Slides
... Two kinds of efficient access operations are needed: First, given a value x, it should be possible to perform a GetNextTID operation on lists Cx and Gx in constant time, tuple-ids in the lists should be efficiently retrievable one-byone in order of decreasing score. This corresponds to the sorted st ...
... Two kinds of efficient access operations are needed: First, given a value x, it should be possible to perform a GetNextTID operation on lists Cx and Gx in constant time, tuple-ids in the lists should be efficiently retrievable one-byone in order of decreasing score. This corresponds to the sorted st ...
DATABASE MANAGEMENT SYSTEMS
... database administrator. The constraints available in SQL are Foreign Key, Not Null, Unique, Check. Constraints can be defined in two ways 1) The constraints can be specified immediately after the column definition. This is called column-level definition. 2) The constraints can be specified after all ...
... database administrator. The constraints available in SQL are Foreign Key, Not Null, Unique, Check. Constraints can be defined in two ways 1) The constraints can be specified immediately after the column definition. This is called column-level definition. 2) The constraints can be specified after all ...
Practice 3: Managing an Oracle Instance - MCST-CS
... 9 Enable timing in trace files dynamically and verify it. Hint: Use the ALTER SYSTEM command to enable timing in trace files dynamically and use the dynamic performance view V$PARAMETER to verify the result. 10 Connect as user SCOTT and insert rows in the table EMP. Open second session and try to sh ...
... 9 Enable timing in trace files dynamically and verify it. Hint: Use the ALTER SYSTEM command to enable timing in trace files dynamically and use the dynamic performance view V$PARAMETER to verify the result. 10 Connect as user SCOTT and insert rows in the table EMP. Open second session and try to sh ...
slides - CIS @ Temple University
... CallableStatement cStmt2 = conn.prepareCall("{call some procedure(?,?)}"); ...
... CallableStatement cStmt2 = conn.prepareCall("{call some procedure(?,?)}"); ...
Chapter 12 - Distributed Database Management Systems
... not be committed, all changes made at the other sites will be undone – Final COMMIT is issued after all sites have committed their parts of transaction – Requires that each DP’s transaction log entry be written before database fragment updated ...
... not be committed, all changes made at the other sites will be undone – Final COMMIT is issued after all sites have committed their parts of transaction – Requires that each DP’s transaction log entry be written before database fragment updated ...
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 ...
Click to Unit 4 of DDB
... through before it gets to the testing stage. Furthermore, most commercial software goes through extensive alpha and beta testing before being released for field use. ...
... through before it gets to the testing stage. Furthermore, most commercial software goes through extensive alpha and beta testing before being released for field use. ...
week11 - Arms-A
... To make a connection to database in J2EE : 1. Should not hardcode the actual name (URL) of the database in EJB 2. Should refer to the database with a logical name 3. Use a JNDI lookup when obtaining the database ...
... To make a connection to database in J2EE : 1. Should not hardcode the actual name (URL) of the database in EJB 2. Should refer to the database with a logical name 3. Use a JNDI lookup when obtaining the database ...
MIS 2502 Access 2007 Tutorial
... Every record in a table must have a primary key that differentiates it from every other record in the table. In some cases, it is only necessary to designate an existing field as the primary key if you are certain that every record in the table will have a different value for that particular field. ...
... Every record in a table must have a primary key that differentiates it from every other record in the table. In some cases, it is only necessary to designate an existing field as the primary key if you are certain that every record in the table will have a different value for that particular field. ...
Techwave_2005_am18a_ASAInternals
... Don’t ignore index maintenance costs when considering page size (larger page sizes can mean increased cache pressure) Test your application with different alternatives Your mileage may vary A 4K page size is a typical choice for many applications My recommendation: use 4K pages unless thor ...
... Don’t ignore index maintenance costs when considering page size (larger page sizes can mean increased cache pressure) Test your application with different alternatives Your mileage may vary A 4K page size is a typical choice for many applications My recommendation: use 4K pages unless thor ...
Slide 1
... • These operations are the only ones you need to create new tables from other database tables – Join is an especially useful operation that associates information from separate tables in new ways, based on matching fields ...
... • These operations are the only ones you need to create new tables from other database tables – Join is an especially useful operation that associates information from separate tables in new ways, based on matching fields ...
Advanced Database Management Systems
... database is known as a database management system (DBMS). The term "database" originated within the computing discipline. Although its meaning has been broadened by popular use, even to include non-electronic databases, this article is about computer databases. Database-like records have been in exi ...
... database is known as a database management system (DBMS). The term "database" originated within the computing discipline. Although its meaning has been broadened by popular use, even to include non-electronic databases, this article is about computer databases. Database-like records have been in exi ...
Introduction - Pathway Tools Software
... PGDBs created by all users who use this ptools installation PGDBs downloaded via the registry ptools-init.dat for this ptools installation ...
... PGDBs created by all users who use this ptools installation PGDBs downloaded via the registry ptools-init.dat for this ptools installation ...
Chapter 22 Distributed DBMSs - Concepts and Design Transparencies
... Sites may run different DBMS products, with possibly different underlying data models. Occurs when sites have implemented their own databases and integration is considered later. Translations required to allow for: 1. Different hardware. 2. Different DBMS products. 3. Different hardware and di ...
... Sites may run different DBMS products, with possibly different underlying data models. Occurs when sites have implemented their own databases and integration is considered later. Translations required to allow for: 1. Different hardware. 2. Different DBMS products. 3. Different hardware and di ...
10 Software Architecture Failures
... I pretty much have to be rocket a scientist to manage my DBs I am paranoid about security and lock my database down real tight Developers sometimes driver me crazy with their unoptimized code ...
... I pretty much have to be rocket a scientist to manage my DBs I am paranoid about security and lock my database down real tight Developers sometimes driver me crazy with their unoptimized code ...
CST/PTS Student Conduct Guidelines
... Your receipt of this outline and your attendance in this course signifies that you have been made aware of these official BCIT policies which are detailed on the BCIT web site and referred to on the last page of this outline. Assignments: Late assignments, lab reports or projects will not be accepte ...
... Your receipt of this outline and your attendance in this course signifies that you have been made aware of these official BCIT policies which are detailed on the BCIT web site and referred to on the last page of this outline. Assignments: Late assignments, lab reports or projects will not be accepte ...
Query Optimization – Seminar 1
... Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is sorted in R.a order. For each of the following relational algebra expressions (i.e. queries), state which of the following three approaches (evaluation strategies) is most likely to be the cheap ...
... Assume that R.a is a candidate key for R, with values lying in the range of 0 to 4,999,999, and that R is sorted in R.a order. For each of the following relational algebra expressions (i.e. queries), state which of the following three approaches (evaluation strategies) is most likely to be the cheap ...
Introduction to Database Systems
... – The first time Next() is applied, it gets the first tuple. – If there are no more tuples, Next() returns the value FALSE. ...
... – The first time Next() is applied, it gets the first tuple. – If there are no more tuples, Next() returns the value FALSE. ...
Introduction to SQL
... Base Table–table containing the raw data Dynamic View A “virtual table” created dynamically upon request by a user No data actually stored; instead data from base table made available to user Based on SQL SELECT statement on base tables or other views Materialized View Copy or replicat ...
... Base Table–table containing the raw data Dynamic View A “virtual table” created dynamically upon request by a user No data actually stored; instead data from base table made available to user Based on SQL SELECT statement on base tables or other views Materialized View Copy or replicat ...
DBA625 Covered so far
... 1. ALTER DATABASE DROP LOGFILE {GROUP n | MEMBER 'path'}and then 2. OS removal with rm command Undo Data is a COPY of original, pre-modified data (by DML statements) captured for EVERY transaction It supports 4 different things: 1) ROLLBACK (Undo) operations by developers and users 2) Read Consisten ...
... 1. ALTER DATABASE DROP LOGFILE {GROUP n | MEMBER 'path'}and then 2. OS removal with rm command Undo Data is a COPY of original, pre-modified data (by DML statements) captured for EVERY transaction It supports 4 different things: 1) ROLLBACK (Undo) operations by developers and users 2) Read Consisten ...
Controlling User Layer’s Privilege Automatically in Information
... called application layer, to control its privilege can be implemented by some gateways and logical control. Some gateways include database’s gateway and network’s gateway (for example, some software firewall), and logical control may be achieved by application middleware or by user’s programs in mid ...
... called application layer, to control its privilege can be implemented by some gateways and logical control. Some gateways include database’s gateway and network’s gateway (for example, some software firewall), and logical control may be achieved by application middleware or by user’s programs in mid ...
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"".