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Chapter 8 copy edit updates

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anthonydb 2021-08-15 15:47:57 -04:00
parent 65bdcfaecc
commit 3f5e161682
1 changed files with 12 additions and 10 deletions
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Chapter_08/Chapter_08.sql
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@ -26,6 +26,8 @@ CREATE TABLE natural_key_example (
);
-- Listing 8-2: Example of a primary key violation
-- Note: You will need to create the natural_key_example table
-- using either of the two statements in Listing 8-1.
INSERT INTO natural_key_example (license_id, first_name, last_name)
VALUES ('T229901', 'Gem', 'Godfrey');
@ -44,13 +46,13 @@ CREATE TABLE natural_key_composite_example (
-- Listing 8-4: Example of a composite primary key violation
INSERT INTO natural_key_composite_example (student_id, school_day, present)
VALUES(775, '1/22/2022', 'Y');
VALUES(775, '2022-01-22', 'Y');
INSERT INTO natural_key_composite_example (student_id, school_day, present)
VALUES(775, '1/23/2022', 'Y');
VALUES(775, '2022-01-23', 'Y');
INSERT INTO natural_key_composite_example (student_id, school_day, present)
VALUES(775, '1/23/2022', 'N');
VALUES(775, '2022-01-23', 'N');
-- Listing 8-5: Declaring a bigint column as a surrogate key using IDENTITY
@ -68,7 +70,7 @@ VALUES ('Beachball Polish', '2020-03-15 09:21-07'),
SELECT * FROM surrogate_key_example;
-- Listing 8-6:
-- Listing 8-6: Restarting an IDENTITY sequence
INSERT INTO surrogate_key_example
OVERRIDING SYSTEM VALUE
@ -101,12 +103,12 @@ INSERT INTO licenses (license_id, first_name, last_name)
VALUES ('T229901', 'Steve', 'Rothery');
INSERT INTO registrations (registration_id, registration_date, license_id)
VALUES ('A203391', '3/17/2022', 'T229901');
VALUES ('A203391', '2022-03-17', 'T229901');
INSERT INTO registrations (registration_id, registration_date, license_id)
VALUES ('A75772', '3/17/2022', 'T000001');
VALUES ('A75772', '2022-03-17', 'T000001');
-- Listing 8-8: CHECK constraint examples
-- Listing 8-8: Examples of CHECK constraints
CREATE TABLE check_constraint_example (
user_id bigint GENERATED ALWAYS AS IDENTITY,
@ -124,7 +126,7 @@ VALUES ('admin');
INSERT INTO check_constraint_example (salary)
VALUES (-10000);
-- Listing 8-9: UNIQUE constraint example
-- Listing 8-9: A UNIQUE constraint example
CREATE TABLE unique_constraint_example (
contact_id bigint GENERATED ALWAYS AS IDENTITY,
@ -144,7 +146,7 @@ VALUES ('Betty', 'Diaz', 'bdiaz@example.org');
INSERT INTO unique_constraint_example (first_name, last_name, email)
VALUES ('Sasha', 'Lee', 'slee@example.org');
-- Listing 8-10: NOT NULL constraint example
-- Listing 8-10: A NOT NULL constraint example
CREATE TABLE not_null_example (
student_id bigint GENERATED ALWAYS AS IDENTITY,
@ -194,6 +196,6 @@ WHERE street = '52 STREET';
EXPLAIN ANALYZE SELECT * FROM new_york_addresses
WHERE street = 'ZWICKY AVENUE';
-- Listing 8-14: Creating a B-Tree index on the new_york_addresses table
-- Listing 8-14: Creating a B-tree index on the new_york_addresses table
CREATE INDEX street_idx ON new_york_addresses (street);