I have an Interactive Report which I'm generating using a collection.
select apex_item.checkbox(1,'obj_name') ' ',
col 01,
col 02
from apex_collections where collection_name='XYZ';
The table on which this report is being generated has a composite primary key,
so when the user selects multiple checkboxes, I'm not able to figure out how to identify which all rows were selected by user. This is because according to my knowledge, through p_value in apex_item.checkbox(p_idx,p_value) I can just pass one column/field/item. But the requirement is to pass both obj_name and col 01 back to the pl/sql code.
To explain it better, I have an on submit process associated to it.
FOR I in 1..APEX_APPLICATION.G_F01.COUNT LOOP
DELETE FROM abc
WHERE obj_name = (APEX_APPLICATION.G_F01(i))
AND tab_col = col 01;
END LOOP;
So how can I send the value of col 01 of the selected checkboxes to the above process is what my question is. Any help would be great.
A better approach which I've found now is using rownum as unique value, that actually reduces a lot of logic in my code. Just calling it out.
Could you concatenate the obj_name and col_name?
select apex_item.checkbox(1,'obj_name-'||col_01) ' ', from apex_collections where collection_name='XYZ';
Then in the processing section
FOR I in 1..APEX_APPLICATION.G_F01.COUNT LOOP
my_object_name := substr( G_F01(i), 1, instr( G_F01(i), '-' ) - 1 );
my_column_name := substr( G_F01(i), instr( G_F01(i), '-' ) + 1 );
DELETE FROM abc WHERE obj_name = my_object_name AND tab_col = my_column_name;
END LOOP;
Related
I have columns in table something like
answeremail,
answertime,
ata,
atacomment,
ataid,
atainternalnumber,
atanumber,
atatype,
author,
becomeatafromdeviation,
becomeexternalatafrominternal,
becomefastfromothertype,
briefdescription,
city,
client_answer_attachment,
clientcomment,
confirmstatus,
created_at,
deviation,
deviationnumber,
deviationtype,
duedate,
emailsent,
financeid,
forfortnox,
fromfortnox,
is_deleted,
locked,
name,
parentata,
paymenttype,
pdfurl,
projectid,
quantity,
reason,
revisiondate,
startdate,
status,
street,
suggestion,
token,
type,
unit,
userid,
zip
I want to create SELECT statment to retrive some of this column but without specify column name something like this.
SELECT * FROM ata WHERE 'field' = 'argument'
Is there any solution for this problem or either I need to specify all those column in SELECT statment ?
Not (just) in SELECT, but in WHERE. Otherwise, how will query know which columns to check?
But - beware of datatypes. Oracle will try to implicitly convert one datatype to another. Sometimes, it'll succeed (e.g. to convert number 1 to string '1'), sometimes it'll fail (e.g. convert string 'A' to number or string 'AB23F' to date value).
Therefore, although you can try to write query which will write query for you, it might take some time to actually make it work properly. PL/SQL is probably what you'll end up with.
An example which checks all tables in my schema that contain a column named PHONE_NUMBER and searches for a row whose phone number contains 654. This script returns tables that contain such a value; you'd return something else - list of columns? All columns? Can't tell.
That's just a starting point. Good luck!
DECLARE
l_str VARCHAR2(500);
l_cnt NUMBER := 0;
BEGIN
FOR cur_r IN (SELECT u.table_name, u.column_name
FROM user_tab_columns u, user_tables t
WHERE u.table_name = t.table_name
AND u.column_name = 'PHONE_NUMBER'
)
LOOP
l_str := 'SELECT COUNT(*) FROM ' || cur_r.table_name ||
' WHERE ' || cur_r.column_name || ' like (''%654%'')';
EXECUTE IMMEDIATE (l_str) INTO l_cnt;
IF l_cnt > 0 THEN
dbms_output.put_line(l_cnt ||' : ' || cur_r.table_name);
END IF;
END LOOP;
END;
There is one short solution using xml:
https://dbfiddle.uk/?rdbms=oracle_18&fiddle=e5efc164b77a55b2ecf5d4bf85d589a5
select/*+ no_xml_query_rewrite */ *
from
xmltable(
'for $row in ora:view("SAMPLE_DATA")
let $col := $row/ROW/*[text() eq $search]
where $col ne ""
return element R {
attribute X {$col},
$row
}'
passing
'BB' as "search"
columns
found_col varchar2(30) path '#X'
,row_data xmltype path '.'
);
Results:
FOUND_COL ROW_DATA
------------------------------ ----------------------------------------------------------------------------------------------------
BB <R X="BB"><ROW><COLA>10A</COLA><COLB>BB</COLB><COLC>00</COLC></ROW></R>
BB <R X="BB"><ROW><COLA>10A</COLA><COLB>BB</COLB><COLC>10</COLC></ROW></R>
BB <R X="BB"><ROW><COLA>10A</COLA><COLB>BB</COLB><COLC>20</COLC></ROW></R>
BB <R X="BB"><ROW><COLA>10A</COLA><COLB>BB</COLB><COLC>30</COLC></ROW></R>
BB <R X="BB"><ROW><COLA>10A</COLA><COLB>BB</COLB><COLC>40</COLC></ROW></R>
From your description, I think you want to retrive the columns which spicified by the where clause only, and to omit the other columns.
I don't think this is allowed by simple sql statement. In the oracle document, at the select_list section, I can't see any solution for this question.
see https://docs.oracle.com/en/database/oracle/oracle-database/19/sqlrf/SELECT.html#GUID-CFA006CA-6FF1-4972-821E-6996142A51C6
If you really want, you can use pl/sql.
Can you please help me with the bestway to solve below problem?
Problem: I have an oracle apex page which has a report with columns as department names and employee names along with check boxes. Upon selecting the one or more checkboxes and clicking on submit button following should happen.
the pl/sql code should fetch the department names of all the selected rows from emp table.
Next it should fetch employess names under each department for the selected checkboxes.
What is the bestway to accomplish this?
Below is my code.
FOR i in 1..APEX_APPLICATION.G_F01.count
LOOP
IF APEX_APPLICATION.G_F01(i) IS NOT NULL THEN
select listagg(dept_name,',') WITHIN GROUP (ORDER BY
TESTSET_PATH) into str_dept_names from emptable
WHERE
emptable._ID=APEX_APPLICATION.G_F01(i) group by dept_name;
END IF;
END LOOP;
FOR REC IN str_dept_names
LOOP
FOR i in 1..APEX_APPLICATION.G_F01.count
LOOP
IF APEX_APPLICATION.G_F01(i) IS NOT NULL THEN
select listagg(ename,',') WITHIN GROUP (ORDER BY
dept_name) into str_enums from
emptable where dept_name LIKE
(rec.str_dept_names) and
emptable .ID
=APEX_APPLICATION.G_F01(i);
myclob:=-myclob||'java -jar test.jar -
dept'||rec.str_dept_names||str_testnums;
END IF;
END LOOP;
END LOOP;
My output in myclob should be: deptA,emp1,emp2
The apex_string package, added in Apex 5, work with nested tables, which work very well with SQL. The downside is that you have to do a conversion. So I usually do something like this, to avoid loops:
if apex_application.g_f01.count > 0 then
l_dept_ids := apex_string.split( apex_util.table_to_string(
apex_application.g_f01 ), ':' );
select listagg(dept_name,',') WITHIN GROUP (ORDER BY
TESTSET_PATH) into str_dept_names
from emptable
WHERE emptable._ID MEMBER OF l_dept_ids
end if;
I'm not sure I understand your second query enough. You're using a LIKE clause, but that seems very odd. Is id not a primary key?
I have a checkbox on my page P3_Checkbox1 that is populated from the database. How can I loop through all the checked values of my checkbox in PL/SQL code?
I assume that APEX_APPLICATION.G_F01 is used only by sql generated checkboxes and I cannot use it for regular checbox as it would not populate G_Fxx array.
I think I understand now what you're saying.
For example, suppose that the P3_CHECKBOX1 checkbox item allows 3 values (display/return):
Absent: -1
Unknown: 0
Here: 1
I created a button (which will just SUBMIT the page) and two text items which will display checked values: P3_CHECKED_VALUES and P3_CHECKED_VALUES_2.
Then I created a process which fires when the button is pressed. The process looks like this (read the comments as well, please):
begin
-- This is trivial; checked (selected) values are separated by a colon sign,
-- just like in a Shuttle item
:P3_CHECKED_VALUES := :P3_CHECKBOX1;
-- This is what you might be looking for; it uses the APEX_STRING.SPLIT function
-- which splits selected values (the result is ROWS, not a column), and these
-- values can then be used in a join or anywhere else, as if it was result of a
-- subquery. The TABLE function is used as well.
-- LISTAGG is used just to return a single value so that I wouldn't have to worry
-- about TOO-MANY-ROWS error.
with
description (code, descr) as
(select -1, 'Absent' from dual union all
select 0 , 'Unknown' from dual union all
select 1 , 'Here' from dual),
desc_join as
(select d.descr
from description d join (select * from table(apex_string.split(:P3_CHECKED_VALUES, ':'))) s
on d.code = s.column_value
)
select listagg(j.descr, ' / ') within group (order by null)
into :P3_CHECKED_VALUES_2
from desc_join j;
end;
Suppose that the Absent and Unknown values have been checked. The result of that PL/SQL process is:
P3_CHECKED_VALUES = -1:0
P3_CHECKED_VALUES_2 = Absent / Unknown
You can rewrite it as you want; this is just one example.
Keywords:
APEX_STRING.SPLIT
TABLE function
I hope it'll help.
[EDIT: loop through selected values]
Looping through those values isn't difficult; you'd do it as follows (see the cursor FOR loop):
declare
l_dummy number;
begin
for cur_r in (select * From table(apex_string.split(:P3_CHECKED_VALUES, ':')))
loop
select max(1)
into l_dummy
from some_table where some_column = cur_r.column_value;
if l_dummy is null then
-- checked value does not exist
insert into some_table (some_column, ...) valued (cur_r.column_value, ...);
else
-- checked value exists
delete from some_table where ...
end if;
end loop;
end;
However, I'm not sure what you meant by saying that a "particular combination is in the database". Does it mean that you are storing colon-separated values into a column in that table? If so, the above code won't work either because you'd compare, for example
-1 to 0:-1 and then
0 to 0:-1
which won't be true (except in the simplest cases, when checked and stored values have only one value).
Although Apex' "multiple choices" look nice, they can become a nightmare when you have to actually do something with them (like in your case).
Maybe you should first sort checkbox values, sort database values, and then compare those two strings.
It means that LISTAGG might once again become handy, such as
listagg(j.descr, ' / ') within group (order by j.descr)
Database values could be sorted this way:
SQL> with test (col) as
2 (select '1:0' from dual union all
3 select '1:-1:0' from dual
4 ),
5 inter as
6 (select col,
7 regexp_substr(col, '[^:]+', 1, column_value) token
8 from test,
9 table(cast(multiset(select level from dual
10 connect by level <= regexp_count(col, ':') + 1
11 ) as sys.odcinumberlist))
12 )
13 select
14 col source_value,
15 listagg(token, ':') within group (order by token) sorted_value
16 from inter
17 group by col;
SOURCE SORTED_VALUE
------ --------------------
1:-1:0 -1:0:1
1:0 0:1
SQL>
Once you have them both sorted, you can compare them and either INSERT or DELETE a row.
I'm trying to output a list of the courses a professor teaches, by receiving the prof's id by parameter to my function, and showing all courses, each separated by a comma. For example, if a Professor teaches Humanities, Science and Math, I want the output to be: 'Humanities, Science, Math'. However, I'm getting just 'Math,'. It only shows the last field that it found that matched with the prof's id.
CREATE OR REPLACE FUNCTION listar_cursos(prof NUMBER) RETURN VARCHAR
IS
CURSOR C1 IS
SELECT subject.name AS name FROM subject
INNER JOIN course_semester
ON subject.id = course_semester.id_subject
WHERE course_semester.id_profesor = prof
ORDER BY subject.name;
test VARCHAR(500);
BEGIN
FOR item IN C1
LOOP
test:= item.name ||',';
END LOOP;
RETURN test;
END;
/
I am aware that listagg exists, however I do not wish to use it.
In your loop, you re-assign to the test variable, instead of appending to it. This is why, at the end of the loop, it will just hold the last value of item.name.
The assignment should instead be something like
test := test || ',' || item.name
Note also that this will leave a comma at the beginning of the string. Instead of returning test, you may want to return ltrim(test, ',').
Note that you don't need to declare a cursor explicitly. The code is easier to read (in my opinion) with an implicit cursor, as shown below. I create sample tables and data to test the function, then I show the function code and how it's used.
create table subject as
select 1 id, 'Humanities' name from dual union all
select 2 , 'Science' from dual union all
select 3 , 'Math' from dual
;
create table course_semester as
select 1 id_subject, 201801 semester, 1002 as id_profesor from dual union all
select 2 , 201702 , 1002 as id_profesor from dual union all
select 3 , 201801 , 1002 as id_profesor from dual
;
CREATE OR REPLACE FUNCTION listar_cursos(prof NUMBER) RETURN VARCHAR IS
test VARCHAR(500);
BEGIN
FOR item IN
(
SELECT subject.name AS name FROM subject
INNER JOIN course_semester
ON subject.id = course_semester.id_subject
WHERE course_semester.id_profesor = prof
ORDER BY subject.name
)
LOOP
test:= test || ',' || item.name;
END LOOP;
RETURN ltrim(test, ',');
END;
/
select listar_cursos(1002) from dual;
LISTAR_CURSOS(1002)
-----------------------
Humanities,Math,Science
I'm working on displaying data from oracle.
is there a way to make the following data inside the table:
example :
'1.somedata, 2.somedata, 3.somedata, 4.somedata, 5.somedata'
to display like:
example:
'1. somedata
2. somedata
3. somedata
4. somedata
5. somedata'
on the interface?
do i add new line separator directly into the data?
or do i separator them into new line when i query it?
or is there any other simple way?
Thanks.
There are so many ways to do this, here is one if you are selecting from a column:
SELECT REPLACE ('1.somedata, 2.somedata, 3.somedata, 4.somedata, 5.somedata', ',', CHR (13) || CHR (10)) AS split
FROM DUAL;
1.somedata
2.somedata
3.somedata
4.somedata
5.somedata
I personally would use the listagg function and use '' as the delimiter.
SELECT LISTAGG(last_name, ' ')
WITHIN GROUP (ORDER BY hire_date, last_name) "Emp_list",
MIN(hire_date) "Earliest"
FROM employees
WHERE department_id = 30;
Remember that Apex is generating a web page, which means the end result is HTML. Apex, however, will also sometimes escape special HTML characters for you, like < and &. Since you're viewing a table, I assume the source of your data is a query and your "somedata" field is a single column. Try this:
SELECT REPLACE( somedata_column, ',', '<br />' )
FROM mytable
You don't say what version of Apex. In Apex 4.x, the column would need to be set to a Standard Report Column, which would stop Apex from the <br> elements. I forget what the column type is in Apex 5.x.
Check below sample query which converts coma separated list data into rows
SELECT substr( '1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,',
( case when rownum = 1 then 1
else instr( '1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,', ',', 1, rownum - 1 ) + 1
end ),
instr( substr( '1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,',
( case when rownum = 1 then 1
else instr( '1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,', ',', 1, rownum - 1 ) + 1
end )
), ',' ) - 1
) as data
FROM dual
CONNECT BY LEVEL <= length( '1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,' ) - length ( replace('1.AL,2.AL,3.AL,4.AL,5.AL,6.AL,', ',') )
Hope this will help you!