Caching Management of Mobile DBMS
... new attributes into an existing cache relation, use UPDATE command in SQL to insert values for the new attributes of the cache relation. Note that one base relation can only produce one cache relation and more attributes can be added into the cache relation later. A cache relation will not be split ...
... new attributes into an existing cache relation, use UPDATE command in SQL to insert values for the new attributes of the cache relation. Note that one base relation can only produce one cache relation and more attributes can be added into the cache relation later. A cache relation will not be split ...
Chapter 1:
... Also describes the way in which you can query it to access information about the database structure ...
... Also describes the way in which you can query it to access information about the database structure ...
II. Types of SQL Injection Attacks
... database and information of the column field. C. Union Queries This attack uses the “UNION” operator, which performs union between two or more SQL queries. As a result of this attack, database returns a dataset which is union of the results of original query and the injected query. An example is sho ...
... database and information of the column field. C. Union Queries This attack uses the “UNION” operator, which performs union between two or more SQL queries. As a result of this attack, database returns a dataset which is union of the results of original query and the injected query. An example is sho ...
Module 1: Introduction
... finds any name element anywhere under the /university-3 element, regardless of the element in which it is contained. A step in the path can go to parents, siblings, ancestors and descendants of the nodes generated by the previous step, not just to the children “//”, described above, is a short ...
... finds any name element anywhere under the /university-3 element, regardless of the element in which it is contained. A step in the path can go to parents, siblings, ancestors and descendants of the nodes generated by the previous step, not just to the children “//”, described above, is a short ...
Reengineering of Database Applications to EJB based Architecture
... By viewing EJBs as wrappers that represent the object views for the underlying database systems, the translation of a query to the EJB client code can be formulated as the query rewriting problem, a problem that has been widely studied [26][25]. Likewise, the EJB generation from legacy queries can b ...
... By viewing EJBs as wrappers that represent the object views for the underlying database systems, the translation of a query to the EJB client code can be formulated as the query rewriting problem, a problem that has been widely studied [26][25]. Likewise, the EJB generation from legacy queries can b ...
Document
... 4. Commuting with : If the selection condition c involves only those attributes A1, …, An in the projection list, the two operations can be commuted: A1, …, An(c(R) c(A1, …, An(R)) ...
... 4. Commuting with : If the selection condition c involves only those attributes A1, …, An in the projection list, the two operations can be commuted: A1, …, An(c(R) c(A1, …, An(R)) ...
Triggers - Department Of Computing
... Whenever some details for an employee are deleted or updated, both the previous and new details are recorded in an audit table to allow tracing the history of changes. An insert operation cannot be recorded with this trigger as old.empno has no value. ...
... Whenever some details for an employee are deleted or updated, both the previous and new details are recorded in an audit table to allow tracing the history of changes. An insert operation cannot be recorded with this trigger as old.empno has no value. ...
ppt - CSE, IIT Bombay
... To check if a functional dependency holds (or, in other words, is in F+), just check if +. ...
... To check if a functional dependency holds (or, in other words, is in F+), just check if +. ...
Lecture 5: Active Databases
... Whenever some details for an employee are deleted or updated, both the previous and new details are recorded in an audit table to allow tracing the history of changes. An insert operation cannot be recorded with this trigger as old.empno has no value. ...
... Whenever some details for an employee are deleted or updated, both the previous and new details are recorded in an audit table to allow tracing the history of changes. An insert operation cannot be recorded with this trigger as old.empno has no value. ...
Module 1: Introduction
... Example: Declare branch_name as the primary key for branch and ensure that the values of assets are non-negative. create table branch ...
... Example: Declare branch_name as the primary key for branch and ensure that the values of assets are non-negative. create table branch ...
Progressive Optimization in a Shared-Nothing
... database partition where the join operation takes place. If not, the data must be transferred from one partition to the designated joining partition. This movement of data is accomplished by means of a table queue, which is a logical data pipe for transferring table rows among database partitions. B ...
... database partition where the join operation takes place. If not, the data must be transferred from one partition to the designated joining partition. This movement of data is accomplished by means of a table queue, which is a logical data pipe for transferring table rows among database partitions. B ...
On Scaling Up Sensitive Data Auditing
... Section 1 discusses the prior work in data auditing. In this section, we discuss other related work. A body of work that is related to ours is the work on data provenance and causality [5, 17, 11, 13]. The notion of an indispensable record that we use is similar to the notion of a counterfactual re ...
... Section 1 discusses the prior work in data auditing. In this section, we discuss other related work. A body of work that is related to ours is the work on data provenance and causality [5, 17, 11, 13]. The notion of an indispensable record that we use is similar to the notion of a counterfactual re ...
Introduction to Data Modeling
... An important aspect of most every business is record keeping. In our information society, this has become an important aspect of business, and much of the world's computing power is dedicated to maintaining and using databases. Databases of all kinds pervade almost every business. All kinds of data, ...
... An important aspect of most every business is record keeping. In our information society, this has become an important aspect of business, and much of the world's computing power is dedicated to maintaining and using databases. Databases of all kinds pervade almost every business. All kinds of data, ...
Chapter 1
... - The WHERE clause could specify more than one row of the table - The DROP Command - To delete whose databases or complete tables DROP (TABLE | DATABASE) [IF EXISTS] name DROP TABLE IF EXISTS States ...
... - The WHERE clause could specify more than one row of the table - The DROP Command - To delete whose databases or complete tables DROP (TABLE | DATABASE) [IF EXISTS] name DROP TABLE IF EXISTS States ...
Accessing Your Databases with the SAS System
... Another fonn of this command, LIST VIEW. can be used in the view descriptor code to list all the database columns from the access descriptor that will be used in the view. Its output is identical to the LIST ALL, with the exception that only those columns used in the view are displayed, and" SELECTE ...
... Another fonn of this command, LIST VIEW. can be used in the view descriptor code to list all the database columns from the access descriptor that will be used in the view. Its output is identical to the LIST ALL, with the exception that only those columns used in the view are displayed, and" SELECTE ...
The Vertica Analytic Database: C-Store 7 Years Later
... and subsets of the table columns are allowed. Because Vertica is a column store and has been optimized so heavily for performance, it is NOT required to have one projection for each predicate that a user might restrict. In practice, most customers have one super projection (described below) and betw ...
... and subsets of the table columns are allowed. Because Vertica is a column store and has been optimized so heavily for performance, it is NOT required to have one projection for each predicate that a user might restrict. In practice, most customers have one super projection (described below) and betw ...
Exam Review - Oracle Academy
... 4. Which of the following are TRUE about SQL statements? T____a. SELECT or select can be used to name columns F____b. All keywords such as ORDER BY and DESCENDING can be abbreviated. For example ORDER BY can be abbreviated as ORD BY, and DESCENDING can be abbreviated as DESC. F____c. Separate lines ...
... 4. Which of the following are TRUE about SQL statements? T____a. SELECT or select can be used to name columns F____b. All keywords such as ORDER BY and DESCENDING can be abbreviated. For example ORDER BY can be abbreviated as ORD BY, and DESCENDING can be abbreviated as DESC. F____c. Separate lines ...
here. - NYU Computer Science
... • NOTE: this means a pair of entity sets can have at most one relationship in a particular relationship set. • E.g. if we wish to track all access-dates to each account by each ...
... • NOTE: this means a pair of entity sets can have at most one relationship in a particular relationship set. • E.g. if we wish to track all access-dates to each account by each ...
SQL
... DECLARE will declare a variable, giving it a name and a type. The SET statement can be used to provide a value, and the variable may be used in a statement by referencing its name. The following script declares a variable as an integer, initializes it, then uses WHILE to execute a loop. ...
... DECLARE will declare a variable, giving it a name and a type. The SET statement can be used to provide a value, and the variable may be used in a statement by referencing its name. The following script declares a variable as an integer, initializes it, then uses WHILE to execute a loop. ...
Special Interest Activity - School of Information Technology
... Introduction to ULDBs and the Trio System. IEEE Data Engineering Bulletin, Special Issue on Probabilistic Databases, 29(1):5-16, March ...
... Introduction to ULDBs and the Trio System. IEEE Data Engineering Bulletin, Special Issue on Probabilistic Databases, 29(1):5-16, March ...