2009.10.13 slide 1is 257 – fall 2009 more on mysql and sql university of california, berkeley...
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IS 257 – Fall 2009 2009.10.13 SLIDE 1
More on MySQL and SQL
University of California, Berkeley
School of Information
IS 257: Database Management
IS 257 – Fall 2009 2009.10.13 SLIDE 2
Lecture Outline
• Review– ColdFusion– PHP
• More on MySQL and SQL
IS 257 – Fall 2009 2009.10.13 SLIDE 3
Lecture Outline
• Review– ColdFusion– PHP
• More on MySQL and SQL
IS 257 – Fall 2009 2009.10.13 SLIDE 4
Templates
• Assume we have a database named contents_of_my_shopping_cart.mdb -- single table called contents...
• Create an HTML page (uses extension .cfm), and before <HEAD>...
IS 257 – Fall 2009 2009.10.13 SLIDE 5
Templates cont.
<CFQUERY NAME= ”cart" DATASOURCE=“contents_of_my_shopping_cart">
SELECT * FROM contents ; </CFQUERY>
<HEAD> <TITLE>Contents of My Shopping Cart</TITLE></HEAD><BODY> <H1>Contents of My Shopping Cart</H1> <CFOUTPUT QUERY= ”cart"> <B>#Item#</B> <BR> #Date_of_item# <BR> $#Price# <P></CFOUTPUT></BODY></HTML>
IS 257 – Fall 2009 2009.10.13 SLIDE 6
Templates cont.
Contents of My Shopping Cart
Bouncy Ball with Psychedelic Markings 12 December 1998 $0.25
Shiny Blue Widget 14 December 1998 $2.53
Large Orange Widget 14 December 1998 $3.75
IS 257 – Fall 2009 2009.10.13 SLIDE 7
CFIF and CFELSE
<CFOUTPUT QUERY= ”cart"> Item: #Item# <BR><CFIF #Picture# EQ""> <IMG SRC=“generic_picture.jpg"> <BR><CFELSE> <IMG SRC="#Picture#"> <BR></CFIF></CFOUTPUT>
IS 257 – Fall 2009 2009.10.13 SLIDE 8
More Templates
<CFQUERY DATASOURCE = “AZ2”>INSERT INTO Employees(firstname, lastname,phoneext) VALUES(‘#firstname#’, ‘#lastname#’,‘#phoneext#’) </CFQUERY><HTML><HEAD><TITLE>Employee Added</TITLE><BODY><H1>Employee Added</H1><CFOUTPUT>Employee <B>#firstname# #lastname#</B> added.</CFOUTPUT></BODY></HTML>
IS 257 – Fall 2009 2009.10.13 SLIDE 9
CFML ColdFusion Markup Language
• Read data from and update data to databases and tables
• Create dynamic data-driven pages• Perform conditional processing• Populate forms with live data• Process form submissions• Generate and retrieve email messages• Perform HTTP and FTP function• Perform credit card verification and authorization• Read and write client-side cookies
IS 257 – Fall 2009 2009.10.13 SLIDE 10
Lecture Outline
• Review– ColdFusion– PHP
• More on MySQL and SQL
IS 257 – Fall 2009 2009.10.13 SLIDE 11
PHP
• PHP is an Open Source Software project with many programmers working on the code.– Commonly paired with MySQL, another OSS
project– Free– Both Windows and Unix support
• Estimated that more than 250,000 web sites use PHP as an Apache Module.
IS 257 – Fall 2009 2009.10.13 SLIDE 12
PHP Syntax
• Similar to “C” or Java (note lines end with “;”)
• Includes most programming structures (Loops, functions, Arrays, etc.)
• Loads HTML form variables so that they are addressable by name
<HTML><BODY>
<?php
$myvar = “Hello World”;
echo $myvar ;
?>
</BODY></HTML>
IS 257 – Fall 2009 2009.10.13 SLIDE 13
Combined with MySQL
• DBMS interface appears as a set of functions:
<HTML><BODY><?php$db = mysql_connect(“localhost”, “root”);mysql_select_db(“mydb”,$db);$result = mysql_query(“SELECT * FROM employees”, $db);Printf(“First Name: %s <br>\n”, mysql_result($result, 0 “first”);Printf(“Last Name: %s <br>\n”, mysql_result($result, 0 “last”);?></BODY></HTML>
IS 257 – Fall 2009 2009.10.13 SLIDE 14
Lecture Outline
• Review– ColdFusion– PHP
• More on MySQL and SQL
IS 257 – Fall 2009 2009.10.13 SLIDE 15
Today
• More on SQL for data manipulation and modification
IS 257 – Fall 2009 2009.10.13 SLIDE 16
SELECT
• Syntax:– SELECT [DISTINCT] attr1, attr2,…, attr3 as
label, function(xxx), calculation, attr5, attr6 FROM relname1 r1, relname2 r2,… rel3 r3 WHERE condition1 {AND | OR} condition2 ORDER BY attr1 [DESC], attr3 [DESC]
IS 257 – Fall 2009 2009.10.13 SLIDE 17
SELECT Conditions
• = equal to a particular value• >= greater than or equal to a particular value• > greater than a particular value• <= less than or equal to a particular value• <> or != not equal to a particular value• LIKE ‘%wom_n%’ (Note different wild card from Access)• opt1 SOUNDS LIKE opt2• IN (‘opt1’, ‘opt2’,…,’optn’)• BETWEEN opt1 AND opt2• IS NULL or IS NOT NULL
IS 257 – Fall 2009 2009.10.13 SLIDE 18
Aggregate (group by) Functions• COUNT(dataitem)• COUNT(DISTINCT expr)• AVG(numbercolumn)• SUM(numbercolumn)• MAX(numbercolumn)• MIN(numbercolumn)• STDDEV(numbercolumn)• VARIANCE(numbercolumn)• and other variants of these…
IS 257 – Fall 2009 2009.10.13 SLIDE 19
Numeric Functions
• ABS(n)• ACOS(n)• ASIN(n)• ATAN(n)• ATAN2(n, m)• CEIL(n)• COS(n)• COSH(n)• CONV(n, f-
base,t-base)• COT(n)
• ROUND(n)• SIGN(n)• SIN(n)• SINH(n)• SQRT(n)• TAN(n)• TANH(n)• TRUNCATE(
n,m)
• DEGREES(n)• EXP(n)• EXP(n)• FLOOR(n)• LN(n)• LOG(n,b)• MOD(n)• PI()• POWER(n,p)
IS 257 – Fall 2009 2009.10.13 SLIDE 20
Character Functions returning character values
• CHAR(n,…)• CONCAT(str1,str2,…)• LOWER(char)• LPAD(char, n,char2),
RPAD(char, n,char2)• LTRIM(char, n, cset),
RTRIM(char, n, cset)
• REPLACE(char, srch, repl)
• SOUNDEX(char)• SUBSTR(char, m, n)• UPPER(char)
IS 257 – Fall 2009 2009.10.13 SLIDE 21
Character Function returning numeric values
• ASCII(char)• INSTR(char1, char2)• LENGTH(char)• BIT_LENGTH(str)• CHAR_LENGTH(str)• LOCATE(substr,str)• LOCATE(substr,str,po
s)• and many other
variants.
IS 257 – Fall 2009 2009.10.13 SLIDE 22
Date functions
• ADDDATE(dt, INTERVAL expr unit) or ADDDATE(dt, days)
• ADDTIME(dttm, time)• LAST_DAY(dt)• MONTH(dt) – YEAR(dt) – DAY(dt)• MONTHNAME(dt)• NOW()• NEW_TIME(d, z1, z2) -- PST, AST, etc. • NEXT_DAY(d, dayname)• STR_TO_DATE(str,format)• SYSDATE()
IS 257 – Fall 2009 2009.10.13 SLIDE 23
Demo
• Setting up Diveshop on MySQL
• SQL Queries for Assignment 3
• MySQL and XML