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.
Related
I'm running Apex 19.2 and I would like to create a classical or interactive report based on dynamic query.
The query I'm using is not known at design time. It depends on an page item value.
-- So I have a function that generates the SQL as follows
GetSQLQuery(:P1_MyItem);
This function may return something like
select Field1 from Table1
or
Select field1,field2 from Table1 inner join Table2 on ...
So it's not a sql query always with the same number of columns. It's completely variable.
I tried using PL/SQL function Body returning SQL Query but it seems like Apex needs to parse the query at design time.
Has anyone an idea how to solve that please ?
Cheers,
Thanks.
Enable the Use Generic Column Names option, as Koen said.
Then set Generic Column Count to the upper bound of the number of columns the query might return.
If you need dynamic column headers too, go to the region attributes and set Type (under Heading) to the appropriate value. PL/SQL Function Body is the most flexible and powerful option, but it's also the most work. Just make sure you return the correct number of headings as per the query.
How can I use a plsql code block like this with an Interactive Grid (Using Oracle Apex) :
begin
Query A;
exception when no_data_found then
Query B;
end;
Actually sometimes 'Query A' returns nothing and I want to run 'Query B'. any solution?
An interactive grid has to use a sql-query as source.
a. Write one query and use sql-query as source:
SELECT * FROM A
UNION ALL
SELECT * FROM B WHERE COUNT(SELECT * FROM A) = 0;
b. Write some function which does the work
Read this:
How to return a resultset / cursor from a Oracle PL/SQL anonymous block that executes Dynamic SQL?
But it sounds a little bit strange, that you got one grid for two datasources. This will bring up some problems when manipulating the data.
Open questions
Do you want to modify the data?
Do you want to insert new rows?
Does the user understand what's going on and what he is seeing?
Since there is no apparent way to NOT use an SQL query as the Interactive Grid source, you could maybe (depending on your specific solution) think differently and create an Interactive Grid region for each query. Then you could show one or another when the page loads, using a region server-side condition or even a Dynamic Action.
To expand on other answers with a little specificity, since this is about managing results of 2 different queries, you can put the 2 different queries in 2 different Grid regions. Then on the first region add a Server-side Condition of "Rows returned" and copy the SQL Query into the query input provided. On the 2nd region, you would set "No Rows returned" condition and again copy Query 1 into the SQL input provided.
Oracle Forms 10g - 'NULLS' is not accepted.
In program unit(PL/SQL Code) I use NULLS FIRST and its throwing error.
Encountered the symbol NULLS
select line_id
from oe_order_lines_all
where rownum <5
order by line_id NULLS FIRST;
kindly help
I am not familiar with forms, but a simple workaround (if it works) is to modify the order by clause. For example, assuming the line id's are positive, or at least non-negative, you could
order by nvl(line_id, -1)
The flavour of PL/SQL and SQL used in Forms is different and somewhat older than the one available in the database. Being able to run code on the database does not mean it will run without changes in Forms. Analytic functions is an example of a newer SQL feature which is missing in Forms. But you can always put your code into a PL/SQL package in the database and call it from your forms code.
I have a database table named LAND_MANAGEMENT. I am using a button to view the records in a datablock. I want to view the records in ascending orders but I couldn't manage to do so using the following code . Records are shown but not in any particular order.
Using the following execute_query under When-Button-Pressed trigger.
GO_ITEM('LAND_MANAGEMENT.SL_NO');
EXECUTE_QUERY;
FIRST_RECORD;
Oracle Forms uses the Block as its main architectural unit. So you GO_ITEM() is navigating to the LAND_MANAGEMENT block. Then the EXECUTE_QUERY() call issues the SELECT statement associated with that block and retrieves the data. If none is specified it defaults to select * from the table the block is built on, LAND_MANAGEMENT in this case.
You are not happy with the ordering of the result set. This suggests that the query doesn't have an explicit ORDER BY clause. It's simple to add one: fire up the Block Properties editor in Forms Builder and edit Database > Order By Clause . (Precise navigation may vary depending on your version of Builder.)
Alternatively you can set the sort order with a call:
set_block_property('LAND_MANAGEMENT', order_by, 'SL_NO asc');
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.