notes - Course Website Directory
... T/F Questions on SQL Constraints 1. If we declare that an attribute A is UNIQUE, we cannot have two tuples where the attribute A has a NULL value. 2. Insertion in SQL supports the bag semantics. 3. There is no way to define a primary key containing multiple attributes in SQL. 4. If we execute an UP ...
... T/F Questions on SQL Constraints 1. If we declare that an attribute A is UNIQUE, we cannot have two tuples where the attribute A has a NULL value. 2. Insertion in SQL supports the bag semantics. 3. There is no way to define a primary key containing multiple attributes in SQL. 4. If we execute an UP ...
Chapter 6
... must themselves be deleted (cascading deletions are possible). Database System Concepts ...
... must themselves be deleted (cascading deletions are possible). Database System Concepts ...
ConcurrencyControl
... No conflict: transactions can execute at the same time Upon first conflict: the second transaction has to wait until the first transaction commits/aborts Locks: Two types, because two read operations do not conflict Basics of locking: Each transaction Ti must obtain a S (shared) lock on object bef ...
... No conflict: transactions can execute at the same time Upon first conflict: the second transaction has to wait until the first transaction commits/aborts Locks: Two types, because two read operations do not conflict Basics of locking: Each transaction Ti must obtain a S (shared) lock on object bef ...
Database Management Systems Course Content Example for
... R-Tree Construction – Insertion Strategies ...
... R-Tree Construction – Insertion Strategies ...
adam_resume
... Oracle Database Administrator for Sprint, Kansas City MO Responsible for multiple production Oracle Parallel Server databases, as well as six test / development OPS databases. (IBM SP, AIX 4.x) Database sizes range from 400 Gigabytes to 2.1 Terabytes. RDBMS versions have varied from 7.3.3.6 to 8.1 ...
... Oracle Database Administrator for Sprint, Kansas City MO Responsible for multiple production Oracle Parallel Server databases, as well as six test / development OPS databases. (IBM SP, AIX 4.x) Database sizes range from 400 Gigabytes to 2.1 Terabytes. RDBMS versions have varied from 7.3.3.6 to 8.1 ...
PYTHIA-II: A Knowledge/Database System for Managing
... Complex scientific, engineering, or societal problems are often solved today by utilizing libraries or some form of problem-solving environments (PSEs). Most software modules are characterized by a significant number of parameters affecting efficiency and applicability that must be specified by the ...
... Complex scientific, engineering, or societal problems are often solved today by utilizing libraries or some form of problem-solving environments (PSEs). Most software modules are characterized by a significant number of parameters affecting efficiency and applicability that must be specified by the ...
Chapter 9
... – Use DDL to create any specified user views. – Use 3GL or 4GL to create the application programs. This will include the database transactions implemented using the DML, possibly embedded in a host programming language. ...
... – Use DDL to create any specified user views. – Use 3GL or 4GL to create the application programs. This will include the database transactions implemented using the DML, possibly embedded in a host programming language. ...
Grammar-like Functional Rules for Representing Query Optimization
... STARs, and so on top down uotti a STAR IS defined totally IO terms of “temnoals”, I e LOLEPOPs operatmg oo constants Each reference of a STAR ts evaluated by replactog the reference wtth its altemattve defmtttons that sattsfy the coodtt~ooof appbcabthty, and replacmg the parametersof those defmttron ...
... STARs, and so on top down uotti a STAR IS defined totally IO terms of “temnoals”, I e LOLEPOPs operatmg oo constants Each reference of a STAR ts evaluated by replactog the reference wtth its altemattve defmtttons that sattsfy the coodtt~ooof appbcabthty, and replacmg the parametersof those defmttron ...
Tutorial on basic MIST SQL language use
... Note: We have started to break up the lines of the SQL into rows, this makes the SQL easier to read. Also, note that 'Gaur' and 'Tracks' are in single quotes and are not fully capitalized, only the first character. This is because only the first characters in the database as data are capitalized. An ...
... Note: We have started to break up the lines of the SQL into rows, this makes the SQL easier to read. Also, note that 'Gaur' and 'Tracks' are in single quotes and are not fully capitalized, only the first character. This is because only the first characters in the database as data are capitalized. An ...
How to Back Up and Restore a Dynamics NAV 2015 Database
... Optional Setup: In NAV, you can use the Company Information page's System Indicator Style field to change the color of the system indicator bar displayed at the top right of all NAV pages. I use this to make it easy for users to differentiate their production and testing databases. When the System I ...
... Optional Setup: In NAV, you can use the Company Information page's System Indicator Style field to change the color of the system indicator bar displayed at the top right of all NAV pages. I use this to make it easy for users to differentiate their production and testing databases. When the System I ...
formerly Compaq NonStop™ ISG Navigator
... The media often talk about today’s tidal waves of business information— massive and, by implication, overwhelming. What this compelling image doesn’t convey is that “massive” is not necessarily the problem. The diversity of today’s data—pouring in from the Internet, created by different software to ...
... The media often talk about today’s tidal waves of business information— massive and, by implication, overwhelming. What this compelling image doesn’t convey is that “massive” is not necessarily the problem. The diversity of today’s data—pouring in from the Internet, created by different software to ...
“Candidate” Query
... Update statement updates all tuples Each update statement fires triggers which inserts an additional 100,000 tuples in backlog Evaluate impact of multiple versions on performance ...
... Update statement updates all tuples Each update statement fires triggers which inserts an additional 100,000 tuples in backlog Evaluate impact of multiple versions on performance ...
The Researcher`s Guide to the Data Deluge
... schema, and control the amount of output being generated. Once a query is submitted, the system will blindly obey the user’s orders and do its utmost best to provide a complete and correct answer as quickly as possible. It returns anything from an empty set to the complete database. Exploration spee ...
... schema, and control the amount of output being generated. Once a query is submitted, the system will blindly obey the user’s orders and do its utmost best to provide a complete and correct answer as quickly as possible. It returns anything from an empty set to the complete database. Exploration spee ...
Library Cache Hit Ratios
... This is a measure of the proportion of data sorts which occur within memory rather than on disk. Sorts on disk make use of the user's tempoary table space. The maximum size of sort which will occur in memory is defined by the sort area size, which is the size within the PGA which will be used. Each ...
... This is a measure of the proportion of data sorts which occur within memory rather than on disk. Sorts on disk make use of the user's tempoary table space. The maximum size of sort which will occur in memory is defined by the sort area size, which is the size within the PGA which will be used. Each ...
DEVELOPMENT OF A GEOTHERMAL DATABASE
... were put together in a table. Grouping of information to construct a table is not as easy as it sounds. A good understanding of geothermal operations and computer programming concept is necessary. The tables were named according to how they best described their contents. The tables were created, fie ...
... were put together in a table. Grouping of information to construct a table is not as easy as it sounds. A good understanding of geothermal operations and computer programming concept is necessary. The tables were named according to how they best described their contents. The tables were created, fie ...
viva voce questions
... Ans.A deadlock is a situation that can occur in multi-user systems that prevents some transactions from continuing work. A deadlock can occur when two or more users are waiting for data locked by each other. 56. What is two phase commit? Ans.Prepare phase and commit phase. The prepare/commit mechani ...
... Ans.A deadlock is a situation that can occur in multi-user systems that prevents some transactions from continuing work. A deadlock can occur when two or more users are waiting for data locked by each other. 56. What is two phase commit? Ans.Prepare phase and commit phase. The prepare/commit mechani ...
Oracle10g Changes in Initialization and Data Dictionary
... 10g initialization parameters In 10g, the init parameters are broken into: – “BASIC”, with 29 parameters that should be modified for tuning – “ADVANCED” for the fine-tuning of databases and to keep us all employed. This is a nice reduction in the number of parameters. For example, shared server env ...
... 10g initialization parameters In 10g, the init parameters are broken into: – “BASIC”, with 29 parameters that should be modified for tuning – “ADVANCED” for the fine-tuning of databases and to keep us all employed. This is a nice reduction in the number of parameters. For example, shared server env ...
NetIntel: A Database for Manipulation of Rich Social Network Data
... has operated on a notion of a dataset - a clearly delimited and pruned set of observations that have been encoded and parameterized using a particular set of assumptions or policies. In such a dataset the entities are represented as nodes, and the relations between them as edges or links. The datase ...
... has operated on a notion of a dataset - a clearly delimited and pruned set of observations that have been encoded and parameterized using a particular set of assumptions or policies. In such a dataset the entities are represented as nodes, and the relations between them as edges or links. The datase ...
Two Commodity Scaleable Servers:a Billion Transactions
... fault-tolerant nodes with our Wolfpack clustering technology as a scaleout project. Microsoft, working closely with Intel and Compaq, built a 45-node cluster capable of running more than a billion transactions per day using Microsoft Transaction server (MTS) and a 2.4 terabyte Microsoft SQL Server d ...
... fault-tolerant nodes with our Wolfpack clustering technology as a scaleout project. Microsoft, working closely with Intel and Compaq, built a 45-node cluster capable of running more than a billion transactions per day using Microsoft Transaction server (MTS) and a 2.4 terabyte Microsoft SQL Server d ...
Introduction to Database System
... An attribute (or set of attributes) X of a relation R2 is a foreign key if it is the primary key of some other relation R1 in the same database. – For all time, each current value of X in the relation R2 must be a current value of X in the relation R1. – R2 is called referencing relation – R1 is cal ...
... An attribute (or set of attributes) X of a relation R2 is a foreign key if it is the primary key of some other relation R1 in the same database. – For all time, each current value of X in the relation R2 must be a current value of X in the relation R1. – R2 is called referencing relation – R1 is cal ...