Pivot summary Oracle Apex - oracle

When I run report of oracle apex, pivot summary interactive report raised error, numeric or value error.

It sounds like your select statement is wrong. Perhaps add more information to your question?

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Oracle Apex return specific values from PL/SQL into a item

I'm using apex 4.0 and I've currently got a SQL query that looks up a table information with SUM and includes simple math with a case statement that display OK if it tallies up or NOT okay if it doesn't in a separate row,
In apex if I use PL/SQL can I return the values specific values specifically the OK to an ITEM in apex to be used elsewhere? I've searched and cannot find anything exact likely because I'm currently ensure on the correct term.
If you have a page item called P123_FOO then you can do this in a page process:
select <whatever>
into :P123_FOO
from <whatever>;
The usual exceptions will be raised if the query returns no rows or more than one.

Evisions Argos - Execute a procedure before the report

We are migrating some reports from Oracle Reports to Evisions Argos. And in Oracle reports, there was a "Before Report" trigger, that would get fired before the actual running of the report query. This allowed us to fill some tables before the query and keep the whole business logic in the report itself. Is it possible to do something like this in Argos? Where could you execute PL/SQL code before running the query for the report? Either at the report or the datablock could work for us.
You can add a dataset to the report and call the procedure(enclosed with begin/end) there.

Crystal Reports Issue turning a string into a number

I'm having one of those throw the computer out the window days.
I am working on a problem involving Crystal Reports (Version 10) and an Oracle Database (11g).
I am taking a view from the database that returns a string (varcahr2(50)) which is actually a number, when a basic SELECT * query is run on this view I get the number back in the format 000000000000100.00.
When this view is then used in Crystal Reports I can view the field data, but I can't sum the data as it is not a number.
I began, by attempting to using ToNumber on the field, to which Crystal's response was that the string was not numeric text. Ok fair enough, I went back to the view and ran TO_NUMBER, when this was then used in crystal it did not return any results. I also attempted to run TO_CHAR on the view so that I could hopefully import the field as text and then perform a ToNumber, yet the same as with the TO_NUMBER no records were displayed.
I've started new reports, I've started new views. No avail.
This seems to have something to do with how I am retrieving the data for the view.
In simplistic terms I'm pulling data from a table looking at two fields a Foreign Key and a Value field.
SELECT PRIMARY_KEY,
NVL(MAX(DECODE(FOREIGN_KEY, FOREIGN_KEY_OF_VALUE_I_NEED, VALUE_FIELD)), 0)
FROM MY_TABLE
GROUP BY PRIMARY_KEY
When I attempted to put modify the result using TO_NUMBER or TO_CHAR I have used it around the VALUE_FIELD itself and the entire expression, wither way works when the run in a SQL statement. However any TO_NUMBER or TO_CHAR modification to the statement returns no results in Crystal Reports when the view is used.
This whole problem smacks of something that is a tick box or equivalent that I have overlooked.
Any suggestions of how to solve this issue or where I could go to look for an answer would be greatly appreciated.
I ran this query in SQL Developer:
SELECT xxx, to_number(xxx) yyy
FROM (
SELECT '000000000000100.00' XXX FROM DUAL
)
Which resulted in:
XXX YYY
000000000000100.00 100
If your field is truly numeric, you could create a SQL Expression field to do the conversion:
-- {%NUMBER_FIELD}
TO_NUMBER(TABLE.VALUE_FIELD)
This turned out to be an issue with how Crystal Reports deals with queries from a database. All I needed to do was contain my SQL statement within another Select Statement and on this instance of the column apply the TO_NUMBER so that Crystal Reports would recognize the column values as numbers.
Hopefully this helps someone out, as this was a terrible waste of an afternoon.

Oracle DB audit trails

Someone (or something) actually updated a value in my table wrongly. I am trying to find out when the update happened. Unfortunately, there is no audit trigger being created for the said table.
Is there other ways or logs that I can check and verify what SQL statements were run at what time?
I had tried to look at v$sql table, but I don't think that table is capturing all the SQL statements being performed on the database. E.g. I specifically did an UPDATE statement, but it is not captured in the v$sql table.
Can I look at the redo.log? However, I do not know how to interpret this log.
Your only real option is logminer, which isn't for the faint of heart.
The documentation is here: http://docs.oracle.com/cd/B19306_01/server.102/b14215/logminer.htm
v$sql rows may get aged out after a while. Did you account for case sensitivity when looking in v$sql?
select * from v$sql where upper(sql_fulltext) like '%UPDATE%';

Oracle Execution Plan

I am using Oracle 11g and Toad for Oracle. How can I display execution plan for queries?
In Sql server management studio execution plan can be displayed as graphical format. Is there any functionality/tool like that on Toad for oracle?
CTRL-E
Make sure you've ended the query with a semi-colon (and the query above)
Edit:
You need to set-up the TOAD plan table for use. If you think it's already setup on your DB then you may just need to be granted access. Alternatively in my slightly older version of TOAD it's under:
Database --> Administer --> Server Side Objects Wizard. From here you can create the plan table(s) in a schema that you choose.
You should create the PLAN_TABLE using a script provided by Oracle
which is named UTLXPLAN.SQL and is located in one of the installation folders
on the database server.
Then, you should use the EXPLAIN PLAN statement for generating a plan for a SQL statement, like this:
EXPLAIN PLAN SET STATEMENT_ID = 'your_identifier_for_this_plan'
FOR
... your statement ... ;
Then, you can use either a select from PLAN_TABLE (usually using a hierarchical query) or the DBMS_XPLAN.DISPLAY_PLAN procedure to display the plan.
In the same folder where the UTLXPLAN.SQL file is located, there usually exist
examples of using this procedure.
Also, in SQL*PLUS you can use the SET AUTOTRACE feature.
For TOAD FOR ORACLE
this helped me How do I view the Explain Plan in Oracle Sql developer?, I just write what they did in sql developer and wrote in the toad editor and then execute.
Example
explain plan for select field1, field2 from TABLE_NAME;
SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY);
Check that all queries end with a semicolon, put the cursor on the query you want to analyze and hit CTRL-E.
The first time you could get a popup that asks for the name of the plan table, it suggests TOAD_PLAN_TABLE but it's better to use the standard Oracle table PLAN_TABLE that should be already available. So enter PLAN_TABLE in place of TOAD_PLAN_TABLE (do not specify a schema) and hit OK. You should get a message saying that the object already exists: hit OK again to acknowledge it. Now try CTRL-E again and you'll get the explain plan.
To view/change the currently configured plan table name go to menu "View / Toad Options / Oracle General".

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