Continuous integration for databases using Redgate tools
... deployment therefore rely on creating upgrade scripts specifically for that purpose. The lack of database source code makes it more complicated to maintain a current stable version in source control. Creation and migration scripts can be checked into the source control repository, but despite its im ...
... deployment therefore rely on creating upgrade scripts specifically for that purpose. The lack of database source code makes it more complicated to maintain a current stable version in source control. Creation and migration scripts can be checked into the source control repository, but despite its im ...
Python MySQL Database Access
... Once our database connection is established, you are ready to make a query into this database. You can use either fetchone method to fetch single record or fetchall method to fetech multiple values from a database table. fetchone: It fetches the next row of a query result set. A result set is an obj ...
... Once our database connection is established, you are ready to make a query into this database. You can use either fetchone method to fetch single record or fetchall method to fetech multiple values from a database table. fetchone: It fetches the next row of a query result set. A result set is an obj ...
- Courses - University of California, Berkeley
... database, DA and DBA are responsible for developing procedures that ensure the integrity and security of the database during the update process. • Specific responsibility for data collection, editing and verification must be assigned • Quality assurance must be practiced to protect and audit the dat ...
... database, DA and DBA are responsible for developing procedures that ensure the integrity and security of the database during the update process. • Specific responsibility for data collection, editing and verification must be assigned • Quality assurance must be practiced to protect and audit the dat ...
Proceedings of USITS ’03: 4th USENIX Symposium on Internet Technologies and Systems
... 1-copy serializability – stems the challenge addressed by this paper. Lazy replication algorithms asynchronously propagate replica updates to other nodes, possibly even after the updating transaction commits. They do not provide 1-copy serializability, since, for instance, writes may be propagated i ...
... 1-copy serializability – stems the challenge addressed by this paper. Lazy replication algorithms asynchronously propagate replica updates to other nodes, possibly even after the updating transaction commits. They do not provide 1-copy serializability, since, for instance, writes may be propagated i ...
here
... tables must be joined back together • In a relational database, tables are joined together using the value of the data • If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to retrieve specific customer information from ...
... tables must be joined back together • In a relational database, tables are joined together using the value of the data • If a PROJECT has a CUSTOMER, the Customer_ID is stored as a column in the PROJECT table. The value stored in this column can be used to retrieve specific customer information from ...
Database transaction
... Database transaction is an important concept to understand while working in database and SQL. Transaction in database is required to protect data and keep it consistent when multiple users access the database at same time. What is transaction in database? Database transaction is collection of SQL qu ...
... Database transaction is an important concept to understand while working in database and SQL. Transaction in database is required to protect data and keep it consistent when multiple users access the database at same time. What is transaction in database? Database transaction is collection of SQL qu ...
Welcome! [www.web
... Although second on the list, the last term of an ACID transaction to consider is consistent. A transaction ensures consistency if it is atomic, isolated, and durable. If an airplane possesses 10 seats and each seat sells for $100, then at the end of 10 successful transactions the airline's account s ...
... Although second on the list, the last term of an ACID transaction to consider is consistent. A transaction ensures consistency if it is atomic, isolated, and durable. If an airplane possesses 10 seats and each seat sells for $100, then at the end of 10 successful transactions the airline's account s ...
Chapter 21:Application Development and Administration
... Use stored-procedures: avoids re-parsing and re-optimization of query ...
... Use stored-procedures: avoids re-parsing and re-optimization of query ...
Chapter 1: Introduction
... (called change or delta relations) and having a separate process that applies the changes over to a replica There are better ways of doing these now: Databases today provide built in materialized view facilities to automatically maintain summary data Databases provide built-in support for repl ...
... (called change or delta relations) and having a separate process that applies the changes over to a replica There are better ways of doing these now: Databases today provide built in materialized view facilities to automatically maintain summary data Databases provide built-in support for repl ...
Chapter 1 - Eastern Illinois University
... security, availability, windows2000 integration, Internet content management, ecommerce integration, packaged applications and business intelligence. Oracle announced its release of Oracle10g in 2003. Most of the fanfare on this release centers on the grid capabilities of Oracle’s latest offering ( ...
... security, availability, windows2000 integration, Internet content management, ecommerce integration, packaged applications and business intelligence. Oracle announced its release of Oracle10g in 2003. Most of the fanfare on this release centers on the grid capabilities of Oracle’s latest offering ( ...
CHAPTER 2
... are used to build a data warehouse. In the first approach, the data warehouse first builds for the complete organisation and from this selects the information needed for different end-users. In the “bottom up” approach, the smaller local data warehouse, known as a datamart, is used by end-users at a ...
... are used to build a data warehouse. In the first approach, the data warehouse first builds for the complete organisation and from this selects the information needed for different end-users. In the “bottom up” approach, the smaller local data warehouse, known as a datamart, is used by end-users at a ...
Logical structure of a transaction
... – Cannot Query/Write, and then Re-Query in the same transaction, since the simulation results are not in the DB yet. – The endorser/committer architecture cannot prevent phantom reads, therefore this solution can only be used by applications not sensitive to phantom reads • A phantom read occurs whe ...
... – Cannot Query/Write, and then Re-Query in the same transaction, since the simulation results are not in the DB yet. – The endorser/committer architecture cannot prevent phantom reads, therefore this solution can only be used by applications not sensitive to phantom reads • A phantom read occurs whe ...
SQL Server 2005
... • Not all SQL Server objects are automatically copied • Users must exit for next log to be applied ...
... • Not all SQL Server objects are automatically copied • Users must exit for next log to be applied ...
PGS99
... Figure 1: Deferred update technique The certi cation test aims at ensuring one-copy serializability. It decides to abort a transaction if the transaction's commit would lead the database to an inconsistent state (i.e., nonserializable). For example, consider two concurrent transactions, ta and tb , ...
... Figure 1: Deferred update technique The certi cation test aims at ensuring one-copy serializability. It decides to abort a transaction if the transaction's commit would lead the database to an inconsistent state (i.e., nonserializable). For example, consider two concurrent transactions, ta and tb , ...
Database Access and Integration Services on the Grid
... coordination of accesses to one or more databases. As service definitions essentially state what functionality is to be supported, and not how that functionality is provided, a single service may come to be implemented in different ways. This, for example, allows alternative implementations with dif ...
... coordination of accesses to one or more databases. As service definitions essentially state what functionality is to be supported, and not how that functionality is provided, a single service may come to be implemented in different ways. This, for example, allows alternative implementations with dif ...
Performance evaluation of parallel transaction processing in shared
... Manipulation Language) statements submitted to the back-end system may originate directly from the end-user (ad-hoc queries) or from application programs running on workstations or mainframes. Some database machines (e.g. EDS) support the management of application programs (consisting of multiple DM ...
... Manipulation Language) statements submitted to the back-end system may originate directly from the end-user (ad-hoc queries) or from application programs running on workstations or mainframes. Some database machines (e.g. EDS) support the management of application programs (consisting of multiple DM ...
TransactionsAndRecovery
... existing customer number and existing part numbers The books balance (debits = credits, assets = liabilities) Consistency preservation is a property of a transaction, not of the database mechanisms for controlling it (unlike the A, I, and D of ACID) If each transaction maintains consistency, then ...
... existing customer number and existing part numbers The books balance (debits = credits, assets = liabilities) Consistency preservation is a property of a transaction, not of the database mechanisms for controlling it (unlike the A, I, and D of ACID) If each transaction maintains consistency, then ...
Chapter 1: Introduction
... begin atomic insert into orders (select item, level from reorder where reorder.item = orow.item) end ...
... begin atomic insert into orders (select item, level from reorder where reorder.item = orow.item) end ...
Transaction Management in .Net.doc
... Concurrency controls in a database system ensure that two users cannot change the same data, or that one user cannot change a piece of data before another user is done with it. For example, if you are talking to an airline ticket agent to reserve the last available seat on a flight and the agent beg ...
... Concurrency controls in a database system ensure that two users cannot change the same data, or that one user cannot change a piece of data before another user is done with it. For example, if you are talking to an airline ticket agent to reserve the last available seat on a flight and the agent beg ...
IST 274 -10 Database Administrator
... •When using SYS to connect as SYSDBA, you will need to use a special password (not CHANGE_ON_INSTALL) •An INTERNAL connection also requires this password •The “Special” password is held encrypted in a password file (PWD.ORA) by the operating
system
•Oracle provides a utility (ORAPWD) that creat ...
... •When using SYS to connect as SYSDBA, you will need to use a special password (not CHANGE_ON_INSTALL) •An INTERNAL connection also requires this password •The “Special” password is held encrypted in a password file (PWD
Parsing a SAS Database for Correctness: A Conceptual Introduction
... In a clinical database environment, it is common to have 20-50 SAS datasets all linked by a common identifier, as well as secondary keys. One can view the inter-record relationships as a data structure having a tree-shaped geometry. After the initial entry of data, records in each dataset are in con ...
... In a clinical database environment, it is common to have 20-50 SAS datasets all linked by a common identifier, as well as secondary keys. One can view the inter-record relationships as a data structure having a tree-shaped geometry. After the initial entry of data, records in each dataset are in con ...
PPT
... Also supports metadata retrieval, such as querying about relations present in the database and the names and types of relation attributes ...
... Also supports metadata retrieval, such as querying about relations present in the database and the names and types of relation attributes ...
Flashback Technologies
... Flashback Query. Query values in a table at a point in time. select * from rays.VIMPORTANTDATA as of timestamp to_timestamp('25-FEB-2010 08:10:00', 'DD-MON-YYYY HH24:MI:SS'); ...
... Flashback Query. Query values in a table at a point in time. select * from rays.VIMPORTANTDATA as of timestamp to_timestamp('25-FEB-2010 08:10:00', 'DD-MON-YYYY HH24:MI:SS'); ...
An Architecture for Homogenizing Federated Databases
... portion of all the IS resources. Lack of documentation, inflexibility in the design, poor performance, inappropriate functionality all attribute to the high cost. The lack of understanding of a legacy IS also makes it difficult for organizations to take full advantage of newer technologies, such as ...
... portion of all the IS resources. Lack of documentation, inflexibility in the design, poor performance, inappropriate functionality all attribute to the high cost. The lack of understanding of a legacy IS also makes it difficult for organizations to take full advantage of newer technologies, such as ...