Returning only records that have no entry in a specific field

Hello,
I'm new to this forum and relatively new to Crystal Reports, so I apologize if this information is "plain as day" somewhere. I've been hunting for this info for quite a while and can't find anything that makes sense!
I am trying to put together a very simple report that will return only records where a certain field is blank.
It is an Access database, in an information management program specific to our type of business. CR 11 software was included with the LIMS (Laboratory Information Management System), as the reports generated from the LIMS software are in CR. I've learned enough to be able to tweak reports and make some basic reports, but I can't find a simple answer to what I think is a simple question!
I have the report set up to access the following fields in the database: Invoice number, Client name, Due date, Invoice amount, and Payment Received. This will be used as a "cross check" - not as any major accounting tool - as the Payment Received field is simply the date that the payment was received. If no payment has been received, the field is left blank.
I want the report to return ONLY those records where that field is blank (i. e. a list of invoices/clients whose payment has not yet been received).
Ideally, I would also like to be able to return only those records where that field is blank OR within a certain date range (i. e. less than 30 days from the date that the report is run). However, we'll probably only use this report a couple of times a month, so that is not as critical.
I know I need to filter the records according to the Payment Received field, but don't know how to construct a formula that says "just show the fields where there is nothing entered."
Thank you!
Brenda

This is the hardest function to find: IsNull
If isNull(field) then
    // if the above fails on a numberic field or text field then see the following two-some databases are picky.
If IsNull(field) or field=0 then //this one maybe needed for a numeric field
If IsNull(field) or field=""    // this one maybe needed for a text field
if IsNull(field) or field=<value>
or
if IsNull(field) or field like <value*>
You always want the IsNull statement to be the first statement, and it is especially usefull when testing for not equal
If IsNull(field) or field <> <value>

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Extract only records that have difference sum

Hi all. I'm on oracle 10g.
I have a question. I have two select statement, both with sum function.
I want that from first select I must retrieve only records which have different sum.
Here is the code:
first select statement
select a.codice_contratto codice_contratto, a.codice_qualifica codice_qualifica,
a.codice_istituzione codice_istituzione, sum(a.nume_dip_tot) tot, sum(a.nume_dip_donne) donne
from tn_bz_t_10 a
where a.anno = 2006
group by a.codice_contratto, a.codice_qualifica, a.codice_istituzione
order by a.codice_contratto, a.codice_qualifica, a.codice_istituzione
secon select statement
select codice_contratto, codice_qualifica,
codice_istituzione,
sum(nume_dip_tot17) tot, sum(nume_dip_donne17) donne
from tabella10
where anno = 2006
and versione = 'D'
and nume_dip_tot17 <> 0
group by codice_contratto, codice_qualifica, codice_istituzione
order by codice_contratto,codice_qualifica,codice_istituzione
My goal is that from first select I must retrieve only those records which have difference sum, tot or donne,
from second select...
How can I achieve that??
Thanks all for collaboration,
Fabrizio Delli Priscoli
Edited by: Fabrizio Delli Priscoli on 23-set-2010 14.25

Hi, Fabrizio,
(1) an inner join, or
(2) NOT IN
are two ways that will probably be efficient.
You've been using this forum for nearly 9 years, so you know that, to get a more detailed answer, you need to post a more detailed question.
Post a little sample data (CREATE TABLE and INSERT statements) and the results you want from that data.
Format your code and results, and post them between \ tags to keep this site from removing the extra spaces.
Always say what version of Oracle you're using.

Need help writing a MySQL query that will return only records with matching counter-parts

Since I don't know how to explain this easily, I'm using the
table below as an example.
I want to create a MySQL query that will return only records
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Notice the 'ABC / GHI' record does not have a
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How can I create a query that will do this?
id | col1 | col2
1 | ABC | DEF
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5 | GHI | DEF
*Please let me know if you have no idea what I'm trying to
explain.

AngryCloud wrote:
> Since I don't know how to explain this easily, I'm using
the table below as an
> example.
>
> I want to create a MySQL query that will return only
records that have
> matching counter-parts where 'col1' = 'ABC'.
>
> Notice the 'ABC / GHI' record does not have a
counter-matching 'GHI / ABC'
> record. This record should not be returned because there
is no matching
> counter-part. With this table, the 'ABC / GHI' record
should be the only one
> returned in the query.
>
> How can I create a query that will do this?
>
>
> id | col1 | col2
> --------------------
> 1 | ABC | DEF
> 2 | DEF | ABC
> 3 | ABC | GHI
> 4 | DEF | GHI
> 5 | GHI | DEF
>
>
> *Please let me know if you have no idea what I'm trying
to explain.
>
Please be more clear. You say that 'ABC / GHI' should not be
returned,
and then you say that 'ABC / GHI' should be the only one
returned. Can't
have both...

Include those records that have Null End Dates

I have to pull a report that show those who are currently working so we are assuming those with no End Dates are still working. When I put '0' or '0/0/00' for the End Date I get an error stating I need to put in a date.
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Thanks

Try entering some default value for null like enter a default date "1/1/1900" which means that the end date is null.
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(isnull(datefield)=true or totext(datefield)="")
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Find all records that have character alone in a string

Oracle 10g Enterprise Edition
Hi all,
I must select from a varchar2 field, all the records that have a character (number or char) alone in the string.
For example.
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Ok, just a try :
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12 select str,
13         decode(regexp_instr(str,'^. | . | .$'),0,'no',decode(regexp_instr(str,'^- | - | -$'),0,'yes','no')) res
14 from tbl;
STR             RES
ASDF BHGR H RR yes
ASDF BHGR H4 R yes
ASDF B H4 DDR   yes
ASDF BHGR H4 R1 no
ASDF BHGR H4    no
ASDF - H4       no
a1 ASDF BHGR H4 no
ASDF B H4 DDR   yes
ASDF BC 1 DDR   yes
ASDF BC / DDR   yes
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Is there any way to return back vedio that have been deleted before back up and can I cloud back up be enough , it's been deleted after less than 10 minutes by mistake

Answered here:
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Using EVDRE to return only records having a value greater than X

in the old reporting wizard you could use MDX statement like "return only those members/data where the value of some account is greater than 100".
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I have one Collection called Collection1 with the following columns:
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Hello Oliver,
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I know it's been asked before, but I haven't seen an answer I like. :-)
I have a query that includes a single column the user can update, using APEX_ITEM.TEXT(10, updateable_field, 10, 10)
I have an additional APEX_ITEM.HIDDEN(21) and APEX_ITEM.HIDDEN(22) that hold the two fields of the composite primary key. In order to track whether my updateable_field had changed, I created APEX_ITEM.HIDDEN(11, updateable_field), which I expected would hold the OLD value of the field. See where I'm going with this? :-)
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Stuck on sql query to find parent records that have the same child records

Oracle 10gR2 Enterprise Edition.
Hi,
I'm trying to write some logic to look for records in a parent table, which have the exact same values in a child table.
This is part of a bigger query, but I'm stuck on this part for now, so I've mocked up some simplified tables below to capture the core of the
problem I'm stuck on.
Let say I've got a parent table Manager, a child table Employee and there's a many to many relationship between them.
The aptly named Join_Table handles the relationship between them. So one manager can manage many employees, one employee can be managed by
many managers.
I've a feeling this is stupidly easy, but I seem to be suffering from a bad bout of brain freeze today!
-- parent table
CREATE TABLE manager (
id      number primary key,
name      varchar2(100));
-- child table
CREATE TABLE employee (
id          number primary key,
name      varchar2(100));
-- link table
CREATE TABLE join_table (
manager_id          NUMBER,
employee_id      NUMBER,
CONSTRAINT join_table_pk PRIMARY KEY (manager_id, employee_id),
CONSTRAINT manager_fk FOREIGN KEY (manager_id) REFERENCES manager(id),
CONSTRAINT employee_fk FOREIGN KEY (employee_id) REFERENCES employee(id)
-- Insert some managers
INSERT INTO manager (id, name) VALUES (1, 'John');
INSERT INTO manager (id, name) VALUES (2, 'Bob');
INSERT INTO manager (id, name) VALUES (3, 'Mary');
INSERT INTO manager (id, name) VALUES (4, 'Sue');
INSERT INTO manager (id, name) VALUES (5, 'Alan');
INSERT INTO manager (id, name) VALUES (6, 'Mike');
-- Insert some employees
INSERT INTO employee (id, name) VALUES (101, 'Paul');
INSERT INTO employee (id, name) VALUES (102, 'Simon');
INSERT INTO employee (id, name) VALUES (103, 'Ken');
INSERT INTO employee (id, name) VALUES (104, 'Kevin');
INSERT INTO employee (id, name) VALUES (105, 'Jack');
INSERT INTO employee (id, name) VALUES (106, 'Jennifer');
INSERT INTO employee (id, name) VALUES (107, 'Tim');
-- Insert the links
-- John manages Paul, Simon, Ken
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (1, 103);
-- Bob manages Paul, Simon, Kevin, Jack
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 104);
INSERT INTO join_table (manager_id, employee_id) VALUES (2, 105);
-- Mary manages Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (3, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (3, 107);
-- Sue manages Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (4, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (4, 107);
-- Alan manages Paul, Simon, Ken, Jennifer, Tim
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 103);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 106);
INSERT INTO join_table (manager_id, employee_id) VALUES (5, 107);
-- Mike manages Paul, Simon, Ken
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 101);
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 102);
INSERT INTO join_table (manager_id, employee_id) VALUES (6, 103);
-- For sanity
CREATE UNIQUE INDEX employee_name_uidx ON employee(name);So if I'm querying for manager John, I want to find the other managers who manage the exact same list of employees.
Answer should be Mike.
If I'm querying for manager Mary, answer should be Sue.
This query will give me the list of managers who manage some of the same employees as John, but not the exact same employees...
SELECT DISTINCT m.name AS manager
FROM manager m, join_table jt, employee e
WHERE m.id = jt.manager_id
AND jt.employee_id = e.id
AND e.id IN (
     SELECT e.id
     FROM manager m, join_table jt, employee e
     WHERE m.id = jt.manager_id
     AND jt.employee_id = e.id
     AND m.name = 'John')
ORDER BY 1;I thought about using set operations to find managers whose list of employees minus my employees is null and where my employees minus their list of employees is null. But surely there's a simpler more elegant way.
Any ideas?
Btw, I need to run this as a batch job against tables with >20 million rows so query efficiency is key.

What about...
WITH manager_list AS
SELECT name,
        LTRIM(MAX(SYS_CONNECT_BY_PATH(id,','))
        KEEP (DENSE_RANK LAST ORDER BY curr),',') AS employees
FROM   (SELECT m.name,
                e.id,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) AS curr,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) -1 AS prev
         FROM   manager m,
                join_table jt,
                employee e
WHERE m.id           = jt.manager_id
AND   jt.employee_id = e.id
AND   m.name = :P_MANAGER)
GROUP BY name
CONNECT BY prev = PRIOR curr AND name = PRIOR name
START WITH curr = 1
), all_list AS
SELECT name,
        LTRIM(MAX(SYS_CONNECT_BY_PATH(id,','))
        KEEP (DENSE_RANK LAST ORDER BY curr),',') AS employees
FROM   (SELECT m.name,
                e.id,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) AS curr,
                ROW_NUMBER() OVER (PARTITION BY m.name ORDER BY e.id) -1 AS prev
         FROM   manager m,
                join_table jt,
                employee e
WHERE m.id           = jt.manager_id
AND   jt.employee_id = e.id)
GROUP BY name
CONNECT BY prev = PRIOR curr AND name = PRIOR name
START WITH curr = 1
SELECT a.*
FROM   manager_list m,
       all_list a
WHERE m.employees = a.employeesWould be easier in 11g, but I don't have an installation here so this is based on 10g.
Cheers
Ben

Inserting records that have a timestamp

I have a table with field1 as "timestamp with timezone". The bulk records I am trying to load have timestamp format = "YYYY-MM-DD HH24:MI:SS.FF". I altered the session nls_timestamp_format to "YYYY-MM-DD HH24:MI:SS.FF", but get 'bad month' when loading the tables. If I add the (to_timestamp(2005-02-25 14:12:22.003222)), I can load the record without an error. I don't want to add the 'to_timestamp to thousand of records. How can I alter the nls_timestamp_format and it allow me to insert all the records.
Thanks in advance

what according to you represents the current record?
Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

Returning only records that have no entry in a specific field

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