CS-8: Database Systems
... Sort the data in descending order of Salary and Commission. Query to display Name of all the employees where the third letter of their name is ‘A’. Query to display Name of all employees either have two ‘R’s or have two ‘A’s in their name and are either in Dept No = 30 or their Manger’s Employee No ...
... Sort the data in descending order of Salary and Commission. Query to display Name of all the employees where the third letter of their name is ‘A’. Query to display Name of all employees either have two ‘R’s or have two ‘A’s in their name and are either in Dept No = 30 or their Manger’s Employee No ...
original - Kansas State University
... Drop and Alter Table Constructs: Review The drop table command deletes all information about the dropped relation from the database. The alter table command is used to add attributes to an existing relation: alter table r add A D where A is the name of the attribute to be added to relation r an ...
... Drop and Alter Table Constructs: Review The drop table command deletes all information about the dropped relation from the database. The alter table command is used to add attributes to an existing relation: alter table r add A D where A is the name of the attribute to be added to relation r an ...
Performance Tradeoffs in Read-Optimized Databases
... While column-oriented systems often have their own sets of column-wise operators that can provide additional performance benefit to column stores [1], we focus in this paper on the differences between column and row stores related solely to the way data is stored on disk. To this end, we implement b ...
... While column-oriented systems often have their own sets of column-wise operators that can provide additional performance benefit to column stores [1], we focus in this paper on the differences between column and row stores related solely to the way data is stored on disk. To this end, we implement b ...
SQL Tuning - Ohio Oracle Users Group
... • Oracle’s Technet – Database Performance Tuning Guide & Reference http://otn.oracle.com/docs/products/oracle9i/doc_library/relea se2/server.920/a96533/toc.htm ...
... • Oracle’s Technet – Database Performance Tuning Guide & Reference http://otn.oracle.com/docs/products/oracle9i/doc_library/relea se2/server.920/a96533/toc.htm ...
Introduction to Software Engineering
... First course in databases Fundamental concepts of database management Aspects of Database design Aspects of Database languages Some aspects of Database-system implementation Concepts and algorithms in a general setting that is not tied to one particular database system ...
... First course in databases Fundamental concepts of database management Aspects of Database design Aspects of Database languages Some aspects of Database-system implementation Concepts and algorithms in a general setting that is not tied to one particular database system ...
ppt - DUET
... other users permission to access and update data in a view or table. The owner must explicitly grant necessary privileges to others, as by default the owner has all privileges and others have none. ...
... other users permission to access and update data in a view or table. The owner must explicitly grant necessary privileges to others, as by default the owner has all privileges and others have none. ...
DEPARTMENTS - Kuliah Online Unikom
... • The database is based on the object relational database management system. • Relational databases are composed of relations, managed by relational operations, and governed by data integrity constraints. • With the Oracle server, you can store and manage information by using the SQL language and PL ...
... • The database is based on the object relational database management system. • Relational databases are composed of relations, managed by relational operations, and governed by data integrity constraints. • With the Oracle server, you can store and manage information by using the SQL language and PL ...
MS SQL SERVER 7.0
... complicated queries required by Decision Support System (DSS) . Improved query support for the new Micro Soft OLAP services. New Data Transformation Services (DTS) to facilitate transfer of data between SQL server and other databases…... ...
... complicated queries required by Decision Support System (DSS) . Improved query support for the new Micro Soft OLAP services. New Data Transformation Services (DTS) to facilitate transfer of data between SQL server and other databases…... ...
Chapter 1: Introduction
... values(?,?,?,?)”; pStmt.setString(1, “88877”); pStmt.setString(2, “Perry”); pStmt.setString(3, “Finance”); pStmt.setInt(4, 125000); pStmt.executeUpdate( ); pStmt.setString(1, “88878”); pStmt.executeUpdate( ); In this example, we prepare an insert statement, and actually insert ...
... values(?,?,?,?)”; pStmt.setString(1, “88877”); pStmt.setString(2, “Perry”); pStmt.setString(3, “Finance”); pStmt.setInt(4, 125000); pStmt.executeUpdate( ); pStmt.setString(1, “88878”); pStmt.executeUpdate( ); In this example, we prepare an insert statement, and actually insert ...
Entity-relationship model - Department of Computer Science
... We wish to create a database for a company that runs training courses. For this, we must store data about the trainees and the instructors. For each course participant (about 5,000), identified by a code, we want to store her social security number, surname, age, sex, place of birth, employer’s name ...
... We wish to create a database for a company that runs training courses. For this, we must store data about the trainees and the instructors. For each course participant (about 5,000), identified by a code, we want to store her social security number, surname, age, sex, place of birth, employer’s name ...
slides (6pp)
... ”SELECT code, name, period, teacher ” + ”FROM Courses, GivenCourses ” + ”WHERE code = course ” + ”ORDER BY code, period”); Compare with previous row to see if this is a new course. String currentCourse, course; If it is, print its name. while (rs.next()) { course = rs.getString(1); if (!course.equal ...
... ”SELECT code, name, period, teacher ” + ”FROM Courses, GivenCourses ” + ”WHERE code = course ” + ”ORDER BY code, period”); Compare with previous row to see if this is a new course. String currentCourse, course; If it is, print its name. while (rs.next()) { course = rs.getString(1); if (!course.equal ...
Database Modeling in UML
... be instantiated as any object in the hierarchy. The dependencies between columns can become quite complicated. In addition, an update to any class in the hierarchy will potentially impact every other class in the hierarchy, as columns are added, deleted or modified from the table. The second option ...
... be instantiated as any object in the hierarchy. The dependencies between columns can become quite complicated. In addition, an update to any class in the hierarchy will potentially impact every other class in the hierarchy, as columns are added, deleted or modified from the table. The second option ...
Discovering the Semantics of Relational Tables through Mappings *
... tables (such as hasSsn(x1 , ssn)) and the obvious foreign key constraints from binary to unary tables, then one could in fact try to apply directly the Clio algorithm to the problem. The desired mapping formula from Example 1.1 would not be produced for several reasons: (i) Clio [18] works by taking ...
... tables (such as hasSsn(x1 , ssn)) and the obvious foreign key constraints from binary to unary tables, then one could in fact try to apply directly the Clio algorithm to the problem. The desired mapping formula from Example 1.1 would not be produced for several reasons: (i) Clio [18] works by taking ...
ConQuer: Efficient Management of Inconsistent Databases
... The query constraints are that orderkey should be the key of relation order, and custkey should be the key of relation customer. We will consider the database of Figure 2, where both relations are inconsistent with respect to the query constraints. The consistent query answers for q2 on the database ...
... The query constraints are that orderkey should be the key of relation order, and custkey should be the key of relation customer. We will consider the database of Figure 2, where both relations are inconsistent with respect to the query constraints. The consistent query answers for q2 on the database ...
Section 2
... degree to which individual DBMSs can operate independently. • The distribution dimension deals with data. There are only two possibilities: data is distributed across multiple sites, or is stored at a single site. • Heterogeneity can occur in various forms: hardware, networking protocols, variations ...
... degree to which individual DBMSs can operate independently. • The distribution dimension deals with data. There are only two possibilities: data is distributed across multiple sites, or is stored at a single site. • Heterogeneity can occur in various forms: hardware, networking protocols, variations ...
Effective Use of SQL in SAS Programming
... SAS uses SQL in two different ways – Where statement and Proc SQL. Where statement is one of the most commonly used SAS statements. The concept and syntax, however, were originally adopted from SQL - this is one example that SAS is a powerful language that imports and mixes syntax from other languag ...
... SAS uses SQL in two different ways – Where statement and Proc SQL. Where statement is one of the most commonly used SAS statements. The concept and syntax, however, were originally adopted from SQL - this is one example that SAS is a powerful language that imports and mixes syntax from other languag ...
