MID LEVEL ORACLE DBA INTERVIEW QUESTIONS
... In Circumstances, all of the data for a row in a table may not be able to fit in the same data block. When this occurs, the data for the row is stored in a chain of data block (one or more) reserved for that segment. ...
... In Circumstances, all of the data for a row in a table may not be able to fit in the same data block. When this occurs, the data for the row is stored in a chain of data block (one or more) reserved for that segment. ...
Honored Guests Database
... The GOC worked off of a database replica, as did the Honored Guest liaison from SOI. This meant that each week the two replicas needed to be synchronized by SOI. Any database changes the GOC had, such as relating tables, needed to be sent to SOI, who in turn sent the request(s) on to the Access mast ...
... The GOC worked off of a database replica, as did the Honored Guest liaison from SOI. This meant that each week the two replicas needed to be synchronized by SOI. Any database changes the GOC had, such as relating tables, needed to be sent to SOI, who in turn sent the request(s) on to the Access mast ...
On Effectiveness of Database Accessing Methods for Subset
... when dealing with specific datasets (e.g. full table scan outperforms B+ trees for selection attributes with high number of key values). A popular method of performing database joins without help of any indexes is sort-merge join method [[9]]. In this method, the database tables are first sorted acc ...
... when dealing with specific datasets (e.g. full table scan outperforms B+ trees for selection attributes with high number of key values). A popular method of performing database joins without help of any indexes is sort-merge join method [[9]]. In this method, the database tables are first sorted acc ...
presentation source - Courses
... operations (select, project, join, etc) that can be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to be perfo ...
... operations (select, project, join, etc) that can be used to build some desired relation from the database. • Relational Calculus provides a notation for formulating the definition of that desired relation in terms of the relations in the database without explicitly stating the operations to be perfo ...
Scaling the Data Tier with Citrix NetScaler SQL Intelligent Load
... awareness NetScaler can switch SQL requests from the client’s single SQL connection to many different backend servers. The “Virtual IP” interface will be the manner in which external processes, applications and users will access the active/passive database nodes connected to the NetScaler. If the ma ...
... awareness NetScaler can switch SQL requests from the client’s single SQL connection to many different backend servers. The “Virtual IP” interface will be the manner in which external processes, applications and users will access the active/passive database nodes connected to the NetScaler. If the ma ...
TupleRank and Implicit Relationship Discovery in - delab-auth
... are only a special case of inclusion dependencies. Inclusion dependencies indicate more general links between tuples that share values for some attributes. However, there is no direct way in SQL to declare general inclusion dependencies. Secondly, database tuples could relate to each other in ways t ...
... are only a special case of inclusion dependencies. Inclusion dependencies indicate more general links between tuples that share values for some attributes. However, there is no direct way in SQL to declare general inclusion dependencies. Secondly, database tuples could relate to each other in ways t ...
Chapter 11
... • Query optimizer analyzes SQL query and finds most efficient way to access data – Validated for syntax compliance – Validated against data dictionary • Tables, column names are correct • User has proper access rights ...
... • Query optimizer analyzes SQL query and finds most efficient way to access data – Validated for syntax compliance – Validated against data dictionary • Tables, column names are correct • User has proper access rights ...
s1108-ronstrom
... NDB kernel to handle disk-based data • The aim to keep its very good performance although data resides on disk • Implementation divided in two phases, first phase puts non-indexed data on disk • Second phase implement disk-based indexes ...
... NDB kernel to handle disk-based data • The aim to keep its very good performance although data resides on disk • Implementation divided in two phases, first phase puts non-indexed data on disk • Second phase implement disk-based indexes ...
Improving Efficiency of Apriori Algorithm using Cache Database
... Apriori gives frequent itemsets which can be used to determine association rules which accent general trends in the database: this has applications in domains such as market basket analysis. Apriori is a "bottom up" approach, where frequent itemsets are considered one item at a time, and groups of i ...
... Apriori gives frequent itemsets which can be used to determine association rules which accent general trends in the database: this has applications in domains such as market basket analysis. Apriori is a "bottom up" approach, where frequent itemsets are considered one item at a time, and groups of i ...
Chapter 1
... database to store tables of customer records, corresponding sales orders, product parts, and employee lists. Various workers can then use the database to efficiently perform their jobs. For example, salespeople can quickly enter or look up sales orders, advertising executives can study and forecast ...
... database to store tables of customer records, corresponding sales orders, product parts, and employee lists. Various workers can then use the database to efficiently perform their jobs. For example, salespeople can quickly enter or look up sales orders, advertising executives can study and forecast ...
Algorithms for Deferred View Maintenance
... updating the view. The overhead increases with the number of views and their complexity. In some applications, immediate view maintenance is simply not possible. For example, in a data warehousing system, if a component database does not know what views exist at the warehouse, it cannot modify trans ...
... updating the view. The overhead increases with the number of views and their complexity. In some applications, immediate view maintenance is simply not possible. For example, in a data warehousing system, if a component database does not know what views exist at the warehouse, it cannot modify trans ...
Slide 1
... As of October 2, 2009: Source: www.tpc.org & www.sap.com/benchmark.SAP TRBK Standard Application Benchmark: Sun Fire E6900 DB Server (8 1.5 GHz US-IV+ processors, 16 cores, 16 threads, 56 GB memory): 10,012,000 Day posts/hr, 6,664,000 Night bal accs/hr, Solaris 10, Oracle 10g, SAP Account Management ...
... As of October 2, 2009: Source: www.tpc.org & www.sap.com/benchmark.SAP TRBK Standard Application Benchmark: Sun Fire E6900 DB Server (8 1.5 GHz US-IV+ processors, 16 cores, 16 threads, 56 GB memory): 10,012,000 Day posts/hr, 6,664,000 Night bal accs/hr, Solaris 10, Oracle 10g, SAP Account Management ...
Customer Case Study Real Application Testing Usage at DIRECTV
... SPA helped find the needle in the stack! Regressed SQL had same execution plans as in 9i, but different in 10g due to bind peeking ...
... SPA helped find the needle in the stack! Regressed SQL had same execution plans as in 9i, but different in 10g due to bind peeking ...
Data-Protection Modes Data Guard provides three high
... • Archiver (ARCn) process: ARCn, or a SQL session performing an archival operation, creates a copy of the online redo logs locally for use in a primary database recovery. The ARCn process may also ship the redo stream to the RFS process while simultaneously archiving the online log. ARCn is also res ...
... • Archiver (ARCn) process: ARCn, or a SQL session performing an archival operation, creates a copy of the online redo logs locally for use in a primary database recovery. The ARCn process may also ship the redo stream to the RFS process while simultaneously archiving the online log. ARCn is also res ...
Parsing a SAS Database for Correctness: A Conceptual Introduction
... functions), the resulting DMP operates at a higher level of abstraction. This allows for databases to be quickly modeled, and for the operation to be performed repeatedly as a production run. In fact, the DMP could be integrated into any "transaction run", and allow only those transactions that resu ...
... functions), the resulting DMP operates at a higher level of abstraction. This allows for databases to be quickly modeled, and for the operation to be performed repeatedly as a production run. In fact, the DMP could be integrated into any "transaction run", and allow only those transactions that resu ...
an introduction to deductive database and its query evalution
... computing and program analysis using its powerful inference engine. This research paper provides an overview of some deductive database theories and query evaluation based on given facts and rules and these are programmed in DATALOG/PROLOG. A DATALOG/PROLOG is a language typically used to specify fa ...
... computing and program analysis using its powerful inference engine. This research paper provides an overview of some deductive database theories and query evaluation based on given facts and rules and these are programmed in DATALOG/PROLOG. A DATALOG/PROLOG is a language typically used to specify fa ...
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... B (not C): You can validate that all database files and archived redo logs can be backed up by running a command as follows: RMAN> BACKUP VALIDATE DATABASE ARCHIVELOG ALL; This form of the command would check for physical corruption. To check for logical corruption, RMAN> BACKUP VALIDATE CHECK LOGIC ...
... B (not C): You can validate that all database files and archived redo logs can be backed up by running a command as follows: RMAN> BACKUP VALIDATE DATABASE ARCHIVELOG ALL; This form of the command would check for physical corruption. To check for logical corruption, RMAN> BACKUP VALIDATE CHECK LOGIC ...
Schemaless database storage (PostGIS) with FME
... Quality, structure and distribution Variable quality. Most datasets still not approved. Different structure and schemas. Different ways of distribution(download, service, ...
... Quality, structure and distribution Variable quality. Most datasets still not approved. Different structure and schemas. Different ways of distribution(download, service, ...
Course Review
... Super Key : This is normally a key with too many attributes in it. Some of the columns could be removed and a key would still exist. A good example is a key which contains ‘old value/new value’ such as ‘old telephone number/new telephone number’ when numbers are upgrades or altered. A Primary Key : ...
... Super Key : This is normally a key with too many attributes in it. Some of the columns could be removed and a key would still exist. A good example is a key which contains ‘old value/new value’ such as ‘old telephone number/new telephone number’ when numbers are upgrades or altered. A Primary Key : ...
Databases
... inquiry tools to allow users to access and format data without directly using the DML. Some DBMSs include a transaction processing monitor (or TP monitor) that manages on-line accesses to the database, and ensures that transactions that impact multiple tables are fully processed as a single unit. ...
... inquiry tools to allow users to access and format data without directly using the DML. Some DBMSs include a transaction processing monitor (or TP monitor) that manages on-line accesses to the database, and ensures that transactions that impact multiple tables are fully processed as a single unit. ...
Modular Data Storage with Anvil
... while others layer above storage dTables, transforming their contents. dTables can represent row stores and column stores, but their fine-grained modularity offers database designers more possibilities. For example, a typical Anvil configuration splits a single “table” into several distinct dTables, ...
... while others layer above storage dTables, transforming their contents. dTables can represent row stores and column stores, but their fine-grained modularity offers database designers more possibilities. For example, a typical Anvil configuration splits a single “table” into several distinct dTables, ...
Chapter 14 Methodology - Conceptual Database Design
... The answer to this question should be described in the specification. However, in some cases it may be necessary to ask the users to clarify the requirements. Unfortunately, they may give answers to this question that also contain other concepts, so that the users’ responses must be carefully consid ...
... The answer to this question should be described in the specification. However, in some cases it may be necessary to ask the users to clarify the requirements. Unfortunately, they may give answers to this question that also contain other concepts, so that the users’ responses must be carefully consid ...
Technology Plug-In PPT 6 - McGraw Hill Higher Education
... Using The Relationships Window • To define relationships between tables follow these steps: 1. Open the Relationships window by clicking on the Database Tools tab and selecting the Relationships button 2. Select each table listed (i.e., BIKE, CUSTOMER, and RENTAL) and click the Add button, then cli ...
... Using The Relationships Window • To define relationships between tables follow these steps: 1. Open the Relationships window by clicking on the Database Tools tab and selecting the Relationships button 2. Select each table listed (i.e., BIKE, CUSTOMER, and RENTAL) and click the Add button, then cli ...
Presentation
... • Elements added to queries in order for the global join to be executed in Unity Driver. ...
... • Elements added to queries in order for the global join to be executed in Unity Driver. ...