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1.4 - Introduction to SQL and database objects
1.4 - Introduction to SQL and database objects

...  Alternate name for a table or view  A synonym is also known as an alias  Synonyms can be private or public • Private synonyms have a schema_name as other db objects CREATE SYNONYM empinfo FOR employees ...
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... algorithms. The initial algorithms will include, incremental probability, residence time ratio, aerosolweighed residence time, trajectory clustering, followed by emerging new algorithms. Some schemes will be implemented in multi-receptor mode. ...
Estimating Statistical Aggregates on Probabilistic Data Streams
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... extent but typically gives poor approximations to small quantities. This is the case for DISTINCT and we need to develop an alternative strategy for when DISTINCT is small. For MEDIAN, we show that it is possible to deterministically instantiate a single deterministic stream and run standard stream ...
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A Rough Guide to RAC

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Optimistic Concurrency Control in a Distributed NameNode
Optimistic Concurrency Control in a Distributed NameNode

... serialize the operations and maintain the semantics. This becomes a big problem since the network latency between NameNode and database is far more larger than it was when operated in-memory in original HDFS. Hence, each operation will take a long time lock on the name system. The throughput heavily ...
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... Employee data – tables containing employee details Tools data – PeopleTools tables Prompt table data – non-employee detail tables Long raw – special handling for tables with this column type Large payroll tables - tables containing emplid column and substantial amounts of historical data. TI determi ...
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... No need to predict with 100% accuracy the future data needs. Broadcast based on probability of access. Periodic broadcasting of all data. ...
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Distributed Systems - Distributed Transactions
Distributed Systems - Distributed Transactions

... • Operations can be carried out through RPC and RMI as well as through various local mechanisms on the individual participants ...
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... Analysis Services connection for access. For example, if you named the virtual server VSQLSSASCL1 and the instance name was TK70445, then your server reference in any connection string would be: VSQLSSASCL1\TK70445 In other words, the server name you enter here will fail over with the service, and a ...
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... physical resources to provide the illusion of infinite resources in an environment that may be characterized by highly variable demand. This document will provide an overview of capacity planning for the IBM Cloud Orchestrator (ICO) Version 2.4. In addition, it will offer management best practices t ...
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... The limitations of this using this architecture outside the sphere of a LAN with under 100 clients becomes apparent on inspection. Despite the server usually being the more powerful machine, the bulk of the processing work is made the responsibility of the smaller client – this results in poor perfo ...
Calvin: Fast Distributed Transactions for Partitioned Database Systems
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... is that two-phase commit requires multiple network round-trips between all participating machines, and therefore the time required to run the protocol can often be considerably greater than the time required to execute all local transaction logic. If a few popularlyaccessed records are frequently in ...
Upgrade Oracle Database from 9.2.0.6 to 10g
Upgrade Oracle Database from 9.2.0.6 to 10g

... could not establish the connection Could not Connect to the Database with the above parameters, Please answer the Questions below Solution – check whether 10g listener is up or not -- In the second attempt I got a different error Starting context file generation for db tier.. Using JVM from /d01/ora ...
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... object models, XML and RDF. They are fundamental in many classical areas of data management, including data modeling, database design, indexing, transaction processing, query optimization. Knowledge about keys enables us to i) uniquely reference entities across data repositories, ii) minimize data r ...
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... reliability, and functionality of the Engagement application. This deployment guideline will help ensure the highest possible level of reliability, sustainability, performance, predictability, and end-user usability. The target audiences for Engagement deployment are the firm administrators and mana ...
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... Access comes from its ability to quickly find and bring together information stored in separate tables. In order for Microsoft Access to work most efficiently, each table in your database should include a field or set of fields that uniquely identifies each individual record stored in the table. Thi ...
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TOp SQL SeRveR BaCkUp MISTakeS aND HOw TO avOID THeM

... be wasting time by backing up these databases you don’t need. You should take a look at your backup routines and not bother backing up databases that you do not need. Backing up Read Only databases Along the same lines is the issue of backing up read–only databases over and over again. If these data ...
Transaction Processing
Transaction Processing

... transaction name is the name assigned to a transaction WITH MARK option specifies that the transaction is to be marked in the log  A distributed transaction is one that involves databases on more than one server  The COMMIT TRANSACTION statement successfully ends the transaction started with the B ...
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Object-relational impedance mismatch

The object-relational impedance mismatch is a set of conceptual and technical difficulties that are often encountered when a relational database management system (RDBMS) is being used by a program written in an object-oriented programming language or style, particularly when objects or class definitions are mapped in a straightforward way to database tables or relational schemata.The term object-relational impedance mismatch is derived from the electrical engineering term impedance matching.
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