CREATE TABLE ZCTA (
zcta CHAR(6) NOT NULL
, lat_degrees DECIMAL(9,6) NOT NULL
, long_degrees DECIMAL(9,6) NOT NULL
, PRIMARY KEY(zcta));

ALTER TABLE ZCTA
ADD COLUMN lat_radians DECIMAL(9,6) NOT NULL
, ADD COLUMN long_radians DECIMAL(9,6) NOT NULL;

UPDATE ZCTA
SET lat_radians = lat_degrees * (PI() / 180)
, long_radians = long_degrees * (PI() / 180);

/* calculating the distance between two points */
SELECT
ROUND(ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956, 2) AS “Distance”
FROM ZCTA x1, ZCTA x2
WHERE x1.zcta = ’1001′
AND x2.zcta = ’21236′;

/* zip codes within a given radius */
SELECT
x2.zcta AS zip
, ROUND(ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956, 2) AS “Distance”
FROM ZCTA x1, ZCTA x2
WHERE x1.zcta = ’21236′
AND ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956 <= 5
ORDER BY Distance;

/* StoreLocation table definition */
CREATE TABLE StoreLocation (
store_id INT NOT NULL AUTO_INCREMENT
, address VARCHAR(100) NOT NULL
, city VARCHAR(35) NOT NULL
, state CHAR(2) NOT NULL
, zip VARCHAR(6) NOT NULL
, PRIMARY KEY (store_id)
, KEY (zip));

/* zip codes within a given radius  with StoreLocation table*/
SELECT
address
, city
, state
, zip
FROM StoreLocation
WHERE zip IN (
SELECT x2.zcta
FROM ZCTA x1, ZCTA x2
WHERE x1.zcta = ’21236′
AND ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956 <= 5
);

SELECT
address
, city
, state
, zip
FROM StoreLocation s1
INNER JOIN (
SELECT x2.zcta
FROM ZCTA x1, ZCTA x2
WHERE x1.zcta = ’21236′
AND ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956 <= 5
) AS zips
ON s1.zip = zips.zcta;

SELECT
address
, city
, state
, zip
FROM ZCTA x1, ZCTA x2
INNER JOIN StoreLocation s1
ON x2.zcta = s1.zip
WHERE x1.zcta = ’21236′
AND ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956 <= 5;

SELECT
address
, city
, state
, zip
, ROUND(ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956, 2) AS “Distance”
FROM ZCTA x1, ZCTA x2
INNER JOIN StoreLocation s1
ON x2.zcta = s1.zip
WHERE x1.zcta = ’21236′
AND ACOS(SIN(x1.lat_radians) * SIN(x2.lat_radians)
+ COS(x1.lat_radians) * COS(x2.lat_radians)
* COS(x2.long_radians – x1.long_radians)) * 3956 <= 5
ORDER BY Distance;

ANSI Style:
SELECT i.order_id, p.product_id, p.name, p.desc
FROM CustomerItem i
INNER JOIN Product p ON i.product_id = p.product_id
WHERE i.order_id = 84463;

Sometimes, it’s hard to realized whether there is other style of SQL. Obviously there are two different SQL style. theta is older and more obscure but many people still use it.

<?xml version=”1.0″ encoding=”UTF-8″?>
<Context docBase=”e-sports” path=”/e-sports” debug=”0″ reloadable=”true”
source=”org.eclipse.jst.j2ee.server:e-sports”>
<Logger className=”org.apache.catalina.logger.FileLogger”
prefix=”e-sports_log.” suffix=”.txt” timestamp=”true” />
<Resource name=”jdbc/myoracle”
auth=”Container”
type=”javax.sql.DataSource”
driverClassName=”oracle.jdbc.driver.OracleDriver”
factory=”org.apache.tomcat.dbcp.dbcp.BasicDataSourceFactory”
url=”jdbc:oracle:thin:@127.0.0.1:1521:ORA92″
username=”scott”
password=”tiger”
maxActive=”20″
maxIdle=”10″
maxWait=”-1″ />
</Context>

2. test.jsp
<%@ page import=”java.sql.Connection” %>
<%@ page import=”java.sql.ResultSet” %>
<%@ page import=”java.sql.SQLException” %>
<%@ page import=”java.sql.Statement” %>
<%@ page import=”javax.naming.Context” %>
<%@ page import=”javax.naming.InitialContext” %>
<%@ page import=”javax.naming.NamingException” %>
<%@ page import=”javax.sql.DataSource” %>

<%
Context ctx = null;
DataSource source = null;
Connection con = null;

try {
ctx = new InitialContext();
ctx = (Context) ctx.lookup(“java:comp/env”);
source = (DataSource) ctx.lookup(“jdbc/myoracle”);

System.out.println(“DataSource ===========================”+ source);

con = source.getConnection();
System.out.println(“Connection ============================”+ con);
} catch (NamingException ne) {
ne.printStackTrace();
}
%>