Merge branch 'Baeldung:main' into main

Author: daKeshra

1-setup/manual-setup/postgresql-setup.md

@@ -8,7 +8,7 @@ Download and install PostgreSQL: https://www.postgresql.org/download/ and the pg
 (the script is tested with version PostgreSQL v 16.2 and pgAdmin 4 v 8.5) 
 
 Open the pgAdmin tool and connect to the server with your credentials. Then open a new query and run the script in the university-postgresql.sql file as follows:
-- first, run the DROP DATABASE statament by itself (otherwise it will show an error)
+- first, run the DROP DATABASE statement by itself (otherwise it will show an error)
 - copy and run the CREATE DATABASE statement by itself
 - copy and run the rest of the script to create the tables.
 

mysql-queries/README.md

@@ -1 +1,4 @@
-
+### Relevant Articles:
+-  [How to Find the Engine for a Specific Table in MySQL?](https://www.baeldung.com/sql/mysql-find-table-storage-engine)
+-  [Changing a Table’s Storage Engine in MySQL](https://www.baeldung.com/sql/mysql-change-table-storage-engine)
+-  [Pattern Matching in MySQL](https://www.baeldung.com/sql/mysql-pattern-matching)

mysql-queries/find-storage-engine/script.sql

@@ -0,0 +1,23 @@
+-- specify the database
+USE University;
+
+-- find the engine of University.Student
+-- using the information_schema.tables
+SELECT engine
+FROM information_schema.tables
+WHERE table_schema = 'University'
+  AND table_name = 'Student';
+
+-- find the engine of all the tables in University
+-- using the information_schema.tables
+SELECT table_name, engine
+FROM information_schema.tables
+WHERE table_schema = 'University'
+  AND table_type = 'BASE TABLE'
+  AND table_name = 'Student';
+
+-- find the engine of University.Student
+-- using the information_schema.tables
+SHOW TABLE STATUS 
+FROM University
+WHERE name = 'Student';

mysql-queries/mysql-images/images.sql

@@ -0,0 +1,90 @@
+-- SQL Script for the article Images in MySQL
+
+-- Change schema to University
+USE University;
+
+-- Check max image size you can upload
+SHOW VARIABLES LIKE 'max_allowed_packet';
+SHOW VARIABLES LIKE 'secure_file_priv';
+
+-- Grant access
+GRANT ALL PRIVILEGES ON *.* TO 'root'@'localhost' WITH GRANT OPTION;
+FLUSH PRIVILEGES;
+
+-- DIRECT STORAGE
+
+-- Create Tables
+CREATE TABLE DepartmentComplete
+(
+    id INT PRIMARY KEY NOT Null,
+    name VARCHAR (50),
+    code VARCHAR (4),
+    logo BLOB,
+    UNIQUE (id)
+);
+
+CREATE TABLE StudentComplete
+(
+    id INT PRIMARY KEY NOT null,
+    name VARCHAR (60),
+    national_id BIGINT NOT Null, 
+    birth_date DATE,
+    enrollment_date DATE,
+    graduation_date DATE,
+    gpa FLOAT,
+    profile_pic BLOB,
+    UNIQUE (id)
+);
+
+-- Adding data for DepartmentComplete 
+INSERT INTO DepartmentComplete (id, name, code, logo) VALUES
+  (1, 'Computer Science', 'CS', LOAD_FILE('/usr/local/mysql/data/cs_logo.png')),
+  (2, 'Electronics and Communications', 'EC', LOAD_FILE('/usr/local/mysql/data/ece_logo.png')),
+  (3, 'Social Sciences', 'SS', LOAD_FILE('/usr/local/mysql/data/ss_logo.png')),
+  (4, 'Computational Biology', 'CB', LOAD_FILE('/usr/local/mysql/data/cb_logo.png')),
+  (5, 'Mathematics', 'MA', LOAD_FILE('/usr/local/mysql/data/ma_logo.png'));
+
+-- Adding data for StudentComplete
+INSERT INTO StudentComplete (id, name, national_id, birth_date, enrollment_date, graduation_date, gpa, profile_pic) VALUES
+  (1001, 'John Liu', 123345566, '2001-04-05', '2020-01-15', '2024-06-15', 4, LOAD_FILE('/usr/local/mysql/data/john_pp.jpeg')),
+  (1003, 'Rita Ora', 132345166, '2001-01-14', '2020-01-15', '2024-06-15', 4.2, LOAD_FILE('/usr/local/mysql/data/rita_pp.jpeg')),
+  (1007, 'Philip Lose', 321345566, '2001-06-15', '2020-01-15', '2024-06-15', 3.8, LOAD_FILE('/usr/local/mysql/data/philip_pp.jpeg')),
+  (1010, 'Samantha Prabhu', 3217165566, '2001-03-21', '2020-01-15', '2024-06-15', 4.9, LOAD_FILE('/usr/local/mysql/data/cs_logo.png')),
+  (1011, 'Vikas Jain', 321345662, '2001-7-18', '2020-01-15', NULL, 3.3, LOAD_FILE('/usr/local/mysql/data/vikas_pp.jpeg'));
+
+SELECT * from DepartmentComplete;
+
+SELECT * from StudentComplete;
+
+-- INDIRECT STORAGE
+-- Alter Table DepartmentComplete to drop logo
+ALTER TABLE DepartmentComplete
+DROP COLUMN logo;
+
+-- Alter Table DepartmentComplete to add logo_path
+ALTER TABLE DepartmentComplete 
+ADD logo_path VARCHAR (256);
+
+-- Alter Table StudentComplete to drop profile_pic
+ALTER TABLE StudentComplete
+DROP COLUMN profile_pic;
+
+-- Alter Table StudentComplete to add profile_pic_path
+ALTER TABLE StudentComplete 
+ADD profile_pic_path VARCHAR (256);
+
+
+-- Update data 
+UPDATE DepartmentComplete SET logo_path='/usr/local/mysql/data/cs_logo.png' WHERE code ='CS'; 
+UPDATE DepartmentComplete SET logo_path='/usr/local/mysql/data/ece_logo.png' WHERE code ='EC'; 
+UPDATE DepartmentComplete SET logo_path='/usr/local/mysql/data/ss_logo.png' WHERE code ='SS'; 
+UPDATE DepartmentComplete SET logo_path='/usr/local/mysql/data/cb_logo.png' WHERE code ='CB'; 
+UPDATE DepartmentComplete SET logo_path='/usr/local/mysql/data/ma_logo.png' WHERE code ='MA'; 
+
+UPDATE StudentComplete SET profile_pic_path='/usr/local/mysql/data/john_pp.jpeg' WHERE name ='John Liu'; 
+UPDATE StudentComplete SET profile_pic_path='/usr/local/mysql/data/rita_pp.jpeg' WHERE name ='Rita Ora'; 
+UPDATE StudentComplete SET profile_pic_path='/usr/local/mysql/data/philip_pp.jpeg' WHERE name ='Philip Lose'; 
+UPDATE StudentComplete SET profile_pic_path='/usr/local/mysql/data/samantha_pp.jpeg' WHERE name ='Samantha Prabhu'; 
+UPDATE StudentComplete SET profile_pic_path='/usr/local/mysql/data/vikas_pp.jpeg' WHERE name ='Vikas Jain'; 
+
+-- END