9781111969608_PPT_ch11
... SQL Parsing Phase (cont’d.) • Query optimizer analyzes SQL query and finds most efficient way to access data – Validated for syntax compliance – Validated against data dictionary • Tables and column names are correct • User has proper access rights ...
... SQL Parsing Phase (cont’d.) • Query optimizer analyzes SQL query and finds most efficient way to access data – Validated for syntax compliance – Validated against data dictionary • Tables and column names are correct • User has proper access rights ...
JDBC and Database Programming in Java - CS
... What's the column's normal max width in chars? What's the suggested column title for use in printouts and displays? What's a column's number of decimal digits? Does a column's case matter? Is the column a cash value? Will a write on the column definitely succeed? Can you put a NULL in this column? I ...
... What's the column's normal max width in chars? What's the suggested column title for use in printouts and displays? What's a column's number of decimal digits? Does a column's case matter? Is the column a cash value? Will a write on the column definitely succeed? Can you put a NULL in this column? I ...
Starting with Java Persistence Architecture
... object with the data associated with a primary key is simplified down to a request that this entity manger “find” that object – one line of code rather than an entire procedure that runs a query and processes the results in the ResultSet. The “entity manager” must of course be supplied with data ide ...
... object with the data associated with a primary key is simplified down to a request that this entity manger “find” that object – one line of code rather than an entire procedure that runs a query and processes the results in the ResultSet. The “entity manager” must of course be supplied with data ide ...
DBC-e03-PP-Chapter-01
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
DBC-e03-Chapter-01-PP
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
... • In a list, each row may contain information on more than one theme. As a result, needed information may appear in the lists only if information on other themes is also present – For Example: A list of Projects may include Project Manager information (Name, ID, and Phone Extension) and Project info ...
CS6302-DBMS_Notes - e
... Consider a program to transfer $50 from account A to account B. If a system failure occurs during the execution of the program, it is possible that the $50 was removed from account A but was not credited to account B, resulting in an inconsistent database state. ...
... Consider a program to transfer $50 from account A to account B. If a system failure occurs during the execution of the program, it is possible that the $50 was removed from account A but was not credited to account B, resulting in an inconsistent database state. ...
introductory database concepts
... • Rule 6: View Updating Rule. Data can be presented to the user in different logical combinations, called views. Each view should support the same full range of data manipulation that direct-access to a table has available. In practice, providing update and delete access to logical views is difficul ...
... • Rule 6: View Updating Rule. Data can be presented to the user in different logical combinations, called views. Each view should support the same full range of data manipulation that direct-access to a table has available. In practice, providing update and delete access to logical views is difficul ...
Understanding Computers, Chapter 14
... 1. Which type of database system is beginning to be used in high-end systems where performance is crucial? a. In-memory databases b. Disk-based databases c. Single-user databases 2. True or False: With the n-tier database model, there is at least one middle piece of software between the client and t ...
... 1. Which type of database system is beginning to be used in high-end systems where performance is crucial? a. In-memory databases b. Disk-based databases c. Single-user databases 2. True or False: With the n-tier database model, there is at least one middle piece of software between the client and t ...
databases
... Stores long text entriesup to 64,000 characters long (the equivalent of 18 pages of text!). Use memo fields to store notes or anything else that requires a lot of space. ...
... Stores long text entriesup to 64,000 characters long (the equivalent of 18 pages of text!). Use memo fields to store notes or anything else that requires a lot of space. ...
Querying XML Databases
... Native XML Database (NXD) • Native XML databases have an XML-based internal model, i.e., their fundamental unit of storage is XML. • To enable Oxygen XML to use a database, you need to download the database's .jar files and then point Oxygen to them. • For instructions on configuring each database, ...
... Native XML Database (NXD) • Native XML databases have an XML-based internal model, i.e., their fundamental unit of storage is XML. • To enable Oxygen XML to use a database, you need to download the database's .jar files and then point Oxygen to them. • For instructions on configuring each database, ...
A Methodology of A Database Schema Design Using
... A general solution of the implicational problem in the presence of different constraint types is very hard to find, if even possible. Testing the satisfaction of the formal consistency may be relaxed by considering the implicational problem for various constraint types separately. We believe that th ...
... A general solution of the implicational problem in the presence of different constraint types is very hard to find, if even possible. Testing the satisfaction of the formal consistency may be relaxed by considering the implicational problem for various constraint types separately. We believe that th ...
2_Oracle OCP Admin Exam
... datafiles on disk. By default, checkpoints happen once every log switch, but can happen more often, depending on the values set for LOG_CHECKPOINT_INTERVAL or LOG_CHECKPOINT_TIMEOUT. These two parameters allow for transaction volume-based or time-based checkpoint intervals. Data Concurrency and Stat ...
... datafiles on disk. By default, checkpoints happen once every log switch, but can happen more often, depending on the values set for LOG_CHECKPOINT_INTERVAL or LOG_CHECKPOINT_TIMEOUT. These two parameters allow for transaction volume-based or time-based checkpoint intervals. Data Concurrency and Stat ...
Introduction to SQL : Structured Query Language : EDUGRABS : http
... 2. Well Defined Standards Exist - SQL Databases use long-established standard, which is being adopted by ANSI and ISO. Non SQL databases do not adhere to any clear standard. 3. SQL as a language is independent of the way it is independent of the way it is implemented internally. A quey returns the s ...
... 2. Well Defined Standards Exist - SQL Databases use long-established standard, which is being adopted by ANSI and ISO. Non SQL databases do not adhere to any clear standard. 3. SQL as a language is independent of the way it is independent of the way it is implemented internally. A quey returns the s ...
Architecture of Transaction Processing Systems
... enters information in textboxes and then submits a request for service by making an appropriate click. Presentation services recognizes the click, and it calls application services to satisfy the request, passing to it the information that has been input . Application services checks the integrity c ...
... enters information in textboxes and then submits a request for service by making an appropriate click. Presentation services recognizes the click, and it calls application services to satisfy the request, passing to it the information that has been input . Application services checks the integrity c ...
6 ER2RDM_Mapping
... will be mapped to its own table. This is not
true in the first case.
• If you create the ManagedBy table from the very beginning
it will be there when you need it.
• A little more work up front saves a lot of work later on.
• You can show off later on by saying “It will only take a
seco ...
...
JDBC basics lecture
... multiple SQL insert, update, and delete statements are completed as a single unit. Either all of the statements in the unit complete successfully, or none of the changes are applied. ...
... multiple SQL insert, update, and delete statements are completed as a single unit. Either all of the statements in the unit complete successfully, or none of the changes are applied. ...
Document
... • Perform sensitivity testing – In programs, ignore missing data unless the value is significant Triggers can be used to perform these operations ...
... • Perform sensitivity testing – In programs, ignore missing data unless the value is significant Triggers can be used to perform these operations ...
as a PDF
... be shared, in part or in whole, among a number of labels. In addition, multiple edges may connect the same pair of nodes with overlapping or redundant labels. Requiring labels to contain disjoint descriptions would be an unnecessary restriction. Multiple properties in a label can capture more data s ...
... be shared, in part or in whole, among a number of labels. In addition, multiple edges may connect the same pair of nodes with overlapping or redundant labels. Requiring labels to contain disjoint descriptions would be an unnecessary restriction. Multiple properties in a label can capture more data s ...
Winisis 1 - CIDBIMENA
... pluginDLL. The DLL will automatically check for incompatibilities. For instance, if DLL version 3 does not support version 1 commands, it returns a plugin registration error. But eventually version 4 does support version 1 commands and proceeds with the registration successfully. The following are t ...
... pluginDLL. The DLL will automatically check for incompatibilities. For instance, if DLL version 3 does not support version 1 commands, it returns a plugin registration error. But eventually version 4 does support version 1 commands and proceeds with the registration successfully. The following are t ...
Concurrency Control
... • Basic idea is to keep older version of data items around. • When a transaction requires access to an item, an appropriate version is chosen to maintain serializability, if possible. • Some read operations that would be rejected by other techniques can still be accepted by reading an older version ...
... • Basic idea is to keep older version of data items around. • When a transaction requires access to an item, an appropriate version is chosen to maintain serializability, if possible. • Some read operations that would be rejected by other techniques can still be accepted by reading an older version ...
lecture slides - Database Group
... all attributes of both R and S – for every pair of tuples r from R and s from S there is a result tuple that consists of r and s – if both R and S have an attribute A then rename to R.A and S.A ...
... all attributes of both R and S – for every pair of tuples r from R and s from S there is a result tuple that consists of r and s – if both R and S have an attribute A then rename to R.A and S.A ...
Backup and Recovery
... Redo log files, which were active or current at the time of the crash are read and changes from them are applied to the data files This phase is called rolling forward phase ...
... Redo log files, which were active or current at the time of the crash are read and changes from them are applied to the data files This phase is called rolling forward phase ...
Chapter 1 - Eastern Illinois University
... database to store tables of customer records, corresponding sales orders, product parts, and employee lists. Various workers can then use the database to efficiently perform their jobs. For example, salespeople can quickly enter or look up sales orders, advertising executives can study and forecast ...
... database to store tables of customer records, corresponding sales orders, product parts, and employee lists. Various workers can then use the database to efficiently perform their jobs. For example, salespeople can quickly enter or look up sales orders, advertising executives can study and forecast ...
Database Connections with ASP.Net
... Database Connections with ASP.Net Connection Pooling Acquiring a connection takes a short, but definite, amount of time. In a web application in which requests are being handled efficiently, connections will be opened and closed endlessly as new requests are processed. In this environment, the smal ...
... Database Connections with ASP.Net Connection Pooling Acquiring a connection takes a short, but definite, amount of time. In a web application in which requests are being handled efficiently, connections will be opened and closed endlessly as new requests are processed. In this environment, the smal ...