From e0d2a784d7d4fed8ab92cebe5853e186581ac4eb Mon Sep 17 00:00:00 2001
From: Arkadiusz Hypki <arkadiusz@hypki.net>
Date: Mon, 11 Mar 2024 13:31:05 +0100
Subject: [PATCH] 'Excercises for SQL and html;'

---
 03_Sql_html/html_excercise.txt |  1 +
 03_Sql_html/schema.sql         | 35 ++++++++++++++++++++++++++++++++++
 03_Sql_html/sql_excercises.txt | 22 +++++++++++++++++++++
 3 files changed, 58 insertions(+)
 create mode 100644 03_Sql_html/html_excercise.txt
 create mode 100644 03_Sql_html/schema.sql
 create mode 100644 03_Sql_html/sql_excercises.txt

diff --git a/03_Sql_html/html_excercise.txt b/03_Sql_html/html_excercise.txt
new file mode 100644
index 0000000..92d42fe
--- /dev/null
+++ b/03_Sql_html/html_excercise.txt
@@ -0,0 +1 @@
+Create html view, in plain text, for some of the SQl results.
\ No newline at end of file
diff --git a/03_Sql_html/schema.sql b/03_Sql_html/schema.sql
new file mode 100644
index 0000000..226069f
--- /dev/null
+++ b/03_Sql_html/schema.sql
@@ -0,0 +1,35 @@
+-- The Warehouse
+-- lINK: https://en.wikibooks.org/wiki/SQL_Exercises/The_warehouse
+
+CREATE TABLE Warehouses (
+   Code INTEGER NOT NULL,
+   Location VARCHAR(255) NOT NULL ,
+   Capacity INTEGER NOT NULL,
+   PRIMARY KEY (Code)
+ );
+CREATE TABLE Boxes (
+    Code CHAR(4) NOT NULL,
+    Contents VARCHAR(255) NOT NULL ,
+    Value REAL NOT NULL ,
+    Warehouse INTEGER NOT NULL,
+    PRIMARY KEY (Code),
+    FOREIGN KEY (Warehouse) REFERENCES Warehouses(Code)
+ ) ENGINE=INNODB;
+ 
+  INSERT INTO Warehouses(Code,Location,Capacity) VALUES(1,'Chicago',3);
+ INSERT INTO Warehouses(Code,Location,Capacity) VALUES(2,'Chicago',4);
+ INSERT INTO Warehouses(Code,Location,Capacity) VALUES(3,'New York',7);
+ INSERT INTO Warehouses(Code,Location,Capacity) VALUES(4,'Los Angeles',2);
+ INSERT INTO Warehouses(Code,Location,Capacity) VALUES(5,'San Francisco',8);
+ 
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('0MN7','Rocks',180,3);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('4H8P','Rocks',250,1);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('4RT3','Scissors',190,4);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('7G3H','Rocks',200,1);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('8JN6','Papers',75,1);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('8Y6U','Papers',50,3);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('9J6F','Papers',175,2);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('LL08','Rocks',140,4);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('P0H6','Scissors',125,1);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('P2T6','Scissors',150,2);
+ INSERT INTO Boxes(Code,Contents,Value,Warehouse) VALUES('TU55','Papers',90,5);
\ No newline at end of file
diff --git a/03_Sql_html/sql_excercises.txt b/03_Sql_html/sql_excercises.txt
new file mode 100644
index 0000000..e05d638
--- /dev/null
+++ b/03_Sql_html/sql_excercises.txt
@@ -0,0 +1,22 @@
+--3.1 Select all warehouses.
+--3.2 Select all boxes with a value larger than $150.
+--3.3 Select all distinct contents in all the boxes.
+--3.4 Select the average value of all the boxes.
+--3.5 Select the warehouse code and the average value of the boxes in each warehouse.
+--3.6 Same as previous exercise, but select only those warehouses where the average value of the boxes is greater than 150.
+--3.7 Select the code of each box, along with the name of the city the box is located in.
+--3.8 Select the warehouse codes, along with the number of boxes in each warehouse. 
+    -- Optionally, take into account that some warehouses are empty (i.e., the box count should show up as zero, instead of omitting the warehouse from the result).
+--3.9 Select the codes of all warehouses that are saturated (a warehouse is saturated if the number of boxes in it is larger than the warehouse's capacity).
+--3.10 Select the codes of all the boxes located in Chicago.
+--3.11 Create a new warehouse in New York with a capacity for 3 boxes.
+--3.12 Create a new box, with code "H5RT", containing "Papers" with a value of $200, and located in warehouse 2.
+--3.13 Reduce the value of all boxes by 15%.
+--3.14 Remove all boxes with a value lower than $100.
+-- 3.15 Remove all boxes from saturated warehouses.
+-- 3.16 Add Index for column "Warehouse" in table "boxes"
+    -- !!!NOTE!!!: index should NOT be used on small tables in practice
+-- 3.17 Print all the existing indexes
+    -- !!!NOTE!!!: index should NOT be used on small tables in practice
+-- 3.18 Remove (drop) the index you added just
+    -- !!!NOTE!!!: index should NOT be used on small tables in practice
\ No newline at end of file