From ebf825b448a11f047b529bdcc3af0aa71c400d74 Mon Sep 17 00:00:00 2001
From: Struchkov Mark <mark@struchkov.dev>
Date: Sun, 25 Sep 2022 09:30:41 +0300
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=B8=D0=BB=20SQ?=
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---
 sql/cascade-update.sql     | 14 +++++++++++++
 sql/create-many-to-one.sql | 41 ++++++++++++++++++++++++++++++++++++++
 sql/create-one-to-many.sql | 19 ++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 sql/cascade-update.sql
 create mode 100644 sql/create-many-to-one.sql
 create mode 100644 sql/create-one-to-many.sql

diff --git a/sql/cascade-update.sql b/sql/cascade-update.sql
new file mode 100644
index 0000000..6f14dbf
--- /dev/null
+++ b/sql/cascade-update.sql
@@ -0,0 +1,14 @@
+CREATE TABLE status
+(
+    id    BIGINT NOT NULL PRIMARY KEY,
+    title VARCHAR(30) NOT NULL UNIQUE
+);
+
+CREATE TABLE post
+(
+    id     BIGINT NOT NULL PRIMARY KEY,
+    title  VARCHAR(60),
+    status VARCHAR(30) NOT NULL
+        CONSTRAINT fk_post_status_status_title
+            REFERENCES status(title) ON UPDATE CASCADE
+);
\ No newline at end of file
diff --git a/sql/create-many-to-one.sql b/sql/create-many-to-one.sql
new file mode 100644
index 0000000..d20e1f7
--- /dev/null
+++ b/sql/create-many-to-one.sql
@@ -0,0 +1,41 @@
+CREATE TABLE tutorials
+(
+    id          BIGINT NOT NULL PRIMARY KEY,
+    description VARCHAR(255),
+    published   BOOLEAN,
+    title       VARCHAR(255)
+);
+
+CREATE TABLE photos
+(
+    id          BIGINT NOT NULL PRIMARY KEY,
+    description VARCHAR(255),
+    published   BOOLEAN,
+    title       VARCHAR(255)
+);
+
+CREATE TABLE comments
+(
+    id      BIGINT NOT NULL PRIMARY KEY,
+    content TEXT
+);
+
+CREATE TABLE tutorial_comments
+(
+    tutorial_id BIGINT NOT NULL
+        CONSTRAINT fk_tutorial_comments_tutorial_id
+            REFERENCES tutorials,
+    comment_id  BIGINT NOT NULL
+        CONSTRAINT fk_tutorial_comments_comment_id
+            REFERENCES comments
+);
+
+CREATE TABLE photos_comments
+(
+    photo_id   BIGINT NOT NULL
+        CONSTRAINT fk_photos_comments_photo_id
+            REFERENCES photos,
+    comment_id BIGINT NOT NULL
+        CONSTRAINT fk_photos_comments_comment_id
+            REFERENCES comments
+)
\ No newline at end of file
diff --git a/sql/create-one-to-many.sql b/sql/create-one-to-many.sql
new file mode 100644
index 0000000..d4dee2a
--- /dev/null
+++ b/sql/create-one-to-many.sql
@@ -0,0 +1,19 @@
+CREATE TABLE tutorials
+(
+    id          BIGINT NOT NULL PRIMARY KEY,
+    description VARCHAR(255),
+    published   BOOLEAN,
+    title       VARCHAR(255)
+);
+
+CREATE TABLE comments
+(
+    id          BIGINT NOT NULL PRIMARY KEY,
+    content     TEXT,
+    tutorial_id BIGINT NOT NULL
+        CONSTRAINT fk_comments_tutorial_id
+            REFERENCES tutorials
+
+);
+
+CREATE INDEX fk_comments_index ON comments (tutorial_id);
\ No newline at end of file