• Study Resource
  • Explore
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Advanced SQL
Advanced SQL

... Permits definition of procedures in SQL, with if-then-else statements, for and while loops, etc. ...
Introducing Enterprise NoSQL
Introducing Enterprise NoSQL

... Use ACID transactions to ensure you don’t run the risk of encountering data corruption, stale reads, and inconsistent data—all of which are unacceptable. ...
12. User-managed complete recovery and RMAN complete recovery
12. User-managed complete recovery and RMAN complete recovery

Database as Model - UMD Department of Computer Science
Database as Model - UMD Department of Computer Science

... • Each entry (row) in the table corresponds to a single instance (member in that set) • For an Entity Set each column in the table represents an attribute in the E-R diagram • For a Relationship Set each column in the table represents either an attribute of the Relationship or one of the parts of th ...
cos 346 day 11& 12
cos 346 day 11& 12

...  Require quotes around values for Char and VarChar columns, but no quotes for Integer and Numeric columns  AND may be used for compound conditions  IN and NOT IN indicate ‘match any’ and ‘match all’ sets of values, respectively  Wildcards _ and % can be used with LIKE to specify a single or mult ...
Chapter 7: Relational Database Design
Chapter 7: Relational Database Design

... instead, pass tuples directly to the join. Similarly, don’t store result of join, pass tuples directly to projection. Much cheaper than materialization: no need to store a temporary relation to disk. Pipelining may not always be possible – e.g., sort, hash-join. For pipelining to be effective, use e ...
Slides for Ch-13
Slides for Ch-13

...  Pipelining may not always be possible – e.g., sort, hash-join.  For pipelining to be effective, use evaluation algorithms that generate ...
A Discussion of Some Intuitions of Defeasible Reasoning
A Discussion of Some Intuitions of Defeasible Reasoning

... creation of URI references from cells predicates may be chosen from a vocabulary datatypes may be assigned ...
Using Data Guard for Hardware migration - 4 - Indico
Using Data Guard for Hardware migration - 4 - Indico

... • Hardware specifications progress very fast ...
SQL and Java
SQL and Java

... • We need to deal with it as best we can • Make sure any database objects are closed • If a connection is left open it can consume resources and might interfere with later use of the database ...
HMDB: the Human Metabolome Database
HMDB: the Human Metabolome Database

... (>1 mM) in the human body. In addition to experimentally identifying and quantifying hundreds of metabolites in different body fluids, this multi-year project was also formally tasked with backfilling and validating the information on all previously identified metabolites and providing this informat ...
Using SAS Views and SQL Views
Using SAS Views and SQL Views

... and we needed eight character names for fields and tables before Version 7. So, we developed SAS names for the fields, grouped in ways that make analysis easier. We, then, created views with eight character names in DB2 that renamed and regrouped the fields. These views don't take up storage space, ...
SQL and Java In this Lecture SQL and Other Languages JDBC
SQL and Java In this Lecture SQL and Other Languages JDBC

... • Things can go wrong with all of this • Incorrect SQL statements • DBMS might not be available • DBMS might not support some features ...
Kroenke-Auer-DBP-e11-PPT
Kroenke-Auer-DBP-e11-PPT

... backups. • To recover a database with SQL Server: – The database is restored from a prior database backup. – Log after images are applied to the restored database. – At the end of the log, changes from any transaction that failed to commit are then rolled back. ...
D2RQ
D2RQ

... Resources and 303 redirects Asking for a raw resource doesn’t make sense – it’s just an identifier  But we can specify in the HTTP header what kind of content we want, e.g. HTML or RDF  If client gets a 303 (redirect) it knows where to go  For example: ...
Fudcon talk
Fudcon talk

... • New Storage Engine • Substantially reduces storage requirements >50% • Information is stored packed via gzip, unzipped on the fly ...
The Semantic Integration of Information Models
The Semantic Integration of Information Models

Aptitude Questions 1. One guy has Rs. 100/
Aptitude Questions 1. One guy has Rs. 100/

... 4. When I add 4 times my age 4 years from now to 5 times my age 5 years from now, I get 10 times my current age. How old will I be 3 years from now? 5. A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, "How many gold coins do we have? ...
Triggers
Triggers

... e.g. C/C++ in Poet, Java in Oracle, VB in MS Access ...
Romancing Your Data: The Getting-to-Know-You Phase
Romancing Your Data: The Getting-to-Know-You Phase

... The code presented in this section has two parts for initial exploration of the SYS Views. The first part creates a listing of view names within the SYS schema coming from any of the three SYS View families ALL_, USER_, DBA_. As mentioned previously, the most useful metadata for an analyst are in a ...
Understanding CopyStorm/Restore
Understanding CopyStorm/Restore

... Here is the key point: The Tracker Database retains the history/progress of a restore across each use of a CopyStorm/Restore configuration file. The means: If you use a Tracker Database to restore records to “Sandbox A” then attempt to restore “Sandbox B”, no records will be written to “Sandbox B” ...
TE Computer - University of Pune
TE Computer - University of Pune

... and DT frequencies, Aliasing, Sampling Theorem, A to D conversion Process: Sampling, quantization and encoding. (09 Hrs) Unit II: Frequency Domain Representation of Signal Introduction to Fourier Series, Representation of DT signal by Fourier Transform (FT), Properties of FT: Linearity, periodicity, ...
focus on: fdr/upstream`s online database solutions
focus on: fdr/upstream`s online database solutions

... (can’t be run or returns a non-zero return code), the UPSTREAM function will not be performed, and the entire function will return a non-zero return code on the host. When the backup is completed the post-processing facility could then be automatically executed. The result is a totally automated met ...
batabase
batabase

Question 3: How is the concept of functional
Question 3: How is the concept of functional

... forms that represent “good” database design, and as we know process of putting a database design into normal forms is nothing but normalization. www.geocities.com/ignoumcahelp - Thus, Functional dependency is a central concept of the normalization process. - In other words, the process of normalizat ...
< 1 ... 101 102 103 104 105 106 107 108 109 ... 459 >

Concurrency control

In information technology and computer science, especially in the fields of computer programming, operating systems, multiprocessors, and databases, concurrency control ensures that correct results for concurrent operations are generated, while getting those results as quickly as possible.Computer systems, both software and hardware, consist of modules, or components. Each component is designed to operate correctly, i.e., to obey or to meet certain consistency rules. When components that operate concurrently interact by messaging or by sharing accessed data (in memory or storage), a certain component's consistency may be violated by another component. The general area of concurrency control provides rules, methods, design methodologies, and theories to maintain the consistency of components operating concurrently while interacting, and thus the consistency and correctness of the whole system. Introducing concurrency control into a system means applying operation constraints which typically result in some performance reduction. Operation consistency and correctness should be achieved with as good as possible efficiency, without reducing performance below reasonable levels. Concurrency control can require significant additional complexity and overhead in a concurrent algorithm compared to the simpler sequential algorithm.For example, a failure in concurrency control can result in data corruption from torn read or write operations.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report