SQL PRIMARY KEY Constraint
... Microsoft's ISNULL() function is used to specify how we want to treat NULL values. The NVL(), IFNULL(), and COALESCE() functions can also be used to achieve the same result. In this case we want NULL values to be zero. Below, if "UnitsOnOrder" is NULL it will not harm the calculation, because ISNULL ...
... Microsoft's ISNULL() function is used to specify how we want to treat NULL values. The NVL(), IFNULL(), and COALESCE() functions can also be used to achieve the same result. In this case we want NULL values to be zero. Below, if "UnitsOnOrder" is NULL it will not harm the calculation, because ISNULL ...
2nd Semantic Web Mining Workshop at ECML/PKDD
... protocol. 2. In all the sources where X is present, expressions are determined for this attribute, through which it can further be converted into the same scale in all the sources. This allows using the values of attributes on the metalevel regardless of the data source from which they originated. 2 ...
... protocol. 2. In all the sources where X is present, expressions are determined for this attribute, through which it can further be converted into the same scale in all the sources. This allows using the values of attributes on the metalevel regardless of the data source from which they originated. 2 ...
Messages
... 3052 MS-DOS file sharing lock count exceeded. You need to increase the number of locks installed with SHARE.EXE. 3053 Too many client tasks. 3054 Too many Memo or Long Binary fields. 3055 Not a valid file name. 3056 Couldn't repair this database. 3057 Operation not supported on attached tables. 3058 ...
... 3052 MS-DOS file sharing lock count exceeded. You need to increase the number of locks installed with SHARE.EXE. 3053 Too many client tasks. 3054 Too many Memo or Long Binary fields. 3055 Not a valid file name. 3056 Couldn't repair this database. 3057 Operation not supported on attached tables. 3058 ...
Data Access Objects and Visual Basic
... MS-Access Database Programming MS-Access uses Visual-Basic for Applications (VBA) as its native programming language. The use of VBA allows the database developer to create sophisticate applications pulling their data from either MS-Access DB and/or other external data sources. VBA is typically used ...
... MS-Access Database Programming MS-Access uses Visual-Basic for Applications (VBA) as its native programming language. The use of VBA allows the database developer to create sophisticate applications pulling their data from either MS-Access DB and/or other external data sources. VBA is typically used ...
contained database authentication
... The Always On Availability Groups feature is a high-availability and disaster-recovery solution. Introduced in SQL Server 2012, Always On Availability Groups maximizes the availability of a set of user databases for a company. Important note: An availability group fails over at the level of an avail ...
... The Always On Availability Groups feature is a high-availability and disaster-recovery solution. Introduced in SQL Server 2012, Always On Availability Groups maximizes the availability of a set of user databases for a company. Important note: An availability group fails over at the level of an avail ...
Study Guide for Midterm 2, PPT - Department of Computer Science
... For one-to-one relationship sets, the relation’s primary key can be that of either entity set. For many-to-many relationship sets, the union of the primary keys becomes the relation’s primary key ...
... For one-to-one relationship sets, the relation’s primary key can be that of either entity set. For many-to-many relationship sets, the union of the primary keys becomes the relation’s primary key ...
DataGuard SwitchOver steps
... database have the exact same directory path to the online redo logs, it is acceptable to set LOG_FILE_NAME_CONVERT such that the entry pairs have the same value. As an example, if the online redo logs are stored in /oradata/order_db/redo for both the primary and physical standby databases on their ...
... database have the exact same directory path to the online redo logs, it is acceptable to set LOG_FILE_NAME_CONVERT such that the entry pairs have the same value. As an example, if the online redo logs are stored in /oradata/order_db/redo for both the primary and physical standby databases on their ...
Plug Into The Cloud c
... Introducing Oracle Database 12c Designed for the cloud, Oracle Database 12c and Oracle Multitenant enables customers to make more efficient use of their IT resources while continuing to improve their users’ service levels and reduce IT costs. The latest release of Oracle Database 12c, Release 12.1. ...
... Introducing Oracle Database 12c Designed for the cloud, Oracle Database 12c and Oracle Multitenant enables customers to make more efficient use of their IT resources while continuing to improve their users’ service levels and reduce IT costs. The latest release of Oracle Database 12c, Release 12.1. ...
select
... 'ASC' sorts the data in ascending order, and 'DESC' sorts it in descending order. The default is 'ASC'. The order of sorted attributes is significant. The first attribute specified is sorted on first, then the second attribute is used to break any ties, etc. NULL is normally treated as less than all ...
... 'ASC' sorts the data in ascending order, and 'DESC' sorts it in descending order. The default is 'ASC'. The order of sorted attributes is significant. The first attribute specified is sorted on first, then the second attribute is used to break any ties, etc. NULL is normally treated as less than all ...
Slide 1
... administrators to manage their databases, not data. Oracle is leading the pack of database makers with the new access restriction features. Microsoft, IBM and Sybase don't have anything like this.” Oracle wants to rein in database admins ...
... administrators to manage their databases, not data. Oracle is leading the pack of database makers with the new access restriction features. Microsoft, IBM and Sybase don't have anything like this.” Oracle wants to rein in database admins ...
Ch. 2c ppt - Computer Science
... performed within the database. In principle, they do not apply when: An operation spawns several databases the operations access data not in the database (e.g., in the server) To help with this problem, the Distributed Transaction processing Model was created by X/Open (a standard’s body). The h ...
... performed within the database. In principle, they do not apply when: An operation spawns several databases the operations access data not in the database (e.g., in the server) To help with this problem, the Distributed Transaction processing Model was created by X/Open (a standard’s body). The h ...
Transparent Access on Encrypted Data Distributed over
... iDataGuard from our solution that is based on the standard IaaS paradigm. Cloud storage services can take advantage of several benefits with respect to IaaS, because they transparently provide customers with advanced API-based solutions for elasticity, scalability and availability. These techniques ...
... iDataGuard from our solution that is based on the standard IaaS paradigm. Cloud storage services can take advantage of several benefits with respect to IaaS, because they transparently provide customers with advanced API-based solutions for elasticity, scalability and availability. These techniques ...
JDBC
... An applet is usually restricted to be able to connect only to the machine from which it downloaded. – Now there are signed applets from which a browser can determine if the applet is from a trusted source; if so, the applet can be given additional access. ...
... An applet is usually restricted to be able to connect only to the machine from which it downloaded. – Now there are signed applets from which a browser can determine if the applet is from a trusted source; if so, the applet can be given additional access. ...
a taxonomy and comparison of hadoop distributed file system with
... comparison on both Distributed File systems can help to choose an appropriate distributed file system according to the customer requirements. Hadoop distributed file system Suitable for application that has large data sets, very large files, fault tolerant which ensures that in case of any failures ...
... comparison on both Distributed File systems can help to choose an appropriate distributed file system according to the customer requirements. Hadoop distributed file system Suitable for application that has large data sets, very large files, fault tolerant which ensures that in case of any failures ...
Key Data Replication Criteria for Enabling Operational
... 3 The Need for Data Replication Data Replication in a Nutshell – Data replication is an alternative technology for copying data from source to target systems. The main difference with a more classic ETL solution is that with data replication new data is continuously copied to the target system. When ...
... 3 The Need for Data Replication Data Replication in a Nutshell – Data replication is an alternative technology for copying data from source to target systems. The main difference with a more classic ETL solution is that with data replication new data is continuously copied to the target system. When ...
Database Procedural Programming PL/SQL and Embedded SQL
... A set of SQL and PL/SQL statements grouped together as a unit (block) to solve a specific problem or perform a set of related tasks. An anonymous block is a PL/SQL block that appears within your application and it is not named or stored in the database. In many applications, PL/SQL blocks can appe ...
... A set of SQL and PL/SQL statements grouped together as a unit (block) to solve a specific problem or perform a set of related tasks. An anonymous block is a PL/SQL block that appears within your application and it is not named or stored in the database. In many applications, PL/SQL blocks can appe ...
Chapter 7: Relational Database Design
... Generating the result of r1 r2 r3 sorted on the attributes common with r4 or r5 may be useful, but generating it sorted on the attributes common only r1 and r2 is not useful. Using merge-join to compute r1 r2 r3 may be costlier, but may provide an output sorted in an interesting order. Not suf ...
... Generating the result of r1 r2 r3 sorted on the attributes common with r4 or r5 may be useful, but generating it sorted on the attributes common only r1 and r2 is not useful. Using merge-join to compute r1 r2 r3 may be costlier, but may provide an output sorted in an interesting order. Not suf ...
original - Kansas State University
... Drop and Alter Table Constructs: Review The drop table command deletes all information about the dropped relation from the database. The alter table command is used to add attributes to an existing relation: alter table r add A D where A is the name of the attribute to be added to relation r an ...
... Drop and Alter Table Constructs: Review The drop table command deletes all information about the dropped relation from the database. The alter table command is used to add attributes to an existing relation: alter table r add A D where A is the name of the attribute to be added to relation r an ...
Java Database Connectivity (JDBC)
... Can be used for multiple databases (vendor independent) Communication between the client and the middle layer is database independent The middle layer translates to the language of the database Client → JDBC driver → intermediate layer server → database ...
... Can be used for multiple databases (vendor independent) Communication between the client and the middle layer is database independent The middle layer translates to the language of the database Client → JDBC driver → intermediate layer server → database ...
branch-name
... strings. Patterns are described using two special characters: percent (%). The % character matches any substring. underscore (_). The _ character matches any character. Find the names of all customers whose street includes the substring ...
... strings. Patterns are described using two special characters: percent (%). The % character matches any substring. underscore (_). The _ character matches any character. Find the names of all customers whose street includes the substring ...
mapping variables
... In some cases, you need to filter data based on one or more conditions before writing it to targets. For example, if you have a human resources data warehouse containing information about current employees, you might want to filter out employees who are part-time and hourly. The mapping in Figure 18 ...
... In some cases, you need to filter data based on one or more conditions before writing it to targets. For example, if you have a human resources data warehouse containing information about current employees, you might want to filter out employees who are part-time and hourly. The mapping in Figure 18 ...
National Licensing and Local Impact: Getting
... than offset by increased costs for systems, license administration, cataloguing, information services ...
... than offset by increased costs for systems, license administration, cataloguing, information services ...
System design for integration of fault Oscar Tholander
... architectural style and also look into how these kinds of systems can be developed using the .NET 4.0 Framework, Windows Communication Foundation (WCF) and EntityFramework 4.0. The thesis will in detail go through how to design the database abstraction to transferring the database content over a net ...
... architectural style and also look into how these kinds of systems can be developed using the .NET 4.0 Framework, Windows Communication Foundation (WCF) and EntityFramework 4.0. The thesis will in detail go through how to design the database abstraction to transferring the database content over a net ...
Database model
A database model is a type of data model that determines the logical structure of a database and fundamentally determines in which manner data can be stored, organized, and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.