Curriculum Design and Instruction To Teach
The Fundamentals Of Structured Query
Language (SQL): Union and Union All:
Volume 15:
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:
@. Union and Union All:
A. Introduction:
1. Unions:
A. The difference between a
union and a join:
B. Union all:
C. The select statements within
a union:
D. The order by clause in a union:
E. Creating a table or view that includes
a union:
F. Automatic datatype conversion
in a union:
2. Unconventional Unions:
A. A union of tables with different
datatypes:
B. A union of two tables with different
numbers of
columns:
3. Applications of a Union:
A. Determining if two tables are
identical:
B. Using a literal in a union to
identify the source of the data:
C. Attaching messages to flag exceptions
warning, and errors:
D. Dividing data from one column into
two different columns:
E. Applying two functions to different
parts of the data:
F. A union of three or more tables:
4. Set Intersection and Set differnece
in Oracle:
A. Set intersection:
B. Ser difference:
5. Summary:
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