The ER Database Model - Department of Computer Science
... view of the data, not the physical view. There are no pointers for the user to worry about. The only data are explicit values in tables. All data values in the cells of tables are Atomic (also known as Scalar). Exactly one data value and not a set or a repeating group is allowed in each cell. ...
... view of the data, not the physical view. There are no pointers for the user to worry about. The only data are explicit values in tables. All data values in the cells of tables are Atomic (also known as Scalar). Exactly one data value and not a set or a repeating group is allowed in each cell. ...
Chapter 4: SQL - Avi Silberschatz
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
The ER Database Model - Department of Computer Science
... view of the data, not the physical view. There are no pointers for the user to worry about. The only data are explicit values in tables. All data values in the cells of tables are Atomic (also known as Scalar). Exactly one data value and not a set or a repeating group is allowed in each cell. ...
... view of the data, not the physical view. There are no pointers for the user to worry about. The only data are explicit values in tables. All data values in the cells of tables are Atomic (also known as Scalar). Exactly one data value and not a set or a repeating group is allowed in each cell. ...
ppt - Avi Silberschatz
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
Physical Database Design
... back-up copies for his/her own use only and not for distribution or resale. The Publisher assumes no responsibility for errors, omissions, or damages caused by the use of these programs or from the use of the information contained ...
... back-up copies for his/her own use only and not for distribution or resale. The Publisher assumes no responsibility for errors, omissions, or damages caused by the use of these programs or from the use of the information contained ...
SQL Slides
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
... average account balance is greater than $1200. select branch-name, avg-balance from (select branch-name, avg (balance) from account group by branch-name) as result (branch-name, avg-balance) where avg-balance > 1200 Note that we do not need to use the having clause, since we compute the temporary (v ...
50401A-ENU_Powerpnt_08
... overhead of creating and managing row versions An application requires absolute accuracy for long-running aggregations or queries where data values must be consistent to the point in time that a query starts ...
... overhead of creating and managing row versions An application requires absolute accuracy for long-running aggregations or queries where data values must be consistent to the point in time that a query starts ...
Security Options in Oracle, the matrix of what`s
... Practical ways to secure your corporate information, Donald Shepard, Oracle Corp., www.poug.org Secure configuration guide for Oracle9iR2; Oracle, June 2002 Oracle gurus: Mary Ann Davidson, Kristy Browder and Sudhayer Neither TUSC, Oracle, IOUG nor the author guarantee this document to be error-free ...
... Practical ways to secure your corporate information, Donald Shepard, Oracle Corp., www.poug.org Secure configuration guide for Oracle9iR2; Oracle, June 2002 Oracle gurus: Mary Ann Davidson, Kristy Browder and Sudhayer Neither TUSC, Oracle, IOUG nor the author guarantee this document to be error-free ...
Migration from a 2-tier to 3-tier web application of NEWRUTF
... business logic or the database wont effect the front end. Actually the layer between front end and back end (IoDAO library) supports Oracle Database as well as SQL server. The web application helps in solving release management problems. The new releases are easy to deploy. For e.g. In the existing ...
... business logic or the database wont effect the front end. Actually the layer between front end and back end (IoDAO library) supports Oracle Database as well as SQL server. The web application helps in solving release management problems. The new releases are easy to deploy. For e.g. In the existing ...
How to set up SQL Source Control
... The next few pages show you how to set up SQL Source Control with Team Foundation Server (TFS) or Subversion (SVN). If you’re using Git, you can safely skip ahead to page 9, where the setup instructions for Git begin. If you don’t have a source control system, skip to page 12, where the setup instru ...
... The next few pages show you how to set up SQL Source Control with Team Foundation Server (TFS) or Subversion (SVN). If you’re using Git, you can safely skip ahead to page 9, where the setup instructions for Git begin. If you don’t have a source control system, skip to page 12, where the setup instru ...
Database System Concepts and Architecture
... processes of transforming requests and results between levels are called mappings. These mappings may be time-consuming, so some DBMSs—especially those that are meant to support small databases—do not support external views. Even in such systems, however, a certain amount of mapping is necessary to ...
... processes of transforming requests and results between levels are called mappings. These mappings may be time-consuming, so some DBMSs—especially those that are meant to support small databases—do not support external views. Even in such systems, however, a certain amount of mapping is necessary to ...
An Introduction to Oracle SQL Developer Data Modeler
... model, relational models, and physical models. There is a one-to-many implementation when moving from the logical to the relational to the physical layer, which means that you can create multiple instances at the next, lower level in the hierarchy. Properties set at the upper layers are reflected an ...
... model, relational models, and physical models. There is a one-to-many implementation when moving from the logical to the relational to the physical layer, which means that you can create multiple instances at the next, lower level in the hierarchy. Properties set at the upper layers are reflected an ...
Chapter 1 - Websupport1
... processing data to reveal its meaning. • To implement and manage a database, use a DBMS. • Database design defines the database structure. • A well-designed database facilitates data management and generates accurate and valuable information. • A poorly designed database can lead to bad decision mak ...
... processing data to reveal its meaning. • To implement and manage a database, use a DBMS. • Database design defines the database structure. • A well-designed database facilitates data management and generates accurate and valuable information. • A poorly designed database can lead to bad decision mak ...
employee management system
... The activity diagrams (see figure 1.4) shows a summary of all the user activities. This all starts with logging into the system. The user enters his or her employee id and password. The input is authenticated by the system and when it’s been successfully authenticated then the privileges are checked ...
... The activity diagrams (see figure 1.4) shows a summary of all the user activities. This all starts with logging into the system. The user enters his or her employee id and password. The input is authenticated by the system and when it’s been successfully authenticated then the privileges are checked ...
Incrementally Mining Frequent Itemsets in Update Distorted Databases
... in update distorted databases. We first develop an efficient incremental updating computation method to quickly reconstruct an itemset’s support by using the additional information stored during the earlier mining process. Then, a new concept supporting aggregate (SA) is introduced and represented w ...
... in update distorted databases. We first develop an efficient incremental updating computation method to quickly reconstruct an itemset’s support by using the additional information stored during the earlier mining process. Then, a new concept supporting aggregate (SA) is introduced and represented w ...
ODB (Observational Database) and its usage at ECMWF Anne
... execute ODB/SQL queries, update & store queried data; ...
... execute ODB/SQL queries, update & store queried data; ...
Performance
... Reduce lock contention Rewriting of queries to improve performance was important in the past, but smart optimizers have made this less important Communication overhead and query handling overheads significant part of cost of each call ...
... Reduce lock contention Rewriting of queries to improve performance was important in the past, but smart optimizers have made this less important Communication overhead and query handling overheads significant part of cost of each call ...
