PowerPoint
... How to store and to manage XML documents? Depends on application requirements: – file system » simple and cheap » often sufficient, especially if collection small and static ...
... How to store and to manage XML documents? Depends on application requirements: – file system » simple and cheap » often sufficient, especially if collection small and static ...
Schema Fragmentation
... Having a (relational) database that is shared by distributed applications in a network opens immediately a possibility to optimize the access to the database, when taking into account which applications at which sites require which data with which frequency. An obviously useful idea is to move the d ...
... Having a (relational) database that is shared by distributed applications in a network opens immediately a possibility to optimize the access to the database, when taking into account which applications at which sites require which data with which frequency. An obviously useful idea is to move the d ...
How to Migrate Your Backend from Access to SQL Server 2000
... Microsoft Access developers generally consider a move to Microsoft SQL Server for performance, security and stability reasons. This process is known as upsizing. Developers will find a number of differences while upsizing from Access to SQL Server. SQL Server and Access are similar but have some maj ...
... Microsoft Access developers generally consider a move to Microsoft SQL Server for performance, security and stability reasons. This process is known as upsizing. Developers will find a number of differences while upsizing from Access to SQL Server. SQL Server and Access are similar but have some maj ...
DB2 Concepts and Terminology for Oracle Professionals Antonio Maranhao, Presenter
... independent -- they only affect the DB2 environment. Slide 9 Moving to Slide 9, here we try to give a brief comparison between how both DB2 and Oracle handle storage and obviously each have their own terminology, but most of them are actually very similar as you can see in the slide. So the database ...
... independent -- they only affect the DB2 environment. Slide 9 Moving to Slide 9, here we try to give a brief comparison between how both DB2 and Oracle handle storage and obviously each have their own terminology, but most of them are actually very similar as you can see in the slide. So the database ...
Referential Integrity Is Important For Databases
... users or applications from entering inconsistent data. Most RDBMS’s have various referential integrity rules that you can apply when you create a relationship between two tables.” [6] • “[Referential integrity is] a database management safeguard that ensures every foreign key matches a primary key. ...
... users or applications from entering inconsistent data. Most RDBMS’s have various referential integrity rules that you can apply when you create a relationship between two tables.” [6] • “[Referential integrity is] a database management safeguard that ensures every foreign key matches a primary key. ...
SQL 1 - New Paltz
... – First find what you don’t want – Throw it away – You are left with what you want. • Since one of these queries may run faster than the other you will need to know how to write both. • You get paid not only for correctness but probably more important, speed. ...
... – First find what you don’t want – Throw it away – You are left with what you want. • Since one of these queries may run faster than the other you will need to know how to write both. • You get paid not only for correctness but probably more important, speed. ...
3. Structure Of DB2
... In this view data is represented by a simple TREE STRUCTURES and DBMS links these data bases using pointers. The user sees three individual trees for supplier database, each tree has a parent supplier. Each tree can be called a supplier record occurrence. Similarly you can see part record occurr ...
... In this view data is represented by a simple TREE STRUCTURES and DBMS links these data bases using pointers. The user sees three individual trees for supplier database, each tree has a parent supplier. Each tree can be called a supplier record occurrence. Similarly you can see part record occurr ...
IST 274 -10 Database Administrator
... Starting Up and Shutting Down the Database Connecting as DBA – To perform startup and shutdown activity, DBAs need to connect to the database with SYSDBA or SYSOPER system privileges • SYSDBA allows startup and shutdown and full access to all database objects • SYSOPER allows startup, shutdown, and ...
... Starting Up and Shutting Down the Database Connecting as DBA – To perform startup and shutdown activity, DBAs need to connect to the database with SYSDBA or SYSOPER system privileges • SYSDBA allows startup and shutdown and full access to all database objects • SYSOPER allows startup, shutdown, and ...
Reengineering of Database Applications to EJB based Architecture
... beans that can accommodate these queries. Mapping SQLs into EJB architecture is an important problem for many reasons. Firstly, there are many legacy systems are being reengineered into EJB based applications. Secondly, the design of the EJB architecture itself should rely not only on the relational ...
... beans that can accommodate these queries. Mapping SQLs into EJB architecture is an important problem for many reasons. Firstly, there are many legacy systems are being reengineered into EJB based applications. Secondly, the design of the EJB architecture itself should rely not only on the relational ...
Azhar Iqbal`s slides
... • MySQL allows users to connect to a specific database on the server and issue requests. • Concurrent access • This system can run on virtually on any platform – UNIX and Windows • MySQL also comes with a source code • MySQL is used at the enterprise level because of its security. ...
... • MySQL allows users to connect to a specific database on the server and issue requests. • Concurrent access • This system can run on virtually on any platform – UNIX and Windows • MySQL also comes with a source code • MySQL is used at the enterprise level because of its security. ...
session 14
... Migrate or upgrade an existing database - If you are using a previous release of Oracle, database creation is required only if you want an entirely new database. Otherwise, you can migrate or upgrade your existing Oracle database managed by a previous version or release of Oracle and use it with the ...
... Migrate or upgrade an existing database - If you are using a previous release of Oracle, database creation is required only if you want an entirely new database. Otherwise, you can migrate or upgrade your existing Oracle database managed by a previous version or release of Oracle and use it with the ...
Database Performance Study - Information Systems Department
... the authors cannot stress enough how important it is to identify the current bottlenecks and go through a comprehensive analysis of the root causes. With user complaints triggering the start of performance analysis, the role of DBA’s is often reduced to fire fighting. The authors were not able to fi ...
... the authors cannot stress enough how important it is to identify the current bottlenecks and go through a comprehensive analysis of the root causes. With user complaints triggering the start of performance analysis, the role of DBA’s is often reduced to fire fighting. The authors were not able to fi ...
SAP_R3PerformanceTuningGuide
... number of rows. With large tables, indexes have a large effect on database I/O performance. Operations, which search and operate upon a single database row or small number of database rows, should have a nonclustered or clustered index defined upon the column or columns that provide the highest leve ...
... number of rows. With large tables, indexes have a large effect on database I/O performance. Operations, which search and operate upon a single database row or small number of database rows, should have a nonclustered or clustered index defined upon the column or columns that provide the highest leve ...
Elmasri/Navathe, Fundamentals of Database Systems, Fourth Edition
... Views in SQL A view is a “virtual” table that is derived from other tables Allows for limited update operations (since the table may not physically be stored) Allows full query operations A convenience for expressing certain operations Elmasri/Navathe, Fundamentals of Database Systems, Fourth E ...
... Views in SQL A view is a “virtual” table that is derived from other tables Allows for limited update operations (since the table may not physically be stored) Allows full query operations A convenience for expressing certain operations Elmasri/Navathe, Fundamentals of Database Systems, Fourth E ...
computing candidate keys of relational operators for optimizing
... A large portion of data generated and stored by scientific databases, data warehouses, and workflow management systems is not entered manually by a user, but is derived from existing data using complex transformations. Understanding the semantics of such data and estimating its quality is not possib ...
... A large portion of data generated and stored by scientific databases, data warehouses, and workflow management systems is not entered manually by a user, but is derived from existing data using complex transformations. Understanding the semantics of such data and estimating its quality is not possib ...