On Line Analytic Processing (OLAP)
... The functions stored in a star database represent information about the application being modelled. By combining these functions we can derive new information about the application from the information already stored. This is done using the following operations: projection composition pairing ...
... The functions stored in a star database represent information about the application being modelled. By combining these functions we can derive new information about the application from the information already stored. This is done using the following operations: projection composition pairing ...
MYCH4
... All of these operations take two input relations, which must be union-compatible: Same number of fields. `Corresponding’ fields have the same type. What is the schema of result? ...
... All of these operations take two input relations, which must be union-compatible: Same number of fields. `Corresponding’ fields have the same type. What is the schema of result? ...
The rational interrelationships within databases base on tables
... SQL syntax are non-case sensitive−select, drop, insert and delete in the above student records (see Table 2 and 3). For data manipulation, sorting and filtering could be used to query the number of students who got A’s in the class(see Table 3). Sorting or filtering down, it could be used to f ...
... SQL syntax are non-case sensitive−select, drop, insert and delete in the above student records (see Table 2 and 3). For data manipulation, sorting and filtering could be used to query the number of students who got A’s in the class(see Table 3). Sorting or filtering down, it could be used to f ...
SQL
... • Use uppercase characters for all keywords • Capitalize all table names and objects • Use lowercase characters for all column names and variables ...
... • Use uppercase characters for all keywords • Capitalize all table names and objects • Use lowercase characters for all column names and variables ...
MIS515.6b
... between one class and another. (one-to-one, one-to-many, many-to-many) An association class is a class that represents a relationship and stores the attributes of that relationship. Generalization relationships show a generalization hierarchy from the class diagram. Key attributes are not required i ...
... between one class and another. (one-to-one, one-to-many, many-to-many) An association class is a class that represents a relationship and stores the attributes of that relationship. Generalization relationships show a generalization hierarchy from the class diagram. Key attributes are not required i ...
Attribute Data and Relational Database
... small relational tables To reduce data redundancy, remove multiple values in one cells in a table, and To make efficient data storage and management possible ...
... small relational tables To reduce data redundancy, remove multiple values in one cells in a table, and To make efficient data storage and management possible ...
Exec Circle - BSC - BDM Presentation
... Each column in a table that is not a determiner of the contents of another column must itself be a function of the other columns in the table For example, in a table with three columns containing customer ID, product sold, and price of the product when sold, the price would be a function of the cust ...
... Each column in a table that is not a determiner of the contents of another column must itself be a function of the other columns in the table For example, in a table with three columns containing customer ID, product sold, and price of the product when sold, the price would be a function of the cust ...
Relational Algebra and Calculus
... – Schemas of input relations for a query are fixed (but query will run regardless of instance!) – The schema for the result of a given query is also fixed! Determined by definition of query language ...
... – Schemas of input relations for a query are fixed (but query will run regardless of instance!) – The schema for the result of a given query is also fixed! Determined by definition of query language ...
Database Systems Session 2 – Main Theme Relational Data Model
... single (possibly physically distributed) database system We start with a very simple example to introduce some concepts and issues to address We look at only a very small part of information of the type that an enterprise may need to keep We need some way of describing sample data We will th ...
... single (possibly physically distributed) database system We start with a very simple example to introduce some concepts and issues to address We look at only a very small part of information of the type that an enterprise may need to keep We need some way of describing sample data We will th ...
Relational Algebra and Calculus
... Comes in two flavors: Tuple relational calculus (TRC) and Domain relational calculus (DRC). Calculus has variables, constants, comparison ops, logical connectives and quantifiers. ...
... Comes in two flavors: Tuple relational calculus (TRC) and Domain relational calculus (DRC). Calculus has variables, constants, comparison ops, logical connectives and quantifiers. ...
slides - UCLA Computer Science
... SQL permits the user to specify where they should occur by using nulls first or nulls last, for instance select student-id, rank ( ) over (order by marks desc nulls last) as s-rank from student-marks ...
... SQL permits the user to specify where they should occur by using nulls first or nulls last, for instance select student-id, rank ( ) over (order by marks desc nulls last) as s-rank from student-marks ...
Database Systems: Design, Implementation, and Management
... • Used when tables have no common attributes • Returns only rows that meet the join condition – Typically includes equality comparison expression of two columns ...
... • Used when tables have no common attributes • Returns only rows that meet the join condition – Typically includes equality comparison expression of two columns ...
Final Jeopardy game
... SQL for 30 Q: The order of the columns returned by a SQL SELECT statement are determined by the: a.) ORDER BY clause. b.) SORT BY clause. c.) order they are listed in following SELECT. d.) order they are listed in following WHERE. e.) order they are listed in following FROM. ...
... SQL for 30 Q: The order of the columns returned by a SQL SELECT statement are determined by the: a.) ORDER BY clause. b.) SORT BY clause. c.) order they are listed in following SELECT. d.) order they are listed in following WHERE. e.) order they are listed in following FROM. ...
Access Queries - University of Nevada, Reno
... Example: City Parameter query in Panorama database. ...
... Example: City Parameter query in Panorama database. ...
Chapter 17: Parallel Databases
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
Document
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
Document
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
... Pi,j computes the join of ri with sj. In order to do so, ri is replicated to Pi,0, Pi,1, ..., Pi,m-1, while si is replicated to P0,i, P1,i, ..., Pn-1,i ...
Slides
... Entries in columns are from the same set of values Each row is unique The sequence of columns can be interchanged without changing the meaning or use of the relation The rows may be interchanged or stored in any ...
... Entries in columns are from the same set of values Each row is unique The sequence of columns can be interchanged without changing the meaning or use of the relation The rows may be interchanged or stored in any ...
Object Oriented Database
... A Water Resource Management example A database of state wide water projects Includes a library of picture slides ...
... A Water Resource Management example A database of state wide water projects Includes a library of picture slides ...
Relational Algebra - LeMoyne
... All of these operations take two input relations, which must be union-compatible: Same number of fields. `Corresponding’ fields have the same type. What is the schema of result? ...
... All of these operations take two input relations, which must be union-compatible: Same number of fields. `Corresponding’ fields have the same type. What is the schema of result? ...