Cross Joins & Self Joins - Volume 16

Curriculum Design and Instruction To Teach

The Fundamentals Of Structured Query

Language (SQL): Cross Joins and Self Joins:

Volume 16:



Author: Charles Hayes:


SQL commonly expanded as Structured Query

Language, is a computer language designed

for the retrieval and management of data in

relational database management systems,

database schema creation and modification,

and database object access control management.

SQL has been standardized by both ANSI and ISO.






Special Features Include:


Phases For Conducting A Needs Assessment:

Curriculum Design Supplement:

Curriculum Design Plan:

Lesson Plans:

Test:

Instructional Goals:

Instructional Objectives:

Instructional Activities:

Instructional Evaluation Techniques:

Standard Vocabulary:

A Limited Glimpse:



Topics Include:

@. Cross joins and Self Joins:

A. Introduction:

1. Cross Joins:

A. Definition of a cross join:

B. Why are corss joins important?

C. An inner join is derived from

a cross join:

D. The properties of an inner join:

E. An error in the join condition can

appear to be a cross join:

F. Using a cross join to list all the

possible combinations:

G. Avoid a cross join of large tables:

2. Self Joins:

A. Why join a table with itself:

B. An example of a self join:

C. Generating the numbers from 0 to 999:

D. Numbering the lines of a report in

Oracle and Access:

3. Summary:


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