CSCI-UA: Database Design & Web Implementation. Professor Evan Sandhaus

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1 CSCI-UA: Database Design & Web Implementation Professor Evan Sandhaus Lecture #15: Post Spring Break Massive MySQL Review Database Design and Web Implementation

2 Database Design and Web Implementation 2

3 Administrivia Midterm Readings: Read through chapter 10 if you haven t already Homework Homework 5 is due Thursday Database Design and Web Implementation 3

4 On Today s Menu Creating tables Inserting data Selecting Data Updating Data Deleting Data Database Design and Web Implementation 4

5 Create Table Syntax CREATE TABLE [table_name] ( [column_name] [column_type] [column_details], KEY([column_name(s)], UNIQUE KEY([column_name(s)], PRIMARY KEY([column_name(s)], FOREIGN KEY ([column_name]) REFERENCES [table_name]([column_name]) ) ENGINE=[engine] DEFAULT CHARSET=[charset] COLLATE=[collation]; Database Design and Web Implementation 5

6 Create Table Syntax [column_name] [column_type] [column_details] CREATE TABLE example ( example_id int(11) NOT AUTO_INCREMENT, example_col1 varchar(255) DEFAULT Evan, example_col2 timestamp NOT DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP ); Database Design and Web Implementation 6

7 Create Table Syntax KEYS!! CREATE TABLE example ( example_id int(11) NOT AUTO_INCREMENT, example_col1 varchar(255) DEFAULT Evan, example_col2 timestamp NOT DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY_KEY (example_id), UNIQUE KEY(example_col1), KEY(example_col2) ); Database Design and Web Implementation 7

8 Create Table Syntax Engine, Charset, Collate CREATE TABLE example ( example_id int(11) NOT AUTO_INCREMENT, example_col1 varchar(255) DEFAULT Evan, example_col2 timestamp NOT DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci; Database Design and Web Implementation 8

9 Data Types Type {storage} Name Range Attributes Default Numeric {1 byte} Numeric {2 bytes} Numeric {3 bytes} Numeric {4 bytes} Numeric {8 bytes} Numeric {4 or 8} Numeric {4 bytes} Numeric {8 bytes} Numeric {M+2} Bit {8 bytes} TINYINT[(M)] -128 TO 127 [0 to 255 if UNSIGNED] SMALLINT[(M)] -32,768 to 32,767 [0 to 65,535] MEDIUMINT[(M)] -8,388,608 to 8,388,607 [0 to 16,777,215] INT[(M)] BIGINT[(M)] FLOAT(p) FLOAT[(M,D)] DOUBLE[(M,D)] DECIMAL[(M,[D])] Stored as string BIT[(M)] -2,147,483,648 to 2,147,483,647 [0 to 4,294,967,295] -/+9.223E+18 [0 to 18.45E+18] p= > "FLOAT" p= > "DOUBLE" Min=+/-1.175E-38 Max=+/-3.403E+38 Min=+/-2.225E-308 Max=+/-1.800E+308 Max Range = DOUBLE range Fixed point vs. DOUBLE float Binary. Display by [add zero converting with BIN()]. M=1-64 AUTO_INCREMENT UNSIGNED, ZEROFILL, SERIAL DEFAULT VALUE AUTO_INCREMENT, UNSIGNED, ZEROFILL, SERIAL DEFAULT VALUE AUTO_INCREMENT, UNSIGNED, ZEROFILL, SERIAL DEFAULT VALUE AUTO_INCREMENT, UNSIGNED, ZEROFILL, SERIAL DEFAULT VALUE AUTO_INCREMENT, UNSIGNED, ZEROFILL UNSIGNED, ZEROFILL UNSIGNED, ZEROFILL UNSIGNED, ZEROFILL UNSIGNED, ZEROFILL Prior to 5.03 TINYINT(1) Synonym Source: [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] [0 if NOT ] Database Design and Web Implementation 9

10 Data Types Type {storage} Name Range Attributes Default String {M char's} String {M char's1} String {#char's1} String {#char's1} String {#char's1} String {#char's1} CHAR[(M)] VARCHAR(M) M=0-255 Characters, FIXED. Right padded with spaces. M=0-65,535 Characters M=0-255 <v5.0.3 BINARY, CHARACTER SET BINARY, CHARACTER SET [ if NOT ] [ if NOT ] TINYTEXT Characters BINARY, CHARACTER SET ["" if NOT ] TEXT2 0-65,535 Char's BINARY, CHARACTER SET ["" if NOT ] MEDIUMTEXT2 0-16,777,215 Char's BINARY, CHARACTER SET ["" if NOT ] LONGTEXT2 0-4,294,967,295 Char's BINARY, CHARACTER SET ["" if NOT ] Source: Database Design and Web Implementation 10

11 Data Types Type {storage} Name Range Attributes Default String {M bytes} String {M bytes} String {#bytes1} String {#bytes1} String {#bytes1} String {#bytes1} String {1-2 bytes} BINARY[(M)] M=0-255 bytes, FIXED. Global Only (case sensitive) VARBINARY(M) 0-65,535 bytes M=0-255 <v5.0.3 Global Only (case sensitive) TINYBLOB bytes Global Only (case sensitive) BLOB 0-65,535 bytes Global Only (case sensitive) MEDIUMBLOB 0-16,777,215 bytes Global Only (case sensitive) LONGBLOB 0-4,294,967,295 bytes Global Only (case sensitive) ENUM2 ("A1","A2",...) Column is exactly 1 of values (1-255 values) CHARACTER SET ["" if NOT ] ["" if NOT ] [ if NOT ] [ if NOT ] [ if NOT ] [ if NOT ] [ if NOT ] Source: Database Design and Web Implementation 11

12 Data Types Type {storage} Name Range Attributes Default Date & Time {3 bytes} Date & Time {8 bytes} Date & Time {3 bytes} Date & Time {4 bytes} Date & Time {1 bytes} DATE " " - " " Global Only (YYYY-MM-DD) DATETIME " :00:00" - " :59:59" TIME "-838:59:59" - "838:59:59" Global Only (hh:mm:ss) TIMESTAMP Global Only (YYYY-MM-DD hh:mm:ss) Global Only (YYYYMMDDhhmmss) YEAR Global Only (YYYY) [" " if NOT ] [" :00:00" if NOT ] ["00:00:00 " if NOT ] Current Date & Time ["0000" if NOT ] Source: Database Design and Web Implementation 12

13 Article Data { "authors": { "person": [ "Peter APPLEBOME" ] }, "body": "Christopher S. Murphy, a 39-year-old three-term congressman, defeated the former wrestling executive Linda E. McMahon in a long and bitter Senate race.", "headline": "Democrat Elected Senator in Costly Connecticut Race", "publication_date": " ", "section": "U.S.", "tags": { "DES": [ "United States Politics and Government", "Voting and Voters" ], "GEO": [ "Connecticut" ], "ORG": [ "Senate" ], "PER": [ "Murphy, Christopher Scott", "McMahon, Linda E" ] } } Database Design and Web Implementation 13

14 Database Design and Web Implementation 14

15 CREATE TABLE CREATE TABLE `section` ( `section_name` VARCHAR(45), PRIMARY KEY (`section_name`) ) ENGINE = InnoDB; CREATE TABLE IF `author` ( `author_id` INT NOT AUTO_INCREMENT, `author_name` VARCHAR(255) NOT, `author_type` ENUM('PER','ORG') NOT, PRIMARY KEY (`author_id`) ) ENGINE = InnoDB; Database Design and Web Implementation 15

16 CREATE TABLE CREATE TABLE `tag` ( `tag_id` INT NOT AUTO_INCREMENT, `tag` VARCHAR(255) NOT, `tag_type` ENUM('PER','ORG','GEO','DES','TTL') NOT, PRIMARY KEY (`tag_id`) ) ENGINE = InnoDB; Database Design and Web Implementation 16

17 CREATE TABLE CREATE TABLE `article` ( `article_id` INT NOT AUTO_INCREMENT, `article_headline` VARCHAR(255) NOT, `article_publication_date` DATETIME NOT, `article_body` MEDIUMTEXT NOT, `section` VARCHAR(255) NOT, `article_correction` TEXT, PRIMARY KEY (`article_id`), FOREIGN KEY (`section` ) REFERENCES `section` (`section_name` )) ENGINE = InnoDB; Database Design and Web Implementation 17

18 CREATE TABLE CREATE TABLE `article_tag` ( `article_id` INT NOT, `tag_id` INT NOT, PRIMARY KEY (`article_id`, `tag_id`), FOREIGN KEY (`article_id` ) REFERENCES `article` (`article_id` ) FOREIGN KEY (`tag_id` ) REFERENCES `tag` (`tag_id` )) ENGINE = InnoDB; Database Design and Web Implementation 18

19 CREATE TABLE CREATE TABLE `article_author` ( `article_id` INT NOT, `author_id` INT NOT, PRIMARY KEY (`article_id`, `author_id`), FOREIGN KEY (`article_id` ) REFERENCES `article` (`article_id` ) FOREIGN KEY (`author_id` ) REFERENCES `author` (`author_id` )) ENGINE = InnoDB; Database Design and Web Implementation 19

20 INSERT Syntax INSERT INTO [table_name] (column_1, column_2,...) VALUES (value_1, value_2,...); Database Design and Web Implementation 20

21 INSERT Syntax INSERT INTO [table_name] (column_1, column_2,...) VALUES (value_1, value_2,...), (value_1, value_2,...), (value_1, value_2,...), (value_1, value_2,...), (value_1, value_2,...); Database Design and Web Implementation 21

22 Inserting Test Data Insert test article, tag, author and section. Database Design and Web Implementation 22

23 Loading Data LOAD DATA LOCAL INFILE "[file_name]" INTO TABLE [table_name]( [column_1], [column_2],... [column_n] ); Database Design and Web Implementation 23

24 Loading Data - From CSV LOAD DATA LOCAL INFILE "[file_name]" INTO TABLE [table_name]( [column_1]... [column_n] ) FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' LINES TERMINATED BY '\n' Database Design and Web Implementation 24

25 Simple Select Statement SELECT * FROM table LIMIT x OFFSET y Database Design and Web Implementation 25

26 Simple Select Statement SELECT row_1, row_2,... FROM table_1, table_2,... WHERE condition_1 (AND OR) condition_2 (AND OR)... Database Design and Web Implementation 26

27 Simple Select Statement with order by SELECT row_1, row_2,... FROM table_1, table_2,... WHERE condition_1 (AND OR) condition_2 (AND OR) ORDER BY column_1, column_2 Database Design and Web Implementation 27

28 Aggregate Queries SELECT SUM(numeric_column_1), MIN(numeric_column_2), MAX(numeric_column_3), AVG(numeric_column_4), COUNT(numeric_column_5), COUNT(DISTINCT numeric_column_1), FROM table_1... Database Design and Web Implementation 28

29 Aggregate Queries With Group By SELECT SUM(numeric_column_1), other_column_1, FROM table_1 GROUP BY other_column_1 Database Design and Web Implementation 29

30 Select Join Syntax SELECT * FROM table_1 JOIN table_2 ON table_1.id = table_2.id Database Design and Web Implementation 30

31 Select Alternate Join Syntax SELECT * FROM table_1, table_2 WHERE table_1.id = table_2.id Database Design and Web Implementation 31

32 Select Alternate Join Syntax SELECT * FROM table_1, table_2, table_3 WHERE table_1.id = table_2.id AND table_2.id = table_3.id Database Design and Web Implementation 32

33 Select CONCAT SELECT CONCAT(column_1,glue_1,column_2) FROM table_1; Database Design and Web Implementation 33

34 Select Subselect SELECT column_1 FROM table_1; WHERE column_n < (SELECT FUNC(*) FROM table); Database Design and Web Implementation 34

35 Query Me This How many tags are there of each type? How many authors are there of each type? Find the article with the most tags? Find the most commonly applied tag? How many articles are authored by more than one author? How many articles are authored by organizations services? Database Design and Web Implementation 35

36 UPDATE Syntax UPDATE [table_name] SET [column_1] = [value_1] [column_2] = [value_2] WHERE [condition_1] [(AND OR) condition_2] [(AND OR) condition_3]... [(AND OR) condition_n] Database Design and Web Implementation 36

37 DELETE Syntax DELETE FROM [table_name] WHERE [condition_1] [(AND OR) condition_2] [(AND OR) condition_3]... [(AND OR) condition_n] Database Design and Web Implementation 37