Skip to main content

SQL Set Operators

SQL Set Operators   Traditional Set Operators: Union Compatibility:     Requirement for the traditional set operators.    Strong requirement.                         - Same number of columns.                         - Each corresponding column is compatible.                         - Positional correspondence.     Apply to similar tables by removing columns first. SQL UNION Example:           Example 1: Retrieve basic data about all university people.                     SELECT FacNo AS PerNo, FacFirstName                                      ...
Post a Comment

 b. List the plan number, line number, resource name, number of resources
( eventplanline.number ), location name, time start, and time end where the event is held at the basketball arena, the event plan has activity of activity of “Operation”, and the event plan has a work date in the period October 1 to December 31, 2018. Your query must not use the facility number (“F101”) of the basketball arena in the WHERE clause. Instead, you should use a condition on the FacName column for the value of “Basketball arena”.


Query Formulation + Result Snapshot











Our Official Website : Web Conquerors (https://www.webconquerors.com/) 

Want to get digital services? Contact US

Want to know about our services? Our Services


Comments

Post a Comment

Popular posts from this blog

SQL Set Operators

SQL Set Operators   Traditional Set Operators: Union Compatibility:     Requirement for the traditional set operators.    Strong requirement.                         - Same number of columns.                         - Each corresponding column is compatible.                         - Positional correspondence.     Apply to similar tables by removing columns first. SQL UNION Example:           Example 1: Retrieve basic data about all university people.                     SELECT FacNo AS PerNo, FacFirstName                                      ...
Post a Comment
Read more

Database Create Statements

University Database Create Statements :   DROP TABLE Enrollment; DROP TABLE offering; DROP TABLE Student; DROP TABLE Course; DROP TABLE Faculty;     -------------------- Student ------------------------   CREATE TABLE Student ( stdNo char(11) not null, stdFirstName varchar(30) not null, stdLastName varchar(30) not null, stdCity varchar(30) not null, stdState char(2) not null, stdZip char(10) not null, stdMajor char(6), stdClass char(2), stdGPA decimal(3,2), CONSTRAINT StudentPk PRIMARY KEY (StdNo) );     -------------------- Course ------------------------   CREATE TABLE Course ( CourseNo       char(6) not null, crsDesc        varchar(50) not null, CrsUnits       integer, CONSTRAINT CoursePK PRIMARY KEY (CourseNo) );     -------------------- Faculty ---------------------   CREAT...
Post a Comment
Read more

Database Three Level Architecture

  Database Three Level Architecture Objectives of Three-Level Architecture: All users  should be able to access same data but have a different customized view.  A user’s view is immune to changes made in other views Users should not need to know physical database storage details.  DBA should be able to change database storage structures without affecting the user’s view.  Internal structure of database should be un affected by changes to physical aspects of storage. DBA should be able to change conceptual structure of database without affecting all users ANSI-SPARC Three-Level Architecture: External Level: Users’ view of the database .  Describes that part of database that is relevant to a particular user. Different views may have different representation of same data (e.g. different date formats, age derived from DOB etc.) Conceptual Level: Community view of the database. Describes what data is stored in the database and the relationships among the data....
Post a Comment
Read more