Join and Multiple where clauses: which is better??

There was an argument between a colleague and I. He prefers building his views joining many tables with many where clause while I am cute with my join which is simpler and more understandable for me. So, it started an argument on which is a superior way of joining tables.
I will actually like to know we is faster and better: using JOINs or using multiple where clauses to retrieve values from multiple tables.?

Dave:
"Are we talking about the difference between Oracle Joins and ANSI Joins?
e.g.
Select d.dept_name, e.emp_name
from dept d, emp e
where d.dept_id = e.dept_id"
That is not really an "Oracle Join". That syntax works on just about every SQL database I have ever worked with. The (+) syntax for an outer join is Oracle specific, but some other databases use a similar style for outer joins (something like a.c += b.c or a.c *= b.c).
OP:
There are things you can do with the ANSI style syntax that either cannot be done, or cannot be done as easily, with Oracle's syntax. Most notably, outer joining one table to more than one other tables, and FULL OUTER joins.
Having said that, in my experience, both are rather rare occurrences, so I tend to stick to doing the jopins in the WHERE clause because that is what I am used to.
John

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                                       PI.linkto AS PIto,
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                                       PI.content_id AS PIc,
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    user512743 wrote:
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    CREATE TABLE VW_LIVEPROCESSOPTION_SIM_v6
    (     "OPTION_ID" NUMBER,
         "QUESTION_ID" NUMBER(10,0),
         "PROCESS_ID" NUMBER(10,0),
         "OPT_INNERTEXT" VARCHAR2(200 CHAR),
         "OPT_LINKFROM" VARCHAR2(20 CHAR),
         "OPT_LINKTO" VARCHAR2(20 CHAR),
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         "LIBOPTION_IDFK" NUMBER
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    (     "QUESTION_ID" NUMBER(10,0),
         "PROCESS_ID" NUMBER(10,0),
         "INNERTEXT" VARCHAR2(200 CHAR),
         "ITEMTYPE" VARCHAR2(50 CHAR),
         "LINKFROM" VARCHAR2(500 CHAR),
         "LINKTO" VARCHAR2(500 CHAR),
         "ASSOCIATED" VARCHAR2(200 CHAR),
         "CONTENT_ID" NUMBER,
         "EXITPOINT1_ID" NUMBER(10,0),
         "EXITPOINT2_ID" NUMBER(10,0),
         "EXITPOINT3_ID" NUMBER(10,0),
         "RESOLVEIDENTIFIER" VARCHAR2(40 CHAR),
         "LIBQUESTION_IDFK" NUMBER(10,0),
         "FOLLOWONCALL" NUMBER(1,0),
         "USERINPUT" VARCHAR2(200 CHAR),
         "ISLOCKED" NUMBER(1,0),
         "PREVIOUSANSWER" NUMBER(1,0),
         "VISIBLETOAGENT" NUMBER(1,0),
         "RETRYATTEMPT" NUMBER(10,0),
         "TAGS" VARCHAR2(50 BYTE)
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    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (10,450,'Issue Resolved','ExitPoint','9.1',null,null,null,1,6,122,null,null,null,null,null,null,null,null,null);
    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (11,450,'Change the security level to Disabled. Is the customer able to browse the internet?','Question','9.2,8.2','11.2,11.1',null,281,null,null,null,null,null,null,null,null,null,null,null,null);
    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (12,450,'Change the security level to Standard. Is the customer able to browse the internet now?','Question','11.1,8.3,8.4','12.2,12.1',null,283,null,null,null,null,null,null,null,null,null,null,null,null);
    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (13,450,'Issue Resolved','ExitPoint','12.1',null,null,null,1,6,123,null,null,null,null,null,null,null,null,null);
    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (14,450,'Ask the customer to perform a master reset. Does this resolve their issue?','Question','12.2,11.2','14.2,14.1',null,282,null,null,null,null,null,null,null,null,null,null,null,null);
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    Insert into VW_LIVEPROCESSITEM_SIM_v6 (QUESTION_ID,PROCESS_ID,INNERTEXT,ITEMTYPE,LINKFROM,LINKTO,ASSOCIATED,CONTENT_ID,EXITPOINT1_ID,EXITPOINT2_ID,EXITPOINT3_ID,RESOLVEIDENTIFIER,LIBQUESTION_IDFK,FOLLOWONCALL,USERINPUT,ISLOCKED,PREVIOUSANSWER,VISIBLETOAGENT,RETRYATTEMPT,TAGS) values (16,450,'Issue Resolved','ExitPoint','14.1',null,null,null,1,6,123,null,null,null,null,null,null,null,null,null);
    CREATE TABLE "LIVEPROCESS_EC_V"
    (     "PROCESS_ID" NUMBER(10,0),
         "USER_ID" NUMBER(10,0),
         "CREATED" TIMESTAMP (6)
    Insert into LIVEPROCESS_EC (PROCESS_ID,USER_ID,CREATED) values (450,7460,to_timestamp('21-APR-08 09.34.41.000000000 AM','DD-MON-RR HH.MI.SS.FF AM'));
    Required O/P in XML format
    <P>
    <Ppid>450</Ppid>
    <PI>
    <PIqid>1</PIqid>
    <PIpid>450</PIpid>
    <PItext>CBB1015 - Router Firewall Settinngs Process</PItext>
    <PItype>Title</PItype>
    <PIto>2</PIto>
    <PO />
    </PI>
    <PI>
    <PIqid>2</PIqid>
    <PIpid>450</PIpid>
    <PItext>Is the customers PC Firewall turned off?</PItext>
    <PItype>Question</PItype>
    <PIfrom>1</PIfrom>
    <PIto>2.2,2.1</PIto>
    <PO>
    <POoid>1</POoid>
    <POqid>2</POqid>
    <popid>450</popid>
    <POtext>Yes</POtext>
    <POto>5</POto>
    </PO>
    <PO>
    <POoid>2</POoid>
    <POqid>2</POqid>
    <popid>450</popid>
    <POtext>No</POtext>
    <POto>3</POto>
    </PO>
    </PI>
    <PI>
    <PIqid>3</PIqid>
    <PIpid>450</PIpid>
    <PItext>Advise the customer to turn off the PC Firewall in order to continue. Has this been done?</PItext>
    <PItype>Question</PItype>
    <PIfrom>2.2</PIfrom>
    <PIto>3.2,3.1</PIto>
    <PIc>278</PIc>
    <PO>
    <POoid>1</POoid>
    <POqid>3</POqid>
    <popid>450</popid>
    <POtext>Yes</POtext>
    <POto>5</POto>
    </PO>
    <PO>
    <POoid>2</POoid>
    <POqid>3</POqid>
    <popid>450</popid>
    <POtext>No</POtext>
    <POto>4</POto>
    </PO>
    </PI>
    <PI>
    <PIqid>4</PIqid>
    <PIpid>450</PIpid>
    <PItext>Advise the customer the PC Firewall must be switched off before this process????</PItext>
    <PItype>ExitPoint</PItype>
    <PIfrom>3.2</PIfrom>
    <PIe1>14</PIe1>
    <PO />
    </PI>
    <PI>
    <PIqid>5</PIqid>
    <PIpid>450</PIpid>
    <PItext>Is the customer able to access the internet now?</PItext>
    <PItype>Question</PItype>
    <PIfrom>3.1,2.1</PIfrom>
    <PIto>5.2,5.1</PIto>
    <PO>
    <POoid>1</POoid>
    <POqid>5</POqid>
    <popid>450</popid>
    <POtext>Yes</POtext>
    <POto>6</POto>
    </PO>
    <PO>
    <POoid>2</POoid>
    <POqid>5</POqid>
    <popid>450</popid>
    <POtext>No</POtext>
    <POto>8</POto>
    </PO>
    </PI>
    <PI>
    <PIqid>6</PIqid>
    <PIpid>450</PIpid>
    <PItext>Is the customer having a problem with a specific website?</PItext>
    <PItype>Question</PItype>
    <PIfrom>5.1</PIfrom>
    <PIto>6.2,6.1</PIto>
    <PO>
    <POoid>1</POoid>
    <POqid>6</POqid>
    <popid>450</popid>
    <POtext>Yes</POtext>
    <POto>7</POto>
    </PO>
    <PO>
    <POoid>2</POoid>
    <POqid>6</POqid>
    <popid>450</popid>
    <POtext>No</POtext>
    <POto>8</POto>
    </PO>
    </PI>
    <PI>
    <PIqid>7</PIqid>
    <PIpid>450</PIpid>
    <PItext>1536: CBB1008 - Browser Setup and Daignostics</PItext>
    <PItype>SubProcess</PItype>
    <PIfrom>6.1</PIfrom>
    <PIas>1536-1-0</PIas>
    <PO />
    </PI>
    <PI>
    <PIqid>8</PIqid>
    <PIpid>450</PIpid>
    <PItext>What is the security level on the CPE Management page?</PItext>
    <PItype>Question</PItype>
    <PIfrom>6.2,5.2</PIfrom>
    <PIto>8.4,8.3,8.2,8.1</PIto>
    <PIc>279</PIc>
    <PO>
    <POoid>1</POoid>
    <POqid>8</POqid>
    <popid>450</popid>
    <POtext>Block All</POtext>
    <POto>9</POto>
    </PO>
    <PO>
    <POoid>2</POoid>
    <POqid>8</POqid>
    <popid>450</popid>
    <POtext>Standard</POtext>
    <POto>11</POto>
    </PO>
    <PO>
    <POoid>3</POoid>
    <POqid>8</POqid>
    <popid>450</popid>
    <POtext>Disabled</POtext>
    <POto>12</POto>
    </PO>
    <PO>
    <POoid>4</POoid>
    <POqid>8</POqid>
    <popid>450</popid>
    <POtext>User Defined</POtext>
    <POto>12</POto>
    </PO>
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    <PO>
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    <PIe2>6</PIe2>
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    <PIpid>450</PIpid>
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    <PIfrom>14.1</PIfrom>
    <PIe1>1</PIe1>
    <PIe2>6</PIe2>
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    <PO />
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