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At the library project completed
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Diff for: ‎SQL Code Challenges - Lynda/At the Library/LibraryChallenges.sql

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/******************* In the Library *********************/
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/*******************************************************/
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/* find the number of availalbe copies of Dracula */
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/*******************************************************/
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/* check total copies of the book */
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SELECT *, COUNT(BookID) AS TotalCopies
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FROM Books
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WHERE Title LIKE '%Dracula%';
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/* current total loans of the book */
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SELECT *, COUNT(LoanID) AS TotalLoans
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FROM Loans
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WHERE BookID IN (
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SELECT BookID FROM Books WHERE Title LIKE '%Dracula%'
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)
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AND ReturnedDate IS NULL;
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/* total available book */
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SELECT
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(SELECT COUNT(BookID) AS TotalCopies
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FROM Books
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WHERE Title LIKE '%Dracula%')
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-
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(SELECT COUNT(LoanID) AS TotalLoans
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FROM Loans
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WHERE BookID IN (
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SELECT BookID FROM Books WHERE Title LIKE '%Dracula%'
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)
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AND ReturnedDate IS NULL)
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AS AvailableBooks;
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/*******************************************************/
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/* Add new books to the library */
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/*******************************************************/
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INSERT INTO Books(Title, Author, Published, Barcode)
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VALUES
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('Dracula', 'Bram Stoker', 1897, 4819277482),
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('Gulliver''s Travel', 'Johnathan Swift',1729,4899254401);
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/*******************************************************/
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/* Check out Books */
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/*******************************************************/
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INSERT INTO Loans(BookID, PatronID, LoanDate, DueDate)
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VALUES
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(
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(SELECT BookID FROM Books WHERE Barcode = 4043822646),
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(SELECT PatronID FROM Patrons WHERE Email LIKE '[email protected]'),
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'2020-08-25',
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'2020-09-08'
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),
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(
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(SELECT BookID FROM Books WHERE Barcode = 2855934983),
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(SELECT PatronID FROM Patrons WHERE Email LIKE '[email protected]'),
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'2020-08-25',
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'2020-09-08'
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);
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SELECT * FROM Loans
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ORDER BY LoanID DESC
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LIMIT 5;
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/********************************************************/
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/* Check books for Due back */
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/* generate a report of books due back on July 13, 2020 */
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/* with patron contact information */
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/********************************************************/
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SELECT p.FirstName, p.LastName, p.Email, b.Title, l.LoanDate, l.DueDate
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FROM Loans l
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JOIN Books b ON l.BookID = b.BookID
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JOIN Patrons p ON l.PatronID = p.PatronID
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WHERE l.DueDate = '2020-07-13'
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AND ReturnedDate IS NULL;
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/*******************************************************/
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/* Return books to the library */
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/*******************************************************/
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SELECT * FROM Loans
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WHERE BookID IN (SELECT BookID FROM Books
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WHERE Barcode = 6435968624)
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AND ReturnedDate IS NULL;
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UPDATE Loans
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SET ReturnedDate = '2020-07-05'
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WHERE BookID IN
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(SELECT BookID FROM Books WHERE Barcode = 6435968624)
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AND ReturnedDate IS NULL;
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/*******************************************************/
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/* Encourage Patrons to check out books */
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/* generate a report of showing 10 patrons who have
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checked out the fewest books. */
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/*******************************************************/
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SELECT p.FirstName, p.LastName, p.Email, COUNT(p.PatronID) AS Total_Loans
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FROM Patrons p
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LEFT JOIN Loans l
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ON p.PatronID = l.PatronID
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GROUP BY p.PatronID
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ORDER BY 4 ASC
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LIMIT 10;
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/*******************************************************/
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/* Find books to feature for an event
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create a list of books from 1890s that are
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currently available */
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/*******************************************************/
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SELECT b.BookID, b.Title, b.Author, b.Published, COUNT(b.BookID) AS TotalAvailableBooks
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FROM Books b
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LEFT JOIN Loans l
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ON b.BookID = l.BookID
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WHERE ReturnedDate IS NOT NULL
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AND b.Published BETWEEN 1890 AND 1899
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GROUP BY b.BookID
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ORDER BY b.BookID;
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/*******************************************************/
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/* Book Statistics
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/* create a report to show how many books were
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published each year. */
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/*******************************************************/
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SELECT Published, COUNT(DISTINCT(Title)) AS TotalNumberOfPublishedBooks
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FROM Books
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GROUP BY Published
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ORDER BY TotalNumberOfPublishedBooks DESC;
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/*************************************************************/
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/* Book Statistics */
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/* create a report to show 5 most popular Books to check out */
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/*************************************************************/
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SELECT b.Title, b.Author, b.Published, COUNT(b.Title) AS TotalTimesOfLoans
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FROM Books b
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JOIN Loans l
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ON b.BookID = l.BookID
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GROUP BY b.Title
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ORDER BY 4 DESC
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LIMIT 5;

Diff for: ‎SQL Code Challenges - Lynda/At the Library/library.db

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Diff for: ‎SQL Code Challenges - Lynda/At the Library/library.sqbpro

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<?xml version="1.0" encoding="UTF-8"?><sqlb_project><db path="C:/Users/Phone Thiri Yadana/Documents/02.Studies/SQL/exercises/MySQL Projects/SQL Code Challenges - Lynda/At the Library/library.db" readonly="0" foreign_keys="1" case_sensitive_like="0" temp_store="0" wal_autocheckpoint="1000" synchronous="2"/><attached/><window><main_tabs open="structure browser pragmas query" current="0"/></window><tab_structure><column_width id="0" width="300"/><column_width id="1" width="0"/><column_width id="2" width="100"/><column_width id="3" width="938"/><column_width id="4" width="0"/><expanded_item id="0" parent="1"/><expanded_item id="1" parent="1"/><expanded_item id="2" parent="1"/><expanded_item id="3" parent="1"/></tab_structure><tab_browse><current_table name="4,5:mainBooks"/><default_encoding codec=""/><browse_table_settings><table schema="main" name="Books" show_row_id="0" encoding="" plot_x_axis="" unlock_view_pk="_rowid_"><sort><column index="1" mode="1"/></sort><column_widths><column index="1" value="53"/><column index="2" value="300"/><column index="3" value="198"/><column index="4" value="69"/><column index="5" value="77"/></column_widths><filter_values/><conditional_formats/><row_id_formats/><display_formats/><hidden_columns/><plot_y_axes/><global_filter/></table><table schema="main" name="Loans" show_row_id="0" encoding="" plot_x_axis="" unlock_view_pk="_rowid_"><sort><column index="1" mode="1"/></sort><column_widths><column index="1" value="53"/><column index="2" value="53"/><column index="3" value="66"/><column index="4" value="73"/><column index="5" value="73"/></column_widths><filter_values/><conditional_formats/><row_id_formats/><display_formats/><hidden_columns/><plot_y_axes/><global_filter/></table></browse_table_settings></tab_browse><tab_sql><sql name="LibraryChallenges.sql">/******************* In the Library *********************/
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/*******************************************************/
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/* find the number of availalbe copies of Dracula */
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/*******************************************************/
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/* check total copies of the book */
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SELECT *, COUNT(BookID) AS TotalCopies
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FROM Books
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WHERE Title LIKE '%Dracula%';
11+
12+
/* current total loans of the book */
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SELECT *, COUNT(LoanID) AS TotalLoans
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FROM Loans
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WHERE BookID IN (
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SELECT BookID FROM Books WHERE Title LIKE '%Dracula%'
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)
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AND ReturnedDate IS NULL;
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20+
/* total available book */
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SELECT
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(SELECT COUNT(BookID) AS TotalCopies
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FROM Books
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WHERE Title LIKE '%Dracula%')
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-
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(SELECT COUNT(LoanID) AS TotalLoans
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FROM Loans
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WHERE BookID IN (
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SELECT BookID FROM Books WHERE Title LIKE '%Dracula%'
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)
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AND ReturnedDate IS NULL)
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AS AvailableBooks;
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35+
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/*******************************************************/
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/* Add new books to the library */
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/*******************************************************/
39+
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INSERT INTO Books(Title, Author, Published, Barcode)
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VALUES
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('Dracula', 'Bram Stoker', 1897, 4819277482),
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('Gulliver''s Travel', 'Johnathan Swift',1729,4899254401);
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45+
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/*******************************************************/
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/* Check out Books */
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/*******************************************************/
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INSERT INTO Loans(BookID, PatronID, LoanDate, DueDate)
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VALUES
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(
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(SELECT BookID FROM Books WHERE Barcode = 4043822646),
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(SELECT PatronID FROM Patrons WHERE Email LIKE '[email protected]'),
55+
'2020-08-25',
56+
'2020-09-08'
57+
),
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(
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(SELECT BookID FROM Books WHERE Barcode = 2855934983),
60+
(SELECT PatronID FROM Patrons WHERE Email LIKE '[email protected]'),
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'2020-08-25',
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'2020-09-08'
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);
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SELECT * FROM Loans
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ORDER BY LoanID DESC
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LIMIT 5;
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69+
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/********************************************************/
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/* Check books for Due back */
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/* generate a report of books due back on July 13, 2020 */
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/* with patron contact information */
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/********************************************************/
75+
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SELECT p.FirstName, p.LastName, p.Email, b.Title, l.LoanDate, l.DueDate
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FROM Loans l
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JOIN Books b ON l.BookID = b.BookID
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JOIN Patrons p ON l.PatronID = p.PatronID
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WHERE l.DueDate = '2020-07-13'
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AND ReturnedDate IS NULL;
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/*******************************************************/
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/* Return books to the library */
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/*******************************************************/
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SELECT * FROM Loans
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WHERE BookID IN (SELECT BookID FROM Books
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WHERE Barcode = 6435968624)
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AND ReturnedDate IS NULL;
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UPDATE Loans
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SET ReturnedDate = '2020-07-05'
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WHERE BookID IN
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(SELECT BookID FROM Books WHERE Barcode = 6435968624)
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AND ReturnedDate IS NULL;
97+
98+
99+
/*******************************************************/
100+
/* Encourage Patrons to check out books */
101+
/* generate a report of showing 10 patrons who have
102+
checked out the fewest books. */
103+
/*******************************************************/
104+
SELECT p.FirstName, p.LastName, p.Email, COUNT(p.PatronID) AS Total_Loans
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FROM Patrons p
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LEFT JOIN Loans l
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ON p.PatronID = l.PatronID
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GROUP BY p.PatronID
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ORDER BY 4 ASC
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LIMIT 10;
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112+
113+
/*******************************************************/
114+
/* Find books to feature for an event
115+
create a list of books from 1890s that are
116+
currently available */
117+
/*******************************************************/
118+
SELECT b.BookID, b.Title, b.Author, b.Published, COUNT(b.BookID) AS TotalAvailableBooks
119+
FROM Books b
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LEFT JOIN Loans l
121+
ON b.BookID = l.BookID
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WHERE ReturnedDate IS NOT NULL
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AND b.Published BETWEEN 1890 AND 1899
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GROUP BY b.BookID
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ORDER BY b.BookID;
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127+
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/*******************************************************/
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/* Book Statistics
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/* create a report to show how many books were
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published each year. */
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/*******************************************************/
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SELECT Published, COUNT(DISTINCT(Title)) AS TotalNumberOfPublishedBooks
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FROM Books
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GROUP BY Published
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ORDER BY TotalNumberOfPublishedBooks DESC;
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138+
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/*************************************************************/
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/* Book Statistics */
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/* create a report to show 5 most popular Books to check out */
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/*************************************************************/
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SELECT b.Title, b.Author, b.Published, COUNT(b.Title) AS TotalTimesOfLoans
144+
FROM Books b
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JOIN Loans l
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ON b.BookID = l.BookID
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GROUP BY b.Title
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ORDER BY 4 DESC
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LIMIT 5;
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</sql><current_tab id="0"/></tab_sql></sqlb_project>

Diff for: ‎SQL Code Challenges - Lynda/At the Library/original_db/library.db

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Diff for: ‎readme.md

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@@ -25,7 +25,8 @@ Compilation of MySQL data analysis related projects, notes and challenges.
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**SQL Code Challenges** : challenges are from Lynda course [SQL Code Challenges](https://www.lynda.com/SQL-tutorials/SQL-Code-Challenges/2825725-2.html) which has 2 projects:
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- **In the Restaurant** - helping the Restaurant to manage customer information, reservations, orders and party invities in for Restaurant 20th Anniversary.
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- **At the Library** - helping the Library to manage the books statistics, check out and loan process, managing on due loans, encouraging patrons, etc.
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**SQL 30 Questions**: challenges from Skillshare course [Skill Share - 30 Simple SQL Interview Queries](https://www.skillshare.com/classes/SQL-Interview-30-Simple-SQL-Interview-Queries-in-2019/809081836).
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**SQL Queries - Practice your SQL Knowledge**: challenges from Skillshare course [SQL Queries: Practice your SQL Knowledge!](https://www.skillshare.com/classes/SQL-Queries-Practice-your-SQL-Knowledge/465058562).

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