I have a problem I am trying to solve using a query instead of VBA.
I have two fields which we'll call "FPC" and "Code". Both fields contain numbers. An FPC value will match a Code value. What I want to make sure is that once an FPC value matches a Code value, the same FPC value does not match up with a DIFFERENT Code Value and vice versa - Once a Code Value is used, I don't want the Code Value to match up with more than one FPC.
It is important to note that there are duplicate values used in both fields.
Here is an example:
FPC CODE
1 12
1 12
1 14
2 16
3 11
3 11
4 17
5 19
6 16
There are two errors here:
1. The FPC "1" is matched up with two different Code Values.
2. The Code "16" is matched up with two different FPC values.
Please let me know your suggestions. I was thinking a query would help, and then running VBA to pull the results (there is tens of thousands of records).
What is the purpose of the query? Just to identify problems? If yes then something like
select FPC, count(distinct(CODE)) from tableName where count(distinct(CODE)) >1 group by FPC
(and the converse query for CODE vs. FPC) should be OK.
Related
I´m currently working stuck on a SQL issue (well, mainly because I can´t find a way to google it and my SQL skills do not suffice to solve it myself)
I´m working on a system where documents are edited. If the editing process is finished, users mark the document as solved. In the MSSQL database, the corresponding row is not updated but instead, a new row is inserted. Thus, every document that has been processed has [e.g.: should have] multiple rows in the DB.
See the following situation:
ID
ID2
AnotherCondition
Steps
Process
Solved
1
1
yes
Three
ATAT
AF
2
2
yes
One
ATAT
FR
2
3
yes
One
ATAT
EG
2
4
yes
One
ATAT
AF
3
5
no
One
ABAT
AF
4
6
yes
One
ATAT
FR
5
7
no
One
AVAT
EG
6
8
yes
Two
SATT
FR
6
9
yes
Two
SATT
EG
6
10
yes
Two
SATT
AF
I need to select the rows which have not been processed yet. A "processed" document has a "FR" in the "Solved" column. Sadly other versions of the document exist in the DB, with other codes in the "Solved" columns.
Now: If there is a row which has "FR" in the "Solved" column I need to remove every row with the same ID from my SELECT statement as well. Is this doable?
In order to achieve this, I have to remove the rows with the IDs 2 | 4 (because the system sadly isn´t too reliable I guess) | and 6 in my select statement. Is this possible in general?
What I could do is to filter out the duplicates afterwards, in python/js/whatever. But I am curious whether I can "remove" these rows directly in the SQL statement as well.
To rephrase it another time: How can I make a select statement which returns only (in this example) the rows containing the ID´s 1, 3 and 5?
If you need to delete all rows where every id doesn't have any "Solved = 'no'", you can use a DELETE statement that will exclude all "id" values that have at least one "Solved = 'no'" in the corresponding rows.
DELETE FROM tab
WHERE id NOT IN (SELECT id FROM tab WHERE Solved1 = 'no');
Check the demo here.
Edit. If you need to use a SELECT statement, you can simply reverse the condition in the subquery:
SELECT *
FROM tab
WHERE id NOT IN (SELECT id FROM tab WHERE Solved1 = 'yes');
Check the demo here.
I'm not sure I understand your question correct:
...every document that has been processed has [...] multiple rows in the DB
I need to find out which documents have not been processed yet
So it seems you need to find unique documents with no versions, this could be done using a GROUP BY with a HAVING clause:
SELECT
Id
FROM dbo.TableName
GROUP BY Id
HAVING COUNT(*) = 1
What I am trying to do is fairly simple. I just want to add a row number to a query. Since this is in Access is a bit more difficult than other SQL, but under normal circumstances is still doable using solutions such as DCount or Select Count(*), example here: How to show row number in Access query like ROW_NUMBER in SQL or Access SQL how to make an increment in SELECT query
My Issue
My issue is I'm trying to add this counter to a multi-join query that orders by fields from numerous tables.
Troubleshooting
My code is a bit ridiculous (19 fields, seven of which are long expressions, from 9 different joined tables, and ordered by fields from 5 of those tables). To make things simple, I have an simplified example query below:
Example Query
SELECT DCount("*","Requests_T","[Requests_T].[RequestID]<=" & [Requests_T].[RequestID]) AS counter, Requests_T.RequestHardDeadline AS Deadline, Requests_T.RequestOverridePriority AS Priority, Requests_T.RequestUserGroup AS [User Group], Requests_T.RequestNbrUsers AS [Nbr of Users], Requests_T.RequestSubmissionDate AS [Submitted on], Requests_T.RequestID
FROM (((((((Requests_T
INNER JOIN ENUM_UserGroups_T ON ENUM_UserGroups_T.UserGroups = Requests_T.RequestUserGroup)
INNER JOIN ENUM_RequestNbrUsers_T ON ENUM_RequestNbrUsers_T.NbrUsers = Requests_T.RequestNbrUsers)
INNER JOIN ENUM_RequestPriority_T ON ENUM_RequestPriority_T.Priority = Requests_T.RequestOverridePriority)
ORDER BY Requests_T.RequestHardDeadline, ENUM_RequestPriority_T.DisplayOrder DESC , ENUM_UserGroups_T.DisplayOrder, ENUM_RequestNbrUsers_T.DisplayOrder DESC , Requests_T.RequestSubmissionDate;
If the code above is trying to select a field from a table not included, I apologize - just trust the field comes from somewhere (lol i.e. one of the other joins I excluded to simply the query). A great example of this is the .DisplayOrder fields used in the ORDER BY expression. These are fields from a table that simply determines the "priority" of an enum. Example: Requests_T.RequestOverridePriority displays to the user as an combobox option of "Low", "Med", "High". So in a table, I assign a numerical priority to these of "1", "2", and "3" to these options, respectively. Thus when ENUM_RequestPriority_T.DisplayOrder DESC is called in order by, all "High" priority requests will display above "Medium" and "Low". Same holds true for ENUM_UserGroups_T.DisplayOrder and ENUM_RequestNbrUsers_T.DisplayOrder.
I'd also prefer to NOT use DCOUNT due to efficiency, and rather do something like:
select count(*) from Requests_T where Requests_T.RequestID>=RequestID) as counter
Due to the "Order By" expression however, my 'counter' doesn't actually count my resulting rows sequentially since both of my examples are tied to the RequestID.
Example Results
Based on my actual query results, I've made an example result of the query above.
Counter Deadline Priority User_Group Nbr_of_Users Submitted_on RequestID
5 12/01/2016 High IT 2-4 01/01/2016 5
7 01/01/2017 Low IT 2-4 05/06/2016 8
10 Med IT 2-4 07/13/2016 11
15 Low IT 10+ 01/01/2016 16
8 Low IT 2-4 01/01/2016 9
2 Low IT 2-4 05/05/2016 2
The query is displaying my results in the proper order (those with the nearest deadline at the top, then those with the highest priority, then user group, then # of users, and finally, if all else is equal, it is sorted by submission date). However, my "Counter" values are completely wrong! The counter field should simply intriment +1 for each new row. Thus if displaying a single request on a form for a user, I could say
"You are number: Counter [associated to RequestID] in the
development queue."
Meanwhile my results:
Aren't sequential (notice the first four display sequentially, but then the final two rows don't)! Even though the final two rows are lower in priority than the records above them, they ended up with a lower Counter value simply because they had the lower RequestID.
They don't start at "1" and increment +1 for each new record.
Ideal Results
Thus my ideal result from above would be:
Counter Deadline Priority User_Group Nbr_of_Users Submitted_on RequestID
1 12/01/2016 High IT 2-4 01/01/2016 5
2 01/01/2017 Low IT 2-4 05/06/2016 8
3 Med IT 2-4 07/13/2016 11
4 Low IT 10+ 01/01/2016 16
5 Low IT 2-4 01/01/2016 9
6 Low IT 2-4 05/05/2016 2
I'm spoiled by PLSQL and other software where this would be automatic lol. This is driving me crazy! Any help would be greatly appreciated.
FYI - I'd prefer an SQL option over VBA if possible. VBA is very much welcomed and will definitely get an up vote and my huge thanks if it works, but I'd like to mark an SQL option as the answer.
Unfortuantely, MS Access doesn't have the very useful ROW_NUMBER() function like other clients do. So we are left to improvise.
Because your query is so complicated and MS Access does not support common table expressions, I recommend you follow a two step process. First, name that query you already wrote IntermediateQuery. Then, write a second query called FinalQuery that does the following:
SELECT i1.field_primarykey, i1.field2, ... , i1.field_x,
(SELECT field_primarykey FROM IntermediateQuery i2
WHERE t2.field_primarykey <= t1.field_primarykey) AS Counter
FROM IntermediateQuery i1
ORDER BY Counter
The unfortunate side effect of this is the more data your table returns, the longer it will take for the inline subquery to calculate. However, this is the only way you'll get your row numbers. It does depend on having a primary key in the table. In this particular case, it doesn't have to be an explicitly defined primary key, it just needs to be a field or combination of fields that is completely unique for each record.
I've got a postgres table (mapfeatures_20120813) with 2 columns (tags and pky) with around 1000 rows. Each row consists of a hstore and a primary key:
tags (hstore) pky
"aerialway"=>"cable_car"; 1
"aerialway"=>"chair_lift"; 2
"aerialway"=>"drag_lift"; 3
"aerialway"=>"gondola"; 4
"aerialway"=>"goods"; 5
"aerialway"=>"mixed_lift"; 6
"aerialway"=>"pylon"; 7
"aerialway"=>"station"; 8
"aeroway"=>"aerodrome"; 9
"aeroway"=>"apron"; 10
...
For some analysis I need to push all these single hstore key-value-pairs into one single hstore -row and I'm not sure how to solve this.
Therefore I first convert all the rows into a single-row text-field:
CREATE TABLE mf_text AS
SELECT array_to_string(array_agg(tags), ',')
FROM mapfeatures_20120813;
In a second step I create a hstore out of this text-field:
SELECT hstore(array_to_string)
FROM mf_text
But the problem is that only 97 of the more than 1000 key-value-pairs are written into the new hstore-field. Also I can't see any pattern in my result, it's totally mixed up:
"atv"=>"no", "hgv"=>"forestry", "lit"=>"no", "psv"=>"private"
, "area"=>"yes", "boat"=>"permissive"
Is there some sort of limitation to an hstore-field on how many key-value-pairs fit into a single hstore? The documentation doesn't say anything.
Aggregating a single hstore value should be as simple as:
SELECT string_agg(tags::text,',')::hstore
FROM mapfeatures_20120813;
As to your question in the title: there is practically no limit to the number of elements.
For your remark:
Also I can't see any pattern in my result, it's totally mixed up:
The manual has this to say:
The order of the pairs is not significant (and may not be reproduced
on output).
I have the following data:
2
3
4
5
6
7
8
9
10
apple
green
hi
I would like to consolidate all of this into one value, like so:
'2','4','5','6','7','8','9','10','apple','green','hi'
So I need to take data from rows, paste them into an Excel file, run this macro and get them all in one cell (with commas and quotes). I will then put them in a WHERE IN clause in an SQL statement for faster searches. If there is an easier way or a tool, please let me know.
Here is the intended use in SQL:
Select *
from Blah..Table
where IDs in
(
'2','4','5','6','7','8','9','10','apple','green','hi'
)
I wrote a user defined function called JoinRange that does that. You can get the code here
http://www.dailydoseofexcel.com/archives/2012/03/31/joinrange-update/
You would use it like
=joinrange(A1:A12,,"','","'","'")
which gives the result
'2','3','4','5','6','7','8','9','10','apple','green','hi'
You can also call it from VBA.
I have a database table of my own that I am trying to construct a query for that seems simple enough, but I feel like I am messing up somewhere because the results are not what they should be.
I basically have a table that is like the following:
Table: Data
Columns:
Row ID Profile Import ID Field ID Product
1 5 Null 5 60 Can
2 0 Null 5 65 Hat
3 0 Null 5 70 Box
4 6 Null 6 60 Fish
I basically want to take the word "Hat" in row 2 and place it into the "Profile" column of row 1, replacing the null value there. I am doing this for multiple rows.
In the case of the multiple rows I want to take the "Profile" column and make it equal to the "Product" column. I only want this to happen in the rows where the "ID" value matches the "Import ID", and where the "Field ID" is 65 specifically. In the example above the "ID" 5 matches the "Import ID" 5, so I want to take the "Product" value "Hat" where the "Field ID" is 65, and place that value into the "Profile" column where the ID is 5. My table has over 9000 rows and 600 would have to be changed in this way, with various ID's needing various products inserted.
The result I would like would be:
Row ID Profile Import ID Field ID Product
1 5 Hat 5 60 Can
2 0 Null 5 65 Hat
3 0 Null 5 70 Box
4 6 Null 6 60 Fish
I pray that makes sense...
My query was this
UPDATE 'Data'
SET 'Profile'='Product'
WHERE 'ID'='Import ID' AND 'Field ID'=65;
I have also tried a subquery
UPDATE 'Data'
SET 'Profile'= (SELECT 'Product' FROM Data WHERE 'Field ID'=65)
WHERE 'ID'='Import ID';
This did not work and I am just wondering if there is some logic I missing. Thank you to anyone who can help, I have been up for a bit trying to understand this...
You need to join the data; something like:
UPDATE d1
SET d1.Profile = d2.Product
FROM [Data] d1 -- dest
INNER JOIN [DATA] d2 -- source
ON d2.[Import ID] = d1.[ID] AND d2.[Field ID] = 65
(note swapped 2 columns...)
A couple thing to keep in mind when learning sql:
it isnt a good idea to have spaces in column names. although they might be easier to read, it makes your queries more difficult. most databases dont allow them at all, and those that do have different ways to specify the columns in queries.
to work around your problem, perhaps you should try to enclose the column name in backticks (`), or in square brackets ([ ]).
in any case, instead of a space, please consider an underscore.
with that in mind you should also remember that not to put column names in quotes. something like
SELECT 'Product' FROM Data WHERE 'Field ID'=65
would not work for two reasons:
a. Selecting quoted text will return that quoted text. so were the where clause to return two rows, you would get the text 'Product' returned twice.
b. here your where clause is comparing the text 'Field ID' with the number 65, which would always be false.
hope that helps