Concurrency Control Chapter Handbook of Database Technology
... to define Conflict Equivalence between a history H and a serial history S(H) is the ability to find a series of commutes of adjoining operations in H to generate S(H). So why do we define Conflicting Operations as we do? First, we note that we can never commute two operations of a single transaction ...
... to define Conflict Equivalence between a history H and a serial history S(H) is the ability to find a series of commutes of adjoining operations in H to generate S(H). So why do we define Conflicting Operations as we do? First, we note that we can never commute two operations of a single transaction ...
JDBC notes
... authorID and lastName from table authors ensures that the columns will appear in the result with authorID as the first column and lastName as the second column. Programs typically process result columns by specifying the column number in the result (starting from number 1 for the first column). Sele ...
... authorID and lastName from table authors ensures that the columns will appear in the result with authorID as the first column and lastName as the second column. Programs typically process result columns by specifying the column number in the result (starting from number 1 for the first column). Sele ...
professional profile
... One of the key experiences I have with GG is the real-time change data capture where I was able to grab specific data out of changing tables and load them into tables on other databases for business use. In addition I was able to take advantage of resource utilization by using GG to load and maintai ...
... One of the key experiences I have with GG is the real-time change data capture where I was able to grab specific data out of changing tables and load them into tables on other databases for business use. In addition I was able to take advantage of resource utilization by using GG to load and maintai ...
MYCH3
... Where do ICs Come From? ICs are based upon the semantics of the realworld enterprise that is being described in the database relations. We can check a database instance to see if an IC is violated, but we can NEVER infer that an IC is true by looking at an instance. ...
... Where do ICs Come From? ICs are based upon the semantics of the realworld enterprise that is being described in the database relations. We can check a database instance to see if an IC is violated, but we can NEVER infer that an IC is true by looking at an instance. ...
Application Context
... having which row groups to include in the cursor, if row grouping is being used, formatted as an SQL HAVING clause (excluding the HAVING itself). Passing null will cause all row groups to be included, and is required when row grouping is not being used. ...
... having which row groups to include in the cursor, if row grouping is being used, formatted as an SQL HAVING clause (excluding the HAVING itself). Passing null will cause all row groups to be included, and is required when row grouping is not being used. ...
Troubleshooting Oracle Publishers
... Transactional Replication for Oracle Oracle transactional publications are implemented using the transactional publishing architecture of SQL Server; however, changes are tracked using a combination of database triggers on the Oracle database and the Log Reader Agent. Subscribers to an Oracle transa ...
... Transactional Replication for Oracle Oracle transactional publications are implemented using the transactional publishing architecture of SQL Server; however, changes are tracked using a combination of database triggers on the Oracle database and the Log Reader Agent. Subscribers to an Oracle transa ...
The SQL Query Language
... Based on slides for Database Management Systems by R. Ramakrishnan and J. Gehrke ...
... Based on slides for Database Management Systems by R. Ramakrishnan and J. Gehrke ...
MYCH3
... Weak entity set and identifying relationship set are translated into a single table. When the owner entity is deleted, all owned weak entities must also be deleted. What guarantees existence of owner? ...
... Weak entity set and identifying relationship set are translated into a single table. When the owner entity is deleted, all owned weak entities must also be deleted. What guarantees existence of owner? ...
Slide 1
... Oracle In-Memory Database Cache Accelerator for Oracle Database Applications • Reduced response time and increased throughput for Oracle Database applications • Oracle Database tables cached in the application-tier – Groups of related tables – All or subset of rows and columns ...
... Oracle In-Memory Database Cache Accelerator for Oracle Database Applications • Reduced response time and increased throughput for Oracle Database applications • Oracle Database tables cached in the application-tier – Groups of related tables – All or subset of rows and columns ...
mobile computing and databases
... Views mobile transaction processing as a concurrency and cache coherency problem. A stationary database server dishes out the fragments of an object on a request from a Mobile Unit. On completion of the transaction, the Mobile Units return the fragments to the server. These fragments are put tog ...
... Views mobile transaction processing as a concurrency and cache coherency problem. A stationary database server dishes out the fragments of an object on a request from a Mobile Unit. On completion of the transaction, the Mobile Units return the fragments to the server. These fragments are put tog ...
Chapter 3 Effects of IT on Strategy and Competition
... • Data integrity: enable constraints or checks on data • Data dictionary: maintain information about database structure ...
... • Data integrity: enable constraints or checks on data • Data dictionary: maintain information about database structure ...
A Storage Advisor for Hybrid-Store Databases
... With the SAP HANA database, SAP offers a high-performance in-memory hybrid-store database. Hybrid-store databases—that is, databases supporting row- and column-oriented data management—are getting more and more prominent. While the columnar management offers high-performance capabilities for analyzi ...
... With the SAP HANA database, SAP offers a high-performance in-memory hybrid-store database. Hybrid-store databases—that is, databases supporting row- and column-oriented data management—are getting more and more prominent. While the columnar management offers high-performance capabilities for analyzi ...
databaseid_ch1.pdf
... The relational model also supports various kinds of keys. To begin with, every relation has at least one candidate key.* A candidate key is just a unique identifier; in other words, it’s a combination of attributes—often, but not always, a “combination” involving just one attribute—such that every t ...
... The relational model also supports various kinds of keys. To begin with, every relation has at least one candidate key.* A candidate key is just a unique identifier; in other words, it’s a combination of attributes—often, but not always, a “combination” involving just one attribute—such that every t ...
Slide 1
... A database’s design depends on how users view their business environment and how they do their jobs. Database developers do not and cannot know what to include because they don’t work with the data everyday. They must rely on users to tell them what data are important and how they’re used. ...
... A database’s design depends on how users view their business environment and how they do their jobs. Database developers do not and cannot know what to include because they don’t work with the data everyday. They must rely on users to tell them what data are important and how they’re used. ...
Relational Database (RDBMS via ODBC) Interface to the PI system
... The interface allows bi-directional transfer of data between the PI System and any relational database management system (RDBMS) that supports Open Database Connectivity (ODBC) drivers. The interface runs on Microsoft Windows (NT/2000) operating systems, and is able to connect to any PI Server node ...
... The interface allows bi-directional transfer of data between the PI System and any relational database management system (RDBMS) that supports Open Database Connectivity (ODBC) drivers. The interface runs on Microsoft Windows (NT/2000) operating systems, and is able to connect to any PI Server node ...
The What How and Why of RMAN
... group 1 (‘/testdb/redo01.arc’) size 100M reuse, group 2 (‘/testdb/redo01.arc’) size 100M reuse; transport tablespace lab tablespace destination '/tbs' auxiliary destination '/aux' until time 'sysdate-1'; recover tablespace users, tools auxiliary destination '/aux' until time 'sysdate-1'; ...
... group 1 (‘/testdb/redo01.arc’) size 100M reuse, group 2 (‘/testdb/redo01.arc’) size 100M reuse; transport tablespace lab tablespace destination '/tbs' auxiliary destination '/aux' until time 'sysdate-1'; recover tablespace users, tools auxiliary destination '/aux' until time 'sysdate-1'; ...
Implementing Oracle9i data Guard For Higher Availability
... Therefore, only local archive destination (log_archive_dest_1) is set to mandatory; the standby archive destination (log_archive_dest_2) is set to optional for LGWR process, with network transmission method of asynchronous and disk write option of no affirm. 8.The standby site is not using standby o ...
... Therefore, only local archive destination (log_archive_dest_1) is set to mandatory; the standby archive destination (log_archive_dest_2) is set to optional for LGWR process, with network transmission method of asynchronous and disk write option of no affirm. 8.The standby site is not using standby o ...
No Slide Title
... Experience-based Reality Check Protocol and Functional Specification v1.1 documents are forward looking in places, but the non-required features are not identified as such in the documents. Functional Specifications, i.e., requirements, are cast in Jell-o, not concrete. Expect rework due to chan ...
... Experience-based Reality Check Protocol and Functional Specification v1.1 documents are forward looking in places, but the non-required features are not identified as such in the documents. Functional Specifications, i.e., requirements, are cast in Jell-o, not concrete. Expect rework due to chan ...
Chapter 4: SQL
... • Null values are allowed in all the domain types. • Declaring an attribute to be not null prohibits null values for that attribute. • create domain person-name char(20) not null ...
... • Null values are allowed in all the domain types. • Declaring an attribute to be not null prohibits null values for that attribute. • create domain person-name char(20) not null ...
Document
... • Null values are allowed in all the domain types. • Declaring an attribute to be not null prohibits null values for that attribute. • create domain person-name char(20) not null ...
... • Null values are allowed in all the domain types. • Declaring an attribute to be not null prohibits null values for that attribute. • create domain person-name char(20) not null ...
Part
... The executeBatch() method returns an array of counts, each of which counts the number of rows affected by the SQL command. The first count returns 0 because it is a DDL command. The other counts return 1 because only one row is affected. NOTE: To find out whether a driver supports batch updates, inv ...
... The executeBatch() method returns an array of counts, each of which counts the number of rows affected by the SQL command. The first count returns 0 because it is a DDL command. The other counts return 1 because only one row is affected. NOTE: To find out whether a driver supports batch updates, inv ...
Working with Databases in PHP
... Returns 0 if no ID was generated, false on error Works only for AUTO_INCREMENT columns $link can be omitted if only one link established mysql_query ("insert into people ("name", ...
... Returns 0 if no ID was generated, false on error Works only for AUTO_INCREMENT columns $link can be omitted if only one link established mysql_query ("insert into people ("name", ...
Storing OWL Ontologies in SQL Relational Databases
... map to any foreign key, because creating two foreign keys for the relationship would mean a circular dependency.) Rule 5: If an object property is single-valued and Rule 4 is not applied (a zero-or-one-to-one, one-to-one or many-to-one relationship), then the object property maps to a foreign key in ...
... map to any foreign key, because creating two foreign keys for the relationship would mean a circular dependency.) Rule 5: If an object property is single-valued and Rule 4 is not applied (a zero-or-one-to-one, one-to-one or many-to-one relationship), then the object property maps to a foreign key in ...