • The E-R diagram in the next slide illustrates how aggregation is represented in the E-R model COP 4710: Database Systems (Day 5)

Ngày tải lên: 24/12/2013, 12:16

... Database Management Systems The first commercial database management systems appeared in the late 1960's These systems evolved from file systems, which provide some of item (3) above; file systems ... hour of video consumes about a gigabyte Databases storing images from satellites can involve petabytes (1000 terabytes, or 1015 bytes) of data Handling such large databases required several technological ... very simple queries Following a famous paper written by Ted Codd in 1970,2 database systems changed significantly Codd proposed that database systems should present the user with a view of data

Ngày tải lên: 24/12/2013, 12:17

... use a GROUP BY clause; follo~ving the WHERE clause The It is also possible t o use a GROUP BY clause in a query about several relations k e ~ ~ l - o r d s GROUP BY are followed by a list of ... are now made by -\ attributes of R f) For each PC, double the amount of RAM and add 20 gigabytes t o the ! g) For each laptop made by manufacturer B, add one inch t o the screen size by attaching ... earlier in the book, like the analogous ODL for object-oriented databases length character string of rip to 255 bytes by a single byte for the count of characters pills the Trang 10294 CH.4PTER

Ngày tải lên: 24/12/2013, 12:17

... systems by using transfer functions and the Laplace transform as well as frequency responsetechniques Frequency Response Techniques: A method of analyzing and designing control sys-tems by using ... hydrofoils, surface-effect ships, and high-speed rail systems includ-ing the magnetic levitation systems 1.2.1 Examples of Control Systems Control systems find numerous and widespread applications ... in robotics, space-vehicle systems, aircraft autopilotsand controls, ship and marine control systems, intercontinental missile guidance systems, au-tomatic control systems for hydrofoils, surface-effect

Ngày tải lên: 01/01/2014, 18:43

... been tested on simple mechanical systems, and leads to a conservative envelope of the transfer functions. rad(x) interval radius c Edited by Foxit ReaderCopyright(C) by Foxit Software Company,2005-2008For ... the problem of mechanical systems in which parameters are uncertain and bounded Interval calculation is used to find an envelope of transfer functions for mechanical systems modeled with Finite ... Trang 1Journal of Sound and Vibration (2000) , 000–000Analysis of Mechanical Systems using Interval Computations applied to Finite Elements Methods. Olivier Dessombz, Fabrice Thouverez,

Ngày tải lên: 12/01/2014, 21:45

... in a distributed database is distinct from all other databases in the system and has its own global database name Oracle forms a database’s global database name by prefixing the database’s network ... network issues in an Oracledistributed database system Net8 All Oracle databases in a distributed database system use Oracle’s networkingsoftware, Net8, to facilitate inter-database communication ... implicitly uses a database linkthat connects to the remote SALES database Trang 27Connecting Between Oracle Server VersionsAn Oracle distributed database system can incorporate Oracle databases ofdifferent

Ngày tải lên: 17/01/2014, 09:20

... Trang 1COP 4710: Database SystemsSchool of Electrical Engineering and Computer Science University of Central Florida ... be in 3NF but not in BCNF Trang 8• The basic goal of relational database design should be to ensure that every relation in the database is either in 3NF or BCNF update anomalies to make a significant ... highlighted tuple is added to this instance. is added The fd pilot-name → pilot-id is violated by this insertion A transitive dependency exists since: pilot-id → pilot-name holds and pilot-id

Ngày tải lên: 21/01/2014, 18:20

... COP 4710: Database Systems (Day 12) Page 1 Mark Llewellyn COP 4710: Database Systems Spring 2004 Introduction to Normalization – Part 3 BÀI 12, 1/2 ngày COP 4710: Database Systems Spring ... and dependency preservation properties must be independently tested when using algorithm 3NF.2 COP 4710: Database Systems (Day 12) Page 12 Mark Llewellyn Algorithm #3 for Producing a 3NF ... functional dependency in F is implied by G, then G covers F • The technique is to generate that portion of G + that allows us to know if G covers F COP 4710: Database Systems (Day 12) Page 15 Mark

Ngày tải lên: 21/01/2014, 18:20

... Trang 1COP 4710: Database Systems (Day 17) Page 1 Mark LlewellynCOP 4710: Database Systems Spring 2004 Introduction to SQL BÀI 13, 2 ngày COP 4710: Database Systems Spring 2004 Introduction ... pronounced “S-Q-L” by some and “sequel” by others (mostly old-timers), has become the de facto standard language for creating and querying relational databases • It has been accepted by ANSI (American ... the information in this set of notes Trang 5COP 4710: Database Systems (Day 17) Page 5 Mark LlewellynSQL • SQL is a complete relational database language in the sense that it contains both

Ngày tải lên: 21/01/2014, 18:20

... joined relations. Trang 16Joining Database Tables (cont.)• If you do not specify a join condition in the WHERE clause, a Cartesian product results Using our sample database, the PRODUCT table contains ... output of a relational operator (like SELECT in SQL) is another relations (or table) • Using our sample database as an example, suppose that at the end of each business day, we would like to ... grouped by vendor: CREATE VIEW SUMPRDXVEN AS SELECT V_CODE, SUM(P_ONHAND*P_PRICE) AS TOTCOST, MAX(P_ONHAND) AS MAXQTY, MIN(P_OHAND) AS MINQTY, AVG(P_ONHAND) AS AVGQTY Trang 14Joining Database

Ngày tải lên: 21/01/2014, 18:20

... execution strategies that can be implemented by the DBMS access algorithms and which apply to the particular database in question can be considered by the query optimizer • There are two basic ... Trang 1COP 4710: Database SystemsSchool of Electrical Engineering and Computer Science University of Central Florida ... really familiar by now!!) SPJ Trang 8Query Trees• There are usually several different ways to generate a relational algebra expression for a query This should be quite obvious by now after doing

Ngày tải lên: 21/01/2014, 18:20

... represent objects. Also, modern object-relational database systems allow attributes of pointer type (called references), so even relational systems need the ability to represent pointers in ... server's database address space, which is typically a sequence of eight or so bytes locating the item in the secondary storage of the system. We shall call this address the database address. ... the item by either its database address or its memory address. It is more efficient to put memory addresses wherever an item has a pointer, because these pointers can be followed using single

Ngày tải lên: 21/01/2014, 18:20

... or a kd-tree may be greatly unbalanced I t is quite usual for any database t o be restructured after a while By reloading the database, we have the opportunity to create index structures that, ... bit-vector 010001 is also encoded by 111; bit-vector 010101 is a third vector encoded by 111 Thus, 111 cannot be decoded uniquely into one bit-vector achieved here, by almost a factor of 2, but only ... structure," ACM Trans on Database Systems 9:l (1984), pp 38-71 10 P O'Xeil, "Model 204 architecture and performance," Proc Second Intl Workshop on High Performance Transaction Systems, Springer-Verlag,

Ngày tải lên: 21/01/2014, 18:20

... take the database from a consistent state to an- other consistent state? Explicit constraints are enforced by the database, so any transaction that violates them will be rejected by the system ... record <COMMIT T>, then by undo rule Uz all changes made by transaction T were previously written to disk. Thus, T by itself could not have left the database in an inconsistent state ... a copy of the database Similarly, a nonquiescent dump tries to make a copy of the database that existed when the dump began, but database activity may change many database elements

Ngày tải lên: 21/01/2014, 18:20

... "On concurrency control by multiple versions," ACM Trans on Database Systems 9:l (1984), pp 89- This chapter also incllldes an introduction t o distributed databases IVe focus on ho1v ... Deadlocks that are caused by transactions waiting for locks held by another can be addressed by a waits-for graph, indicating which transactions are waiting for locks held by another transaction ... lock on .-I1 held by T I ; T3 is waiting for a lock on -42 held by T 2 , and so on, while T,, is waiting for a lock on An-1 held by Tn-l, and Tl is xvaiting for a lock on 4, held by T,, Since 2'2

Ngày tải lên: 26/01/2014, 15:20