Extract Dependency - Script Update

Forgot to add extract_dependency to the sql scripts.

Working: #14

Author: OpenDataAlex

README.md

@@ -4,7 +4,10 @@ Data integration process management made easy!
 
 [![Coverage Status](https://coveralls.io/repos/github/OpenDataAlex/process_tracker_python/badge.svg?branch=master)](https://coveralls.io/github/OpenDataAlex/process_tracker_python?branch=master)
 [![Build Status](https://travis-ci.org/OpenDataAlex/process_tracker_python.svg?branch=master)](https://travis-ci.org/OpenDataAlex/process_tracker_python)
+[![Downloads](https://pepy.tech/badge/processtracker)](https://pepy.tech/project/processtracker)
+[![PyPI version](https://badge.fury.io/py/processtracker.svg)](https://badge.fury.io/py/processtracker)
 [![Code style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)
 
 This is the Python implementation of the ProcessTracker framework.  ProcessTracker builds a standard framework that is
 tool agnostic.  If you are working with data integration/cleansing processes within Python (i.e. using PySpark, Pandas, etc.)

dbscripts/mysql_process_tracker.sql

@@ -76,6 +76,18 @@ create index extract_status_id
 create index location_type
 	on location_lkup (location_type);
 
+create table process_tracker.extract_dependency
+(
+	parent_extract_id int not null,
+	child_extract_id int not null,
+	primary key (parent_extract_id, child_extract_id),
+	constraint extract_dependency_fk01
+		foreign key (parent_extract_id) references process_tracker.extract_tracking (extract_id),
+	constraint extract_dependency_fk02
+		foreign key (child_extract_id) references process_tracker.extract_tracking (extract_id)
+)
+comment 'Table tracking interdependencies between extract files.';
+
 create table process_status_lkup
 (
 	process_status_id int auto_increment

dbscripts/postgresql_process_tracker.sql

@@ -312,6 +312,22 @@ comment on column extract_tracking.extract_registration_date_time is 'The dateti
 
 alter table extract_tracking owner to pt_admin;
 
+create table process_tracking.extract_dependency
+(
+	parent_extract_id integer not null
+		constraint extract_dependency_fk01
+			references process_tracking.extract_tracking,
+	child_extract_id integer not null
+		constraint extract_dependency_fk02
+			references process_tracking.extract_tracking,
+	constraint extract_dependency_pk
+		primary key (parent_extract_id, child_extract_id)
+);
+
+comment on table process_tracking.extract_dependency is 'Table tracking interdependencies between extract files.';
+
+alter table process_tracking.extract_dependency owner to pt_admin;
+
 create table extract_process_tracking
 (
 	extract_tracking_id integer not null