Who Do You Have? Where Are They?
... subjects do you have? In what data sets do they provide data? Is the data in the different data sets consistent? If you had only 2 or 3 small data sets, you might just open them up with the SAS viewer and resolve these questions by inspection. However, when your database consists of dozens, if not h ...
... subjects do you have? In what data sets do they provide data? Is the data in the different data sets consistent? If you had only 2 or 3 small data sets, you might just open them up with the SAS viewer and resolve these questions by inspection. However, when your database consists of dozens, if not h ...
Course material
... By authenticating himself towards the DBMS the client has to create a databaseconnection (session) before starting to execute database operations. During the session creation in the Oracle system the DBMS allocates resources for the session, by reserving memory (Process Global Area – PGA) and by sta ...
... By authenticating himself towards the DBMS the client has to create a databaseconnection (session) before starting to execute database operations. During the session creation in the Oracle system the DBMS allocates resources for the session, by reserving memory (Process Global Area – PGA) and by sta ...
SQL Server 2000_ado_xsl
... configuration tool that allows developers to gain remote access to databases using URL based queries over HTTP. For example, we can setup an SQL XML virtual directory on our Web server named "myVirtual". Then, assuming we have the appropriate security permissions, we can use any browser to query our ...
... configuration tool that allows developers to gain remote access to databases using URL based queries over HTTP. For example, we can setup an SQL XML virtual directory on our Web server named "myVirtual". Then, assuming we have the appropriate security permissions, we can use any browser to query our ...
Oracle's HA Vision
... • Provides HA for custom apps where update conflicts can be avoided or managed ...
... • Provides HA for custom apps where update conflicts can be avoided or managed ...
Ch3
... About Relational Model Order of tuples not important Order of attributes not important (in theory) Collection of relation schemas (intension) Relational database schema Corresponding relation instances (extension) Relational database ...
... About Relational Model Order of tuples not important Order of attributes not important (in theory) Collection of relation schemas (intension) Relational database schema Corresponding relation instances (extension) Relational database ...
OLAP2 outline Multi Dimensional Data Model A Sample Data Cube
... representing certain types of aggregations. So the representation of aggregations always follows the containment principal. So the relational model has a strong mathematical base, which is nothing but a set concept in a similar way here. Why not of What is Polygon means? polygon is a general term, p ...
... representing certain types of aggregations. So the representation of aggregations always follows the containment principal. So the relational model has a strong mathematical base, which is nothing but a set concept in a similar way here. Why not of What is Polygon means? polygon is a general term, p ...
ppt - Fordham University Computer and Information Sciences
... select distinct customer_name from borrower, loan where borrower loan_number = loan.loan_number and branch_name = 'Perryridge' order by customer_name We may specify desc for descending order or asc for ascending ...
... select distinct customer_name from borrower, loan where borrower loan_number = loan.loan_number and branch_name = 'Perryridge' order by customer_name We may specify desc for descending order or asc for ascending ...
Java Database Connectivity
... data to, and loading data from, persistent storage. Within a CTM (application) server, enterprise information in the business-logic tier is represented using remote objects. As with all objects, a remote object captures state by encapsulating local data as a set of attributes. Consequently, the long ...
... data to, and loading data from, persistent storage. Within a CTM (application) server, enterprise information in the business-logic tier is represented using remote objects. As with all objects, a remote object captures state by encapsulating local data as a set of attributes. Consequently, the long ...
Setting Up a Hot Standby Database
... • Can control checkpoint frequency several ways: via size of redo logs, and parameters such as: – FAST_START_IO_TARGET – LOG_CHECKPOINT_INTERVAL. ...
... • Can control checkpoint frequency several ways: via size of redo logs, and parameters such as: – FAST_START_IO_TARGET – LOG_CHECKPOINT_INTERVAL. ...
Document
... They can be a (reasonably) easy way to get HA going without specialized hardware, but… Multiply the storage costs, as you’ll be paying per server Reading off a secondary? That’ll cost you Multi-subnet configuration can lead to management nightmares SQLPS, SSMS do not support the MultiSubne ...
... They can be a (reasonably) easy way to get HA going without specialized hardware, but… Multiply the storage costs, as you’ll be paying per server Reading off a secondary? That’ll cost you Multi-subnet configuration can lead to management nightmares SQLPS, SSMS do not support the MultiSubne ...
Powerpoint
... Generally, DON’T DO IT. I DON’T KNOW WHY WE’RE EVEN TELLING YOU ABOUT IT. Might seem desirable if you need new data in a 1-1 relationship with an existing table/view. But road to hell is(1) paved with good intentions, and (2) has an on-ramp any time you say “I know a shortcut!” ...
... Generally, DON’T DO IT. I DON’T KNOW WHY WE’RE EVEN TELLING YOU ABOUT IT. Might seem desirable if you need new data in a 1-1 relationship with an existing table/view. But road to hell is(1) paved with good intentions, and (2) has an on-ramp any time you say “I know a shortcut!” ...
W-7 OMT-II
... (the table where we will insert the data). The mechanism is similar to that of a make-table query in so far as we define a selection query which permits us to obtain the data to save, and what does vary is that now we have to indicate into which column we want to save every value. To create an Appen ...
... (the table where we will insert the data). The mechanism is similar to that of a make-table query in so far as we define a selection query which permits us to obtain the data to save, and what does vary is that now we have to indicate into which column we want to save every value. To create an Appen ...
JOXM: Java Object — XML Mapping
... automated tools for storing and processing XML data in databases seems to stifle its adoption in application development, especially when compared with some of the rich tools, such as ORMs like Hibernate, that are available for use on relational databases. There are many ORMs for relational database ...
... automated tools for storing and processing XML data in databases seems to stifle its adoption in application development, especially when compared with some of the rich tools, such as ORMs like Hibernate, that are available for use on relational databases. There are many ORMs for relational database ...
COMMIT - Telkom University
... Lost updates occur when two or more transactions selects the same row and then update the row based on the value originally selected. Each transactions is unaware of other transactions. The last update overwrites updates made by the other transactions, which results in lost data. A's update of 300 v ...
... Lost updates occur when two or more transactions selects the same row and then update the row based on the value originally selected. Each transactions is unaware of other transactions. The last update overwrites updates made by the other transactions, which results in lost data. A's update of 300 v ...
Entity type - International Islamic University Chittagong
... • An entity type that associates the instances of one or more entity types and contains attributes that are peculiar to the relationship between those entity instances. • Ex: Suppose an organization wishes to record the date when an employee completes each course. The attribute Date-Completed is not ...
... • An entity type that associates the instances of one or more entity types and contains attributes that are peculiar to the relationship between those entity instances. • Ex: Suppose an organization wishes to record the date when an employee completes each course. The attribute Date-Completed is not ...
Biacore 8K Database Installation and Management Guide
... Biacore 8K software supports the use of different database servers, different databases and different types of users. Several instruments can store run data in the same database. Moving objects between databases is also supported to some extent, using import-export functionality from within the soft ...
... Biacore 8K software supports the use of different database servers, different databases and different types of users. Several instruments can store run data in the same database. Moving objects between databases is also supported to some extent, using import-export functionality from within the soft ...
HP OpenView Data Extraction and Reporting
... • Capable of generating many types of graphs, and formatting data in many ways ...
... • Capable of generating many types of graphs, and formatting data in many ways ...
Document
... A surrogate key is a unique, DBMS-supplied identifier used as the primary key of a relation The values of a surrogate key have no meaning to the users and are normally hidden on forms and reports DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys tha ...
... A surrogate key is a unique, DBMS-supplied identifier used as the primary key of a relation The values of a surrogate key have no meaning to the users and are normally hidden on forms and reports DBMS does not allow the value of a surrogate key to be changed Disadvantages: – Foreign keys tha ...
Programmable Order-Preserving Secure Index for
... the techniques [9] for data distribution modeling. In addition, the scheme [2] can only deal with plaintexts in a finite domain. The cryptographic study of the order-preserving encryption scheme is done in [3]. The work [1] shows a way of building order-preserving polynomials, which are based on the ...
... the techniques [9] for data distribution modeling. In addition, the scheme [2] can only deal with plaintexts in a finite domain. The cryptographic study of the order-preserving encryption scheme is done in [3]. The work [1] shows a way of building order-preserving polynomials, which are based on the ...
R - Department of Computer Science
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (e.g., 2nd column of r deals with the same type of values as does the 2nd column of s) E.g. to find all customers with either an account or a loan ...
... 1. r, s must have the same arity (same number of attributes) 2. The attribute domains must be compatible (e.g., 2nd column of r deals with the same type of values as does the 2nd column of s) E.g. to find all customers with either an account or a loan ...
IOSR Journal of Electronics and Communication Engineering (IOSR-JECE)
... AVL-tree and the T-tree. While the disk-oriented indices are designed primarily to minimize the number of disk block accesses and to minimize disk space, the memory-resident indices aim to reduce computation time while using as little memory as possible. For real-time applications, the memory-reside ...
... AVL-tree and the T-tree. While the disk-oriented indices are designed primarily to minimize the number of disk block accesses and to minimize disk space, the memory-resident indices aim to reduce computation time while using as little memory as possible. For real-time applications, the memory-reside ...
Introduction (cont.)
... the basic SOM A hybrid clustering algorithm that fully exploit the online learning and multi-resolution characteristics of SOTT is devised. A new linkage metric is proposed which can be updated online to accelerate the time consuming agglomerative hierarchical clustering stage. ...
... the basic SOM A hybrid clustering algorithm that fully exploit the online learning and multi-resolution characteristics of SOTT is devised. A new linkage metric is proposed which can be updated online to accelerate the time consuming agglomerative hierarchical clustering stage. ...
Relational model
The relational model for database management is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.