SQL - La Salle University
... Advantage – can be used to encapsulate an entire business transaction – group statements together as a transaction and don’t let them be separated Advantage – code resides at the DB and is executed at the DB – less communication – faster processing ...
... Advantage – can be used to encapsulate an entire business transaction – group statements together as a transaction and don’t let them be separated Advantage – code resides at the DB and is executed at the DB – less communication – faster processing ...
Maintaining Database Integrity with Refinement Types
... This section fleshes out the architecture diagram of our system. Section 2.1 describes the details of the SQL schemas input by our system, including both the data definition part defining the structure of tables, and also the data manipulation part of queries invoked from stored procedures. Section ...
... This section fleshes out the architecture diagram of our system. Section 2.1 describes the details of the SQL schemas input by our system, including both the data definition part defining the structure of tables, and also the data manipulation part of queries invoked from stored procedures. Section ...
Musician
... case studies. They will assist in tackling the SQL guides & case studies and are provided as part of the Database & SQL lecture booklet. Scm-Intranet ...
... case studies. They will assist in tackling the SQL guides & case studies and are provided as part of the Database & SQL lecture booklet. Scm-Intranet ...
RDBMS - E
... In other words an attribute or a combination of attribute that identifies the record uniquely but none of its proper subsets can identify the records uniquely. E.g. of Candidate Key 1 Code 2 Name, Address For above table we have only two Candidate Keys (i.e. Irreducible Super Key) used to identify t ...
... In other words an attribute or a combination of attribute that identifies the record uniquely but none of its proper subsets can identify the records uniquely. E.g. of Candidate Key 1 Code 2 Name, Address For above table we have only two Candidate Keys (i.e. Irreducible Super Key) used to identify t ...
Weak Entity Sets
... attributes that distinguishes among all the entities of a weak entity set. The primary key of a weak entity set is formed by the primary key of the ...
... attributes that distinguishes among all the entities of a weak entity set. The primary key of a weak entity set is formed by the primary key of the ...
PHP connectivity
... Disconnect from Database Free query results mysql_free_result(qresult); ...
... Disconnect from Database Free query results mysql_free_result(qresult); ...
SQLScript Guide SAP - SCN Wiki
... its documentation for any purposes is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. Hewlett-Packard Company makes no representations about the suitability of ...
... its documentation for any purposes is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. Hewlett-Packard Company makes no representations about the suitability of ...
Relationship Sets
... 1. each A entity is associated with a unique entity from B and C or 2. each pair of entities from (A, B) is associated with a unique C entity, and each pair (A, C) is associated with a unique B Each alternative has been used in different formalisms To avoid confusion we outlaw more than one ...
... 1. each A entity is associated with a unique entity from B and C or 2. each pair of entities from (A, B) is associated with a unique C entity, and each pair (A, C) is associated with a unique B Each alternative has been used in different formalisms To avoid confusion we outlaw more than one ...
Advanced Database Systems
... Chapter 3: The relational model The things we have seen here are part of the basic database course and are assumed to be understood. If unsure, check the slides and read: Sec 3.1 Sec 3.2 Sec 3.3 (except 3.3.1) Sec 3.4 (as a warm-up for the querying part) Sec 3.6 Sec 3.7 In particular, make sure you ...
... Chapter 3: The relational model The things we have seen here are part of the basic database course and are assumed to be understood. If unsure, check the slides and read: Sec 3.1 Sec 3.2 Sec 3.3 (except 3.3.1) Sec 3.4 (as a warm-up for the querying part) Sec 3.6 Sec 3.7 In particular, make sure you ...
Object Database Semantics: the Stack
... – Classical query operators, such as selection, projection, joins and quantifiers, can be generally and precisely specified – Updating constructs, programming abstractions, database abstractions, strong typing, etc. can be expressed in terms of abstract implementation. K.Subieta. ODB Semantics: SBA, ...
... – Classical query operators, such as selection, projection, joins and quantifiers, can be generally and precisely specified – Updating constructs, programming abstractions, database abstractions, strong typing, etc. can be expressed in terms of abstract implementation. K.Subieta. ODB Semantics: SBA, ...
SQL Overview , Oracle Data Type , DDL and Constraints
... to this column. This means that the field will be saved with a NULL value. • NULL values are treated differently from other values. • NULL is used as a placeholder for unknown or inapplicable values. • Note: It is not possible to compare NULL and 0; they are not equivalent. • It is not possible to t ...
... to this column. This means that the field will be saved with a NULL value. • NULL values are treated differently from other values. • NULL is used as a placeholder for unknown or inapplicable values. • Note: It is not possible to compare NULL and 0; they are not equivalent. • It is not possible to t ...
Using SQL in an Application - Computer Science, Stony Brook
... Updatable Current row of an updatable result set can be changed or deleted, or a new row can be inserted. Any such change causes changes to the underlying database table res.updateString ( Name , John ); // change the attribute Name of // current row in the row buffer. res.updateRow ( ); // install ...
... Updatable Current row of an updatable result set can be changed or deleted, or a new row can be inserted. Any such change causes changes to the underlying database table res.updateString ( Name , John ); // change the attribute Name of // current row in the row buffer. res.updateRow ( ); // install ...
Oracle PL/SQL
... system memory when a SQL statement is executed. – A cursor contains information on a select statement and the rows of data accessed by it. This temporary work area is used to store the data retrieved from the database, and manipulate this data. – A cursor can hold more than one row, but can process ...
... system memory when a SQL statement is executed. – A cursor contains information on a select statement and the rows of data accessed by it. This temporary work area is used to store the data retrieved from the database, and manipulate this data. – A cursor can hold more than one row, but can process ...
Performance Modeling and Access Methods for Temporal
... time-varying aspects of the real world. The need for temporal support has been recognized for over ten years, and recent progress in secondary storage technology is making such support practically feasible. There are three distinct kinds of time in databases: transaction time, valid time, and user-d ...
... time-varying aspects of the real world. The need for temporal support has been recognized for over ten years, and recent progress in secondary storage technology is making such support practically feasible. There are three distinct kinds of time in databases: transaction time, valid time, and user-d ...
A Generic Provenance Middleware for Database Queries, Updates
... underlying database supports time travel, i.e., we can retrieve a past version of a relation and 2) the database keeps a log of executed SQL statements (the aforementioned audit log). We require the audit log to contain at least the following information for each executed statement: an identifier fo ...
... underlying database supports time travel, i.e., we can retrieve a past version of a relation and 2) the database keeps a log of executed SQL statements (the aforementioned audit log). We require the audit log to contain at least the following information for each executed statement: an identifier fo ...
Lecture5
... to this column. This means that the field will be saved with a NULL value. • NULL values are treated differently from other values. • NULL is used as a placeholder for unknown or inapplicable values. • Note: It is not possible to compare NULL and 0; they are not equivalent. • It is not possible to t ...
... to this column. This means that the field will be saved with a NULL value. • NULL values are treated differently from other values. • NULL is used as a placeholder for unknown or inapplicable values. • Note: It is not possible to compare NULL and 0; they are not equivalent. • It is not possible to t ...
Configuring SQL Server Agent
... The sp_update_operator system-stored procedure is used to modify the properties of existing operators Accepts the same parameters as the sp_add_operator procedure but requires that the name parameter be a valid existing operator The sp_help_operator system-stored procedure is used to return in ...
... The sp_update_operator system-stored procedure is used to modify the properties of existing operators Accepts the same parameters as the sp_add_operator procedure but requires that the name parameter be a valid existing operator The sp_help_operator system-stored procedure is used to return in ...
Design and Implementation of a Metadata
... metadata-rich file systems does not require extra directory objects. Whenever convenient we will refer to a file with children as “directory”. Links can also respresent any kind of relationship that is not necessarily hierarchical, such as provenance, temporal locality, hyperlinks, and bibliographic ...
... metadata-rich file systems does not require extra directory objects. Whenever convenient we will refer to a file with children as “directory”. Links can also respresent any kind of relationship that is not necessarily hierarchical, such as provenance, temporal locality, hyperlinks, and bibliographic ...
ppt
... uniquely the value for another set of attributes. A functional dependency is a generalization of the notion of a key. ...
... uniquely the value for another set of attributes. A functional dependency is a generalization of the notion of a key. ...
erwin Data Modeler Data Modeling Overview Guide
... distributed materials (hereinafter referred to as the “Documentation”), is for your informational purposes only and is subject to change or withdrawal by erwin Inc. at any time. This Documentation is proprietary information of erwin Inc. and may not be copied, transferred, reproduced, disclosed, mod ...
... distributed materials (hereinafter referred to as the “Documentation”), is for your informational purposes only and is subject to change or withdrawal by erwin Inc. at any time. This Documentation is proprietary information of erwin Inc. and may not be copied, transferred, reproduced, disclosed, mod ...
Ontology Based Query Answering: The Story So Far
... relations between the concepts and roles in the data source, and possibly extending the vocabulary with additional terms. Then one can query the data using the extended vocabulary, and taking into account all the relations implied by the ontology. This is essentially the idea underlying Ontology Bas ...
... relations between the concepts and roles in the data source, and possibly extending the vocabulary with additional terms. Then one can query the data using the extended vocabulary, and taking into account all the relations implied by the ontology. This is essentially the idea underlying Ontology Bas ...