ppt
... • At the time of a system crash, only the log entries that have been written back to disk are considered in the recovery process because the contents of main memory may be lost.) • Force writing a log: • Before a transaction reaches its commit point, any portion of the log that has not been written ...
... • At the time of a system crash, only the log entries that have been written back to disk are considered in the recovery process because the contents of main memory may be lost.) • Force writing a log: • Before a transaction reaches its commit point, any portion of the log that has not been written ...
Question: 1 Which three methods can you use to run an Automatic
... B. The above SQL statement will fail because you cannot rename an undo tablespace. C. The tablespace will be renamed and all the changes will be logged in the alert log file. D. The tablespace will be renamed but a message will be added to the alert log file indicating that you should change the cor ...
... B. The above SQL statement will fail because you cannot rename an undo tablespace. C. The tablespace will be renamed and all the changes will be logged in the alert log file. D. The tablespace will be renamed but a message will be added to the alert log file indicating that you should change the cor ...
An Overview of Data Models
... ease of use – the productivity of programmers » provides a simple, limited approach to structuring data, yet is reasonably versatile, so anything can be modeled » provides a limited collection of operations on data ...
... ease of use – the productivity of programmers » provides a simple, limited approach to structuring data, yet is reasonably versatile, so anything can be modeled » provides a limited collection of operations on data ...
teradata utilities - dbmanagement.info
... BTEQ supports the following facilities: Multiple Teradata SQL statements per request Read from and write to client data files Manage multiple sessions per job Format output and write sophisticated reports ...
... BTEQ supports the following facilities: Multiple Teradata SQL statements per request Read from and write to client data files Manage multiple sessions per job Format output and write sophisticated reports ...
Replica Refresh Strategies in a Database Cluster
... refreshment can take much time and hurt performance. In this paper, we propose to support routing-independent refresh strategies that can maintain nodes at a reasonable level of freshness, independently of which queries are routed to them. Thus, refresh transactions can be triggered based on events ...
... refreshment can take much time and hurt performance. In this paper, we propose to support routing-independent refresh strategies that can maintain nodes at a reasonable level of freshness, independently of which queries are routed to them. Thus, refresh transactions can be triggered based on events ...
foreign key
... A Surrogate Key • A surrogate key is a unique, numeric value that is added to a relation to serve as the primary key • Surrogate key values have no meaning to users and are usually hidden on forms, queries and reports • A surrogate key is often used in place of a composite primary key KROENKE and A ...
... A Surrogate Key • A surrogate key is a unique, numeric value that is added to a relation to serve as the primary key • Surrogate key values have no meaning to users and are usually hidden on forms, queries and reports • A surrogate key is often used in place of a composite primary key KROENKE and A ...
A Survey on Query Processing and Optimization
... an example selection query over a persons relation and several query plans that query. ...
... an example selection query over a persons relation and several query plans that query. ...
Chapter 3 Notes
... Consider each pair of tuples tr from r and ts from s. If tr and ts have the same value on each of the attributes in R S, add a tuple t to the result, where t has the same value as t on r ...
... Consider each pair of tuples tr from r and ts from s. If tr and ts have the same value on each of the attributes in R S, add a tuple t to the result, where t has the same value as t on r ...
Chapter 4 Implementation of Relational Operators
... optimization cannot be to find a query plan that minimizes all cost metrics but must be to find a query plan that realizes the best compromise between different cost metrics. What the best compromise is depends on user preferences (e.g., some users might prefer a cheaper plan while others prefer a f ...
... optimization cannot be to find a query plan that minimizes all cost metrics but must be to find a query plan that realizes the best compromise between different cost metrics. What the best compromise is depends on user preferences (e.g., some users might prefer a cheaper plan while others prefer a f ...
Data Management Layer Design (II)
... existing tables and querying them. It is not possible to duplicate the semantics of joining 2 tables by joining two classes (so OODBMSs are less flexible than RDBMSs from that perspective) ...
... existing tables and querying them. It is not possible to duplicate the semantics of joining 2 tables by joining two classes (so OODBMSs are less flexible than RDBMSs from that perspective) ...
ODBC: Open DataBase Connectivity
... • Some connection options must be set before the connection to the database is performed • Pass these into the new() function: $db = new Win32::ODBC( $Dsn, ODBC::SQL_LOGIN_TIMEOUT => 10, ODBC::SQL_OPT_TRACEFILE => ‘c:\trace.log’, ODBC::SQL_OPT_TRACE => ODBC::SQL_OPT_TRACE_ON ); ...
... • Some connection options must be set before the connection to the database is performed • Pass these into the new() function: $db = new Win32::ODBC( $Dsn, ODBC::SQL_LOGIN_TIMEOUT => 10, ODBC::SQL_OPT_TRACEFILE => ‘c:\trace.log’, ODBC::SQL_OPT_TRACE => ODBC::SQL_OPT_TRACE_ON ); ...
Document
... Upgrades from 10g to 11g • 10.2.0.4 patchkit actually has the Database Replay tools built in • DBMS_WORKLOAD_CAPTURE package available. • You can use this to capture workload from 10.2.0.4 and apply those to a 11.1 DB. ...
... Upgrades from 10g to 11g • 10.2.0.4 patchkit actually has the Database Replay tools built in • DBMS_WORKLOAD_CAPTURE package available. • You can use this to capture workload from 10.2.0.4 and apply those to a 11.1 DB. ...
Control and Monitor Facilities for Multi-User Access
... MUDBACF functions available that allow dynamic .modification of a access profHe entry. The Systems and Database Support Staff has OBA and systems responsibilities. AU MUDBACF capabilities are available to this staff via a global password. The information center/help desk personnel 'wlll at times nee ...
... MUDBACF functions available that allow dynamic .modification of a access profHe entry. The Systems and Database Support Staff has OBA and systems responsibilities. AU MUDBACF capabilities are available to this staff via a global password. The information center/help desk personnel 'wlll at times nee ...
Copyright © 2014 Oracle and/or its affiliates. All rights reserved.
... “Spinning up a database, a process that used to take two to three weeks, now takes us only 19 minutes, something like a 1,000% improvement in deployment time. Accelerating deployment to this degree has brought us much closer to the customer service levels our business goals demand.” ...
... “Spinning up a database, a process that used to take two to three weeks, now takes us only 19 minutes, something like a 1,000% improvement in deployment time. Accelerating deployment to this degree has brought us much closer to the customer service levels our business goals demand.” ...
php-mysqli
... retrieved with the mysqli_query() function, use the mysqli_free_result() function to close the ...
... retrieved with the mysqli_query() function, use the mysqli_free_result() function to close the ...
ACTIVE Deliverable template - PlanetData
... applications. The main contribution of the SciLens cluster is that it provides a platform on which we can carry out experiments to help develop, examine, compare and improve new DBMS techniques for the scientific applications. SciLens enables various possibilities to run experiments on large cluster ...
... applications. The main contribution of the SciLens cluster is that it provides a platform on which we can carry out experiments to help develop, examine, compare and improve new DBMS techniques for the scientific applications. SciLens enables various possibilities to run experiments on large cluster ...
Differences and Interrelationships Between the SQL Procedure and SAS/ACCESS Software
... database entity created by PROC SOL is available for use in other SAS procedures, induding tables, indexes and views. Tables, as mentioned in the lntroduction, are SAS data sets. Indexes can be created on tables to improve the performance of programs that use those tables. PROC SOL views are a type ...
... database entity created by PROC SOL is available for use in other SAS procedures, induding tables, indexes and views. Tables, as mentioned in the lntroduction, are SAS data sets. Indexes can be created on tables to improve the performance of programs that use those tables. PROC SOL views are a type ...
Document
... Let r(R) and s(S) be relations, and let S R r s = R-S (r ) – R-S ( ( R-S (r ) x s ) – R-S,S(r )) To see why ...
... Let r(R) and s(S) be relations, and let S R r s = R-S (r ) – R-S ( ( R-S (r ) x s ) – R-S,S(r )) To see why ...
chapter 1 - Sacramento - California State University
... distributed computing. Specifying the Federated option when creating your table tells MySQL that the table is actually resident in another database server. MySQL uses an URL-like formatted string to tell MySQL the location of the remote table as part of the COMMENT portion of your Create Table state ...
... distributed computing. Specifying the Federated option when creating your table tells MySQL that the table is actually resident in another database server. MySQL uses an URL-like formatted string to tell MySQL the location of the remote table as part of the COMMENT portion of your Create Table state ...
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"".