I'm doing text mining using Oracle SQL Developer: ODMiner.. I imported the data "WEBLOG" into a table.. This weblog data consist of users activity, date, time, url, etc. The first step I took was to use a function to transform date and time that I have in the data table, into a number representing the 40 mins since 01-01-1990. I did this by dividing it by 2400 (seconds in 40 mins). The main purpose is to have a time frame for the sessions.
I used the following code,
CREATE OR REPLACE FUNCTION ssnDate( DATE IN VARCHAR2 DEFAULT 03-01-18, TIME IN VARCHAR2 ) RETURN NUMBER AS BEGIN RETURN TRUNC((to_date(DATE||' '||TIME, 'DD-MM-YY HH:MM:SS')- to_date('01-JAN-1990','DD-MON-YYYY')) * (86400/2400); END ssnDate;
This was what appeared in the log after running the statement,
FUNCTION ssnDate compiled
Warning: execution completed with warning
After this, I tried to create a VIEW to transform the DATE and TIME with the ssnDate that was created earlier on, and concatenate the CS_URI_STEM (which is the resource accessed), and CS_URI_QUERY (which is the the query, if any, the client was trying to perform)into a new field called WEB_LINK.
This is the code used,
CREATE OR REPLACE VIEW WEBLOG_VIEWS("C_IP", "WEB_LINK", "CS_USER_AGENT", "SESSION") AS SELECT ssnDate(LOG_DATE, LOG_TIME) AS 'SESSION', C_IP, CS_USER_AGENT, (CS_URI_STEM||'?'||CS_URI_QUERY) AS WEB_LINK FROM WEBLOG;
Now from this I got the following error..
Error starting at line 1 in command:
CREATE OR REPLACE VIEW WEBLOG_VIEWS("C_IP", "WEB_LINK", "CS_USER_AGENT", "SESSION")
SELECT ssnDate(LOG_DATE, LOG_TIME) AS 'SESSION',
(CS_URI_STEM||'?'||CS_URI_QUERY) AS WEB_LINK
Error at Command Line:3 Column:38
SQL Error: ORA-00923: FROM keyword not found where expected
00923. 00000 - "FROM keyword not found where expected"
I don't get where I'm going wrong with this.. This is the data preparation stage which requires me to prep the data before applying modeling techniques or algorithms.. The next step would be grouping the data, based on the session time, ip and the user agent of each session along with the web_links fields visited by the user in that session.
I would really be grateful for any inputs on where I'm going wrong and any solutions for that!