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Minor updates to Chapters 2 and 3 code files.

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This commit is contained in:
anthonydb 2020-05-15 14:16:56 -04:00
parent 7189b2c405
commit b1c0a13dfc
2 changed files with 15 additions and 6 deletions
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6
Chapter_02/Chapter_02.sql
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@ -1,9 +1,9 @@
-------------------------------------------------------------- ---------------------------------------------------------------------------
-- Practical SQL: A Beginner's Guide to Storytelling with Data -- Practical SQL: A Beginner's Guide to Storytelling with Data, 2nd Edition
-- by Anthony DeBarros -- by Anthony DeBarros
-- Chapter 2 Code Examples -- Chapter 2 Code Examples
-------------------------------------------------------------- ----------------------------------------------------------------------------
-- Listing 2-1: Creating a database named analysis -- Listing 2-1: Creating a database named analysis

15
Chapter_03/Chapter_03.sql
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@ -1,9 +1,9 @@
-------------------------------------------------------------- ---------------------------------------------------------------------------
-- Practical SQL: A Beginner's Guide to Storytelling with Data -- Practical SQL: A Beginner's Guide to Storytelling with Data, 2nd Edition
-- by Anthony DeBarros -- by Anthony DeBarros
-- Chapter 3 Code Examples -- Chapter 3 Code Examples
-------------------------------------------------------------- ----------------------------------------------------------------------------
-- Listing 3-1: Querying all rows and columns from the teachers table -- Listing 3-1: Querying all rows and columns from the teachers table
@ -96,6 +96,15 @@ FROM teachers
WHERE school = 'F.D. Roosevelt HS' WHERE school = 'F.D. Roosevelt HS'
AND (salary < 38000 OR salary > 40000); AND (salary < 38000 OR salary > 40000);
-- Note how the results change if we omit parentheses. That's
-- because the AND operator takes precedence over OR and is
-- evaluated first:
SELECT *
FROM teachers
WHERE school = 'F.D. Roosevelt HS'
AND salary < 38000 OR salary > 40000;
-- Listing 3-10: A SELECT statement including WHERE and ORDER BY -- Listing 3-10: A SELECT statement including WHERE and ORDER BY
SELECT first_name, last_name, school, hire_date, salary SELECT first_name, last_name, school, hire_date, salary