Introduction to GIS - University of Vermont
... that each pair of tables has a field in common, or “key”. In a relational database, the records are generally different in each table The advantages: each table can be prepared and maintained separately, tables can remain separate until a query requires connecting, or relating them, relationships ca ...
... that each pair of tables has a field in common, or “key”. In a relational database, the records are generally different in each table The advantages: each table can be prepared and maintained separately, tables can remain separate until a query requires connecting, or relating them, relationships ca ...
Chapter 15 - Emunix Emich
... Updating by multiple computers: allows multiple updates on the same data at multiple sites – Three types of distributed update conflict can occur: • Loss of uniqueness • Lost updates due to concurrent transactions • Updates of deleted data ...
... Updating by multiple computers: allows multiple updates on the same data at multiple sites – Three types of distributed update conflict can occur: • Loss of uniqueness • Lost updates due to concurrent transactions • Updates of deleted data ...
Introduction to Teradata RDBMS
... You need one floppy disk which contains licenses for all components you could install. Each component has one entry in the license txt file. If you are asked to choose ODBC or Teradata ODBC with DBQM enhanced version to install. Just forget it. In this case, you can not install DBQM_Admin, DBQM_Clie ...
... You need one floppy disk which contains licenses for all components you could install. Each component has one entry in the license txt file. If you are asked to choose ODBC or Teradata ODBC with DBQM enhanced version to install. Just forget it. In this case, you can not install DBQM_Admin, DBQM_Clie ...
Oracle 10g Database Administrator: Implementation and
... Searching for Invalidated Objects (continued) ...
... Searching for Invalidated Objects (continued) ...
Relational Algebra and Calculus
... A query is applied to relation instances, and the result of a query is also a relation instance. – Schemas of input relations for a query are fixed (but query will run regardless of instance!) – The schema for the result of a given query is also fixed! Determined by definition of query language ...
... A query is applied to relation instances, and the result of a query is also a relation instance. – Schemas of input relations for a query are fixed (but query will run regardless of instance!) – The schema for the result of a given query is also fixed! Determined by definition of query language ...
Retrieving Data from a Database
... In the last hour's example (Listing 13.1), you created a Recordset object using the Execute method of the Connection object. However, there are other possibilities to create and open a recordset. Listing 14.1 shows you how to use the Open method of the Recordset object to gain a recordset. Listing 1 ...
... In the last hour's example (Listing 13.1), you created a Recordset object using the Execute method of the Connection object. However, there are other possibilities to create and open a recordset. Listing 14.1 shows you how to use the Open method of the Recordset object to gain a recordset. Listing 1 ...
DBC-e03-Appenix-C-PP
... • A SQL view is a virtual table that is constructed from other tables or views • A view has no data of its own, but uses data stored in tables or other views • Views are created using SQL SELECT statements • Views are used in other SELECT statements just as if they were a table • The SQL statements ...
... • A SQL view is a virtual table that is constructed from other tables or views • A view has no data of its own, but uses data stored in tables or other views • Views are created using SQL SELECT statements • Views are used in other SELECT statements just as if they were a table • The SQL statements ...
Chapter 1: The Database Environment
... Initially, there were no databases or DataBase Management Systems (DBMS) Individual Applications were written to meet specific user needs (File Processing or Traditional File Processing Systems) ...
... Initially, there were no databases or DataBase Management Systems (DBMS) Individual Applications were written to meet specific user needs (File Processing or Traditional File Processing Systems) ...
R - VUB STAR lab
... If there is a chain of foreign-key dependencies across multiple relations, with on delete cascade specified for each dependency, a deletion or update at one end of the chain can propagate across the entire chain. If a cascading update to delete causes a constraint violation that cannot be handle ...
... If there is a chain of foreign-key dependencies across multiple relations, with on delete cascade specified for each dependency, a deletion or update at one end of the chain can propagate across the entire chain. If a cascading update to delete causes a constraint violation that cannot be handle ...
No Slide Title
... Hybrids (199 processed so far) - 160 at UCSB (All wire-bonded) - 126 TOB_P_4U (52 in modules) - 7 TOB_P_4D (3 in modules) - 7 TOB_P_6U (6 in modules) - 6 TOB_S_4U (0 in modules) - 8 TOB_S_4D (3 in modules) - 6 TEC (4 in modules) ...
... Hybrids (199 processed so far) - 160 at UCSB (All wire-bonded) - 126 TOB_P_4U (52 in modules) - 7 TOB_P_4D (3 in modules) - 7 TOB_P_6U (6 in modules) - 6 TOB_S_4U (0 in modules) - 8 TOB_S_4D (3 in modules) - 6 TEC (4 in modules) ...
Introduction to Structured Query Language
... l An empty field has a well defined value: null. Null is not the same as an empty string or zero—null is a distinct value. ...
... l An empty field has a well defined value: null. Null is not the same as an empty string or zero—null is a distinct value. ...
Presentation
... • BOTH row and column formats for same table • Simultaneously active and consistent • OLTP uses existing row format ...
... • BOTH row and column formats for same table • Simultaneously active and consistent • OLTP uses existing row format ...
Achievements and Weaknesses of Object
... The OODB model has an OID that it is automatically generated by the system and that guarantees uniqueness to each object. This, in addition to eliminating the need for user defined keys in the OODB model, has brought other advantages to OODBs: 1) the OID cannot be modified by the application; 2) as ...
... The OODB model has an OID that it is automatically generated by the system and that guarantees uniqueness to each object. This, in addition to eliminating the need for user defined keys in the OODB model, has brought other advantages to OODBs: 1) the OID cannot be modified by the application; 2) as ...
How In-Memory Affects Database Design
... • Using typical interpreted T-SQL • Most T-SQL will work with no change (you may need to add isolation level hints, particularly in explicit transaction) • A few Exceptions that will not work –TRUNCATE TABLE - This one is really annoying :) –MERGE (In-Mem table cannot be the target) –Cross Database ...
... • Using typical interpreted T-SQL • Most T-SQL will work with no change (you may need to add isolation level hints, particularly in explicit transaction) • A few Exceptions that will not work –TRUNCATE TABLE - This one is really annoying :) –MERGE (In-Mem table cannot be the target) –Cross Database ...
designing database
... Four key steps in logical database modeling and design: Develop a logical data model for each known user interface for the application using normalization principles. Combine normalized data requirements from all user interfaces into one consolidated logical database model (view integration). Tr ...
... Four key steps in logical database modeling and design: Develop a logical data model for each known user interface for the application using normalization principles. Combine normalized data requirements from all user interfaces into one consolidated logical database model (view integration). Tr ...
Chapter 9: Object-Relational Databases
... • Extend the relational data model by including object orientation and constructs to deal with added data types. • Allow attributes of tuples to have complex types, including non-atomic values such as nested relations. • Preserve relational foundations, in particular the declarative access to data, ...
... • Extend the relational data model by including object orientation and constructs to deal with added data types. • Allow attributes of tuples to have complex types, including non-atomic values such as nested relations. • Preserve relational foundations, in particular the declarative access to data, ...
ITEC101AccessLab9 - Gonzaga University Student Web Server
... however, query tables are not stored in the database. Instead, they are generated from one or more of the stored tables (in this case, just the Movie table). Next, we’ll look at the query’s Design View to see how it is set up to construct the tuples you see in Datasheet View. 14. Switch to Design Vi ...
... however, query tables are not stored in the database. Instead, they are generated from one or more of the stored tables (in this case, just the Movie table). Next, we’ll look at the query’s Design View to see how it is set up to construct the tuples you see in Datasheet View. 14. Switch to Design Vi ...
Change Management for SQL Server
... – What is SQL Server 2005 Express and how is it any different than the other versions of SQL 2005? – Where do I get my copy? – What is the general installation process? – How do I create a database, then the tables and code to support my application? – What are some of the basic administration tasks ...
... – What is SQL Server 2005 Express and how is it any different than the other versions of SQL 2005? – Where do I get my copy? – What is the general installation process? – How do I create a database, then the tables and code to support my application? – What are some of the basic administration tasks ...
Physics Database Service Status
... Security has many layers: – Oracle’s security checklist – Scan for weak or default passwords – Check for published info on the web also by other sites • ‘Social engineering’ is a threat for complex environments ...
... Security has many layers: – Oracle’s security checklist – Scan for weak or default passwords – Check for published info on the web also by other sites • ‘Social engineering’ is a threat for complex environments ...
slides for the first lecture
... • CS4321 is the practicum associated with CS4320 • Will actually build a “realistic” database system • C++ programming ...
... • CS4321 is the practicum associated with CS4320 • Will actually build a “realistic” database system • C++ programming ...
SQL Server Security for the Access Developer
... databases installed on the MABEL SQL Server instance. You must grant database access to the database (Northwind) listed as the default database. Every database user is automatically added to the public role (which is analogous to Everyone in Windows security, or the Users group in Access security). ...
... databases installed on the MABEL SQL Server instance. You must grant database access to the database (Northwind) listed as the default database. Every database user is automatically added to the public role (which is analogous to Everyone in Windows security, or the Users group in Access security). ...
Microsoft Jet Database Engine
The Microsoft Jet Database Engine is a database engine on which several Microsoft products have been built. A database engine is the underlying component of a database, a collection of information stored on a computer in a systematic way. The first version of Jet was developed in 1992, consisting of three modules which could be used to manipulate a database.Database connect for MicrosoftJET stands for Joint Engine Technology, sometimes being referred to as Microsoft JET Engine or simply Jet. Microsoft Access and Visual Basic use or have used Jet as their underlying database engine. It has since been superseded for general use, however, first by Microsoft Desktop Engine (MSDE), then later by SQL Server Express. For larger database needs, Jet databases can be upgraded (or, in Microsoft parlance, ""up-sized"") to Microsoft's flagship database product, SQL Server.However, this does not mean that a MS Jet (Red) database cannot match MS SQL Server in storage capacity. A 5 billion record MS Jet (Red) database with compression and encryption turned on requires about 1 terabyte of disk storage space, comprising hundreds of (*.mdb) files, each acting as partial table, and not as a database in itself.Over the years, Jet has become almost synonymous with Microsoft Access, to the extent that many people refer to a Jet database as an ""Access database"".