Techwave_2005_am18a_ASAInternals
... Specific CHECK constraint that is violated appears in error ...
... Specific CHECK constraint that is violated appears in error ...
Interacting with the Oracle Server
... • Database columns and identifiers should have distinct names • Syntax errors can arise because PL/SQL checks the database first or a column in the table • The names of local variables and formal parameters take precedence over the names of database tables • The names of database table columns take ...
... • Database columns and identifiers should have distinct names • Syntax errors can arise because PL/SQL checks the database first or a column in the table • The names of local variables and formal parameters take precedence over the names of database tables • The names of database table columns take ...
REVISING JOE`S DATABASE
... relationships have not been established. This process is called a join. Joins can combine any two tables as long as they have a common field. The common field does not have to be a foreign key but can be any field that exists in both tables. In fact, tables can be combined even if there is no common ...
... relationships have not been established. This process is called a join. Joins can combine any two tables as long as they have a common field. The common field does not have to be a foreign key but can be any field that exists in both tables. In fact, tables can be combined even if there is no common ...
Fundamentals of Relational Database Design
... The Penalties for Not Doing It Poor database performance Can’t write queries to get data the way you want it. Lots of extra work (code) to get reports they way you want. Always doing kludges to get around the design. When the customer wants to add one more of something, it’s a design change (“I nee ...
... The Penalties for Not Doing It Poor database performance Can’t write queries to get data the way you want it. Lots of extra work (code) to get reports they way you want. Always doing kludges to get around the design. When the customer wants to add one more of something, it’s a design change (“I nee ...
Chapter 7
... Associate Professor in Business Technology Management John Molson School of Business, Concordia University, Montréal ...
... Associate Professor in Business Technology Management John Molson School of Business, Concordia University, Montréal ...
Database2 Module Specification
... likelihood this will be difficult with SQLite3 in which case the native PHP support will be utilised. All SQL generation and handling of external libraries / native functions will be handled by a library within the module. In particular, this makes any future change easier (given the new db library ...
... likelihood this will be difficult with SQLite3 in which case the native PHP support will be utilised. All SQL generation and handling of external libraries / native functions will be handled by a library within the module. In particular, this makes any future change easier (given the new db library ...
Document
... and establish the primary keys as you designed them. Establish foreign keys as well. Test your design by doing some maintenance on your tables. Second task:Design and develop a set of tables for a payroll system using the criteria below. Set up the necessary tables for this database and populate the ...
... and establish the primary keys as you designed them. Establish foreign keys as well. Test your design by doing some maintenance on your tables. Second task:Design and develop a set of tables for a payroll system using the criteria below. Set up the necessary tables for this database and populate the ...
Slide 1
... previous slide -Contains a number of templates (we’re not using) but the Office button in the upper left hand corner is still the same Click on it to “open” an existing database ...
... previous slide -Contains a number of templates (we’re not using) but the Office button in the upper left hand corner is still the same Click on it to “open” an existing database ...
12. Recovery LECTURE - NDSU Computer Science
... Note: Since transactions are redone in commit-order = REDO-order, it must be the case that the Serial Order to which execution is equivalent is COMMIT order. That is, if another serial order is the order to which the serializability is equivalent, the REDO must be done in that order. In T2 and T4 ab ...
... Note: Since transactions are redone in commit-order = REDO-order, it must be the case that the Serial Order to which execution is equivalent is COMMIT order. That is, if another serial order is the order to which the serializability is equivalent, the REDO must be done in that order. In T2 and T4 ab ...
Chapter 2 Notes
... or, if it does not complete, it has no effect at all (aborts). – This is not true of ordinary programs. A hardware or software failure could leave files partially updated. ...
... or, if it does not complete, it has no effect at all (aborts). – This is not true of ordinary programs. A hardware or software failure could leave files partially updated. ...
Chapter 1
... catalog to reflect the inclusion of the new data item (i.e. column). Program-operation independence : User application programs can operate on the data by invoking operations through their names and arguments, regardless of how the operations are implemented. (ex) We don’t need to know the impleme ...
... catalog to reflect the inclusion of the new data item (i.e. column). Program-operation independence : User application programs can operate on the data by invoking operations through their names and arguments, regardless of how the operations are implemented. (ex) We don’t need to know the impleme ...
Access layer - WordPress.com
... modeled by a primary key that acts as a foreign key to another table. ...
... modeled by a primary key that acts as a foreign key to another table. ...
1. Introduction to Database Management System 3 hours
... Introduction to Database Management System, Brief History of Database Management Systems, Application Development without a Database, Advantages of the Database Management System Approach, Components of a Database Management System, Leading Commercial Databases 2. Designing a Database 5 hours Introd ...
... Introduction to Database Management System, Brief History of Database Management Systems, Application Development without a Database, Advantages of the Database Management System Approach, Components of a Database Management System, Leading Commercial Databases 2. Designing a Database 5 hours Introd ...
Manager Subordinate
... happens when we need to add or remove a subordinate?? We need to read and write the entire contents of the table.? That not a big deal in this situation, but what if one manager had one hundred employees??Also, it complicates the process of selecting data from the database in future queries. ...
... happens when we need to add or remove a subordinate?? We need to read and write the entire contents of the table.? That not a big deal in this situation, but what if one manager had one hundred employees??Also, it complicates the process of selecting data from the database in future queries. ...
The XPS Approach to Loading and Unloading Terabyte
... XPS (extended Parallel Server); Informix’s MPP solution, is designed to provide a solution to enterprise-wide database management, which not only includes the DBMS, but also scalable utilities. The focus of this talk will be our load/unload utility which is fast, flexible, scalable, and easy to use. ...
... XPS (extended Parallel Server); Informix’s MPP solution, is designed to provide a solution to enterprise-wide database management, which not only includes the DBMS, but also scalable utilities. The focus of this talk will be our load/unload utility which is fast, flexible, scalable, and easy to use. ...
Querying MS Access or any relational database…
... Get answers with queries(50 min): http://office.microsoft.com/enus/training/queries-i-get-answers-with-queries-RZ001077757.aspx ...
... Get answers with queries(50 min): http://office.microsoft.com/enus/training/queries-i-get-answers-with-queries-RZ001077757.aspx ...
CRSP SuRvivoR-biaS-fRee uS mutual fund databaSe July 2011 quarterly update
... release of the CRSP Survivor-Bias-Free US Mutual Fund Database, and contain data through June 2010. added funds This release also contains 224 inactive funds which have been re-added to the database as part of a cleanup project. These funds were in the pre-2008 CRSP database with liquidations a ...
... release of the CRSP Survivor-Bias-Free US Mutual Fund Database, and contain data through June 2010. added funds This release also contains 224 inactive funds which have been re-added to the database as part of a cleanup project. These funds were in the pre-2008 CRSP database with liquidations a ...
A Closer Look
... transactions must be the same as if they had executed serially (serializable) in some order. • Serializable has better performance than serial, but performance might still be inadequate. Database systems offer several isolation levels with different performance ...
... transactions must be the same as if they had executed serially (serializable) in some order. • Serializable has better performance than serial, but performance might still be inadequate. Database systems offer several isolation levels with different performance ...