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Python GUI Programming with Tkinter
book

Python GUI Programming with Tkinter

by Alan D. Moore
May 2018
Beginner to intermediate content levelBeginner to intermediate
452 pages
11h 26m
English
Packt Publishing
Content preview from Python GUI Programming with Tkinter

The lab_checks table

The lab_check table is an instance of a technician checking all the plots of a lab at a given time on a given date as shown in the following SQL query:

CREATE TABLE lab_checks(    date DATE NOT NULL, time TIME NOT NULL,     lab_id CHAR(1) NOT NULL REFERENCES labs(id),     lab_tech_id SMALLINT NOT NULL REFERENCES lab_techs(id),     PRIMARY KEY(date, time, lab_id));

The date, time, and lab_id columns together uniquely identify a lab check, and so we designate them the primary key columns. The ID of the lab technician performing the check is the lone attribute in this table. 

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Publisher Resources

ISBN: 9781788835886Supplemental Content