More on MySQL and SQL

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More on MySQL and SQL

• University of California, Berkeley
• School of Information
• IS 257 Database Management

2
Lecture Outline

• Review
• ColdFusion
• PHP
• More on MySQL and SQL

3
Lecture Outline

• Review
• ColdFusion
• PHP
• More on MySQL and SQL

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 ltHEADgt...

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Templates cont.

• ltCFQUERY NAME cart" DATASOURCEcontents_of_my_s
  hopping_cart"gt
• SELECT FROM contents lt/CFQUERYgt
• ltHEADgt
• ltTITLEgtContents of My Shopping Cartlt/TITLEgt
• lt/HEADgt
• ltBODYgt
• ltH1gtContents of My Shopping Cartlt/H1gt
• ltCFOUTPUT QUERY cart"gt
• ltBgtItemlt/Bgt ltBRgt
• Date_of_item ltBRgt
• Price ltPgt
• lt/CFOUTPUTgt
• lt/BODYgt
• lt/HTMLgt

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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
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CFIF and CFELSE
ltCFOUTPUT QUERY cart"gt Item Item
ltBRgt ltCFIF Picture EQ""gt ltIMG
SRCgeneric_picture.jpg"gt ltBRgt ltCFELSEgt
ltIMG SRC"Picture"gt ltBRgt lt/CFIFgt lt/CFOUTPUTgt
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More Templates
ltCFQUERY DATASOURCE AZ2gt INSERT INTO
Employees(firstname, lastname, phoneext)
VALUES(firstname, lastname, phoneext)
lt/CFQUERYgt ltHTMLgtltHEADgtltTITLEgtEmployee
Addedlt/TITLEgt ltBODYgtltH1gtEmployee
Addedlt/H1gt ltCFOUTPUTgt Employee ltBgtfirstname
lastnamelt/Bgt added. lt/CFOUTPUTgtlt/BODYgt lt/HTMLgt
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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

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Lecture Outline

• Review
• ColdFusion
• PHP
• More on MySQL and SQL

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.

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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

ltHTMLgtltBODYgt lt?php myvar Hello World
echo myvar ?gt lt/BODYgtlt/HTMLgt
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Combined with MySQL

• DBMS interface appears as a set of functions

ltHTMLgtltBODYgt lt?php db mysql_connect(localhost
, root) mysql_select_db(mydb,db) result
mysql_query(SELECT FROM employees,
db) Printf(First Name s ltbrgt\n,
mysql_result(result, 0 first) Printf(Last
Name s ltbrgt\n, mysql_result(result, 0
last) ?gtlt/BODYgtlt/HTMLgt
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Lecture Outline

• Review
• ColdFusion
• PHP
• More on MySQL and SQL

15
Today

• More on SQL for data manipulation and
  modification

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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

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SELECT Conditions

• equal to a particular value
• gt greater than or equal to a particular value
• gt greater than a particular value
• lt less than or equal to a particular value
• ltgt 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

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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

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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)

• DEGREES(n)
• EXP(n)
• EXP(n)
• FLOOR(n)
• LN(n)
• LOG(n,b)
• MOD(n)
• PI()
• POWER(n,p)

• ROUND(n)
• SIGN(n)
• SIN(n)
• SINH(n)
• SQRT(n)
• TAN(n)
• TANH(n)
• TRUNCATE(n,m)

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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)

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Character Function returning numeric values

• ASCII(char)
• INSTR(char1, char2)
• LENGTH(char)
• BIT_LENGTH(str)
• CHAR_LENGTH(str)
• LOCATE(substr,str)
• LOCATE(substr,str,pos)
• and many other variants.

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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()

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Demo

• Setting up Diveshop on MySQL
• SQL Queries for Assignment 3
• MySQL and XML