Select from from T1,T2
Hi,
Can anybody help me how to explain this select on those 2 tables, I'm stuck with line #3, marked with "xxx", is it just for JOIN, no columns select but T2 brought into Select for further predicate evaluation?
This is piece of one example, where we have to to filter only those records from first table where all sub_item_cd exists in second table, ie.
item_cd
1010
1012
But it doesn't matter for this question, just trying to digest logic of this Select. I can see that even output for lines1,2,3 produce some cortesian product that I can't explain.
Tx all
T
select t1.item_cd ----- #1
from t1, ------#2
(select distinct sub_item_cd from t2 ) t2 --------#3/* xxx */
where t1.sub_item_cd = t2.sub_item_cd(+) --------#4
group by t1.item_cd --------#5
having max(decode( t2.sub_item_cd, NULL, 1, 0 )) = 0 ---------#6
T1::::
item_cd sub_item_cd
1010 A
1010 B
1010 C
1011 A
1011 D --/* D not in T2
1012 A
T2::::
sub_item_cd
A
A
A
B
B
C
B
C
Hi,
trento wrote:
Hi,
Can anybody help me how to explain this select on those 2 tables, I'm stuck with line #3, marked with "xxx", is it just for JOIN, no columns select but T2 brought into Select for further predicate evaluation?
This is piece of one example, where we have to to filter only those records from first table where all sub_item_cd exists in second table, ie.
item_cd
1010
1012
But it doesn't matter for this question, just trying to digest logic of this Select. I can see that even output for lines1,2,3 produce some cortesian product that I can't explain.
select t1.item_cd ----- #1
from t1, ------#2
(select distinct sub_item_cd from t2 ) t2 --------#3/* xxx */
where t1.sub_item_cd = t2.sub_item_cd(+) --------#4
group by t1.item_cd --------#5
having max(decode( t2.sub_item_cd, NULL, 1, 0 )) = 0 ---------#6
Line #3 contains an In-Line View , where the result set of that sub-query is used as a table. When "t2" is referenced elsewhere (lines #4 and #6) it is the sub-query called t2, not the table with the same name, that is being referenced. (By the way, it's confusing to use the a column alias that's the same as a table name in the same query.)
As Marcus said, there's no point in using a sub-query in this case; you might as well use the raw t2 table.
I find the use of MAX and DECODE in the HAVING clause to be confusing. I think a better way to get the same results is:
SELECT t1.item_cd
FROM t1
, t2
WHERE t1.sub_item_cd = t2.sub_item_cd (+)
GROUP BY t1.item_cd
HAVING COUNT (*) = COUNT (t2.sub_item_cd)
;I don't follow what you're saying about a Cartesian product. A Cartesian Product (or Cartesian Join or Cross Join ) occurs when a table is not related to another table in the same query by any join conditions. There is no Cartesian join in the code you posted. There are only 2 tables in the main query, and they are related by this join condition:
where t1.sub_item_cd = t2.sub_item_cd(+) --------#4The in-line view references only 1 table; it has no join, Cartesian or otherwise.
When you don't post any sample data (CREATE TABLE and INSERT statements), then you can't expect any code that's posted in reply to be tested, so don't blame Marcus for posting a reply that doesn't do what you want.
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AnilA stored procedure would only slow you down here if it was poorly written. I suspect you want to use the translate function. I'm cutting & pasting examples from the documentation-- a search at tahiti.oracle.com will give you all the info you'll need.
Examples
The following statement translates a license number. All letters 'ABC...Z' are translated to 'X' and all digits '012 . . . 9' are translated to '9':
SELECT TRANSLATE('2KRW229',
'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ',
'9999999999XXXXXXXXXXXXXXXXXXXXXXXXXX') "License"
FROM DUAL;
License
9XXX999
The following statement returns a license number with the characters removed and the digits remaining:
SELECT TRANSLATE('2KRW229',
'0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ', '0123456789')
"Translate example"
FROM DUAL;
Translate example
2229
Also, LIKE '%<string>%' is going to be rather expensive simply because it has to compare the entire string and because it forces full table scans, rather than using indexes. You could speed this sort of query up by using interMedia Text (Oracle Text now in 9i). If you can eliminate one of the '%' options, you could also improve things.
My guess is that your stored procedure is inefficient and that's causing the problem-- 5k rows per table should be pretty trivial.
If you post your query over on the PL/SQL forum, there are better performance tuners than I that might have more hints for you. To get really good advice, though, you'lllikely have to get at least the execution plan for this statement and may need to do some profiling to identify the problem areas.
Justin -
Getting selected item from combobox itemrenderer and storing in object
Hi Guys,
Can anyone help me in this regard. Its very urgent.
I have a combo box itemrenderer in datagrid column. I want to get the user selected item from the dropdown of the row(s) (User may select values from combo box from multiple rows of datagrid) and corressponding values of all other columns of the rows and store it in an object . Then pass this object to database to update only those rows that user has changed.
I am able to get the selected item from combo box using "event.currentTarget.selectedItem" and corressponding values of all other columns of the rows using "valueSelect.ID", etc where valueSelect is object which contains data for datagrid. But am stuck up with, how to store the selected item value of the combobox and corressponding values of all other columns of the rows into an Object ?.
Can anybody help me with sample to store selected item from combobox and its corressponding values of all other columns into an object which i can send to db...?
Kindly help me in this regard.
Thanks,
Anand.Hi!
Are you using a collection of VO or DTO as the dataprovider of the combobox component?
If so, have you created some attribute there to control the user's selection in the combobox?
For instance:
private var selected:Boolean = false;
If your solution fits this approach, you may create a new collection that contains just the objects that were selected by the user, it means you can loop through the datagrid's dataprovider and only insert in this new collection those objects that have the attribute "selected" set to true.
For instance:
private function getSelectedRecords(datagridDataProvider:ArrayCollection):ArrayCollection
var newCollection:ArrayCollection = new ArrayCollection();
for each (var item:Object in datagridDataProvider)
if (item.selected)
newCollection.addItem(item)
return newCollection;
Afterwards, you may serialize this new collection with your back-end.
Hope it helps you!
Cheers,
@Pablo_Souza -
How to get selected value from selectOneRadio ???
Hi...i want to how to get selected value from selectOneRadio and use it in another page and in backing bean.
Note i have about 10 selectOneRadio group in one page i want to know value of each one of them.
Plzzzzzzzz i need helpYou have a datatable in which each row is a question, correct?
Also in each row you have 5 possible answers that are in a radio, correct?
So,
You need to put in your datatable model, a question, and a list of answers (5 in yor case) and the selected one.
So you will have a get to the question, an SelectItem[] list to populate the radios and another get/set to the selected question.
ex:
<h:selectOneRadio value="#{notas.selectedString}" id="rb">
<f:selectItem itemValue="#{notas.valuesList}"/>
</h:selectOneRadio>
Search the web for examples like yours. -
How to get selected value from OADefaultListBean.
Hi All,
How to get selected value from OADefaultListBean ?
Thanks,Hi,
To identify the user's selection(s) when the page is submitted, you would add the following logic to your processFormRequest() method:
OADefaultListBean list =
(OADefaultListBean)webBean.findChildRecursive("positionsList");
String name = list.getName();
String[] selectedValues = pageContext.getParameterValues(name);
To retrieve all the values in the list box, call list.getOptionsData().
--Prasanna -
How to get selected values from selectManyCheckbox ?
Hi,
I am a SOA developer and using 'Auto generated adf form' of Human Task. I did some customization in the form. I need to show one dynamic list (contains multiple string values) on a form, from which user will select desired values. For this I have used <af:selectManyCheckbox> adf component.
It has generated code as follows...
<af:selectManyCheckbox value="#{bindings.Response.inputValue}"
label="#{bindings.Response.label}"
id="smc1">
<f:selectItems value="#{bindings.Response.items}" id="si9"/>
</af:selectManyCheckbox>
I am able to show list on a form and can select multiple values also.
Now, I want the multiple selected values back in my BPEL process. I need only those values which are selected by user.
Currently I am getting complete list as it is back in BPEL process.
Please help me out..!
Thanks..
SurajUnwinding ADF: How to retrieve Selected Items from selectManyCheckbox using ValueChnageListener
-
How to get selected values from tableSelectMany
Hi all,
I have a view object which displays all column names of a table. I created a tableselectmany table with the view object.
the user has to select some rows (for mining function).
how to get the selected rows from tableselectmany table?
what should be in 'action' and 'actionlistener' ?
thanks in advance.test(Set<Key> empKeys){
System.out.println("Inside function");
for(Key keys:empKeys){
Row[] row = getCollectionsView1().findByKey(keys,1);
EewCollectionsViewRowImpl vo = (CollectionsViewRowImpl)row[0];
In the action just call this method(test)
and pass the argument as #{applicationScope.managedBean.firstProperty.selectionState.keySet}
I hope this works for you. -
How to get selected value from SelectOneChoice
Hi,
I'm facing a problem to get selected value from SelectOneChoice. I have valueChangeListener event on a (SelectOneChoice)item. After user makes a choice I want to store selected value in a bean property to pass it to a method.
For example List item shows dname from dept table after user makes a choice I want to get deptno and populate into bean which I use to pass into my method.
If I use valueChangeEvent.getNewValue() I always get negative value instead I want deptno selected. Sample code pasted below.
public void setDeptno(ValueChangeEvent valueChangeEvent) {
BindingContainer b = getBindings();
OperationBinding oB = b.getOperationBinding("setDeptno");
//Checking instance of because same method is called from another text inputText item.
if (valueChangeEvent.getSource() instanceof CoreSelectOneChoice){
CoreSelectOneChoice cN = (CoreSelectOneChoice)valueChangeEvent.getSource();
if (columnName.getId().toString().equals("deptDname")){
JSFUtils.setManagedBeanValue("dept.deptDeptno",valueChangeEvent.getNewValue());
}if your selectOneChoice has value equal to #{bindings.deptno} bound to the iterator Dept1Iterator,
then the backing code will look more like
public void setDeptno(ValueChangeEvent valueChangeEvent) {
BindingContainer b = getBindings();
OperationBinding oB = b.getOperationBinding("setDeptno");
//Checking instance of because same method is called from another text inputText item.
if (valueChangeEvent.getSource() instanceof CoreSelectOneChoice){
CoreSelectOneChoice cN = (CoreSelectOneChoice)valueChangeEvent.getSource();
if (columnName.getId().toString().equals("deptDname")){
FacesContext ctx = FacesContext.getCurrentInstance();
Application app = ctx.getApplication();
ValueBinding bind = app.createValueBinding("#{bindings.Dept1Iterator.currentRow}");
Row row = (Row)bind.getValue(ctx);
JSFUtils.setManagedBeanValue("dept.deptDeptno", row.getAttribute("deptno"));
} I haven't tested it, so it could perfectly not work at all -
Dvt:pivotFilterBar - how to get selected values from filter
Hi all,
I have a question: how to programmatically get selected values from pivot table's filter bar?
I have tried to use
pivotTable.getDataModel().getDataAccess().getValueQDR(startRow, startCol, DataAccess.QDR_WITH_PAGE);but for page edge dimensions it returns BAD DATA, it seems that it returns some cached values.
Environment: JDev 11.1.1.3.0 without any patches.
thanks,
MiroslawHi,
You can retrieve the selected value in the PivotFilterBar through the model of PivotFilterBar, instead of dataaccess:
// get the model from the pivot filter bar instance
QueryDescriptior queryDescriptor = (QueryDescriptor)pivotFilterBar.getValue();
// retrieve a list of criterion, each one is used to populate each lov within the pivot filter bar
ConjunctionCriterion conjunctionCriterion = queryDescriptor.getConjunctionCriterion();
List<Criterion> criterionList = conjunctionCriterion.getCriterionList();
for (int i=0; i<_criterionList.size(); i++) {
AttributeCriterion criterion = (AttributeCriterion)criterionList.get(i);
// _selected is the currently selected value
Object selected = criterion.getValues().get(0);
System.out.println(_selected);
Hope that helps,
Chadwick
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