7.1 Sql Special Operators
Autor: ferenc30 • February 23, 2016 • Research Paper • 657 Words (3 Pages) • 1,383 Views
SQL Textbook Questions – Selecting Columns
Using FireFox we will be running our queries in http://www.mcgoo.com.au/mcgoo_query/ .
When running queries on the ‘Repairs’ database, you need to click the database first to select it.
Chapter 7: Read the information on pages 1-5 – Introduction; The Repairs database revisited; SQL syntax; Selecting columns from a table.
# Note: The text book and the online database aren’t always identical, for example, the field name id# in the text book is called id_numb online. If you think your query is correct, but you are getting an error, check that you are using the correct field name by clicking on the table in McGoo Query. This will run a query that shows the entire table with its contents. You might also have to check that the data is the same. If the data is different to the textbook, modify your query so it works with the online data.
Activity 7.1 (1)
This activity asks you to enter and run each of the queries above to see if you get the same results. I have done these for you in the format that you will continue working with. Run these queries in McGoo Query making sure you get the same results.[pic 1]
[pic 2]
Technicians | idnumb | name | grade |
SQL diagram:
SQL Query: SELECT name, grade
FROM repairs_technicians
SQL results table:
name | grade |
Carrol | master |
Johnson | trade |
Hennesy | apprentice |
Carey | trade |
SQL diagram: [pic 3][pic 4]
Devices | type | rate | priority |
SQL Query: SELECT *
FROM repairs_devices
SQL results table:[pic 5]
[pic 6][pic 7]
Devices | type | rate | priority |
SQL diagram:
SQL Query: SELECT distinct rate
FROM repairs_devices
SQL results table:
[pic 8]
[pic 9]
SQL diagram:[pic 10]
repairs | job_numb | id_numb | type | owner | date | time | ready | cost |
=1470 |
SQL Query: SELECT job_numb, type
FROM repairs_repair
WHERE id_numb = 1470
SQL results table:
[pic 11]
[pic 12]
SQL diagram:[pic 13]
repairs | job_numb | id_numb | type | owner | date | time | ready | cost |
=”drive” |
SQL Query: SELECT owner, type, date
FROM repairs_repair
WHERE type = “drive”
SQL results table:
[pic 14]
SQL diagram:[pic 15][pic 16]
repairs | job_numb | id_numb | type | owner | date | time | ready | cost |
<= “2010-06-04” |
SQL Query: SELECT job_numb, owner
FROM repairs_repair
WHERE date <= “2010-06-04”
SQL results table:
[pic 17]
Complete the rest of Activity 7.1 questions
Activity 7.1 (2) – find the results for these from the tables in Appendix 1 first and then run in McGoo Query to check your results. (a) is done for you.
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