I have a single table of activities, some labelled 'Assessment' (type_id of 50) and some 'Counselling' (type_id of 9) with dates of the activities. I need to compare these dates to find how long people wait for counselling after assessment. The table contains rows for many people, and that is the primary key of 'id'. My problem is how to produce a result row with both the assessment details and the counselling details for the same person, so that I can compare the dates. I've tried joining the table to itself, and tried nested subqueries, I just can't fathom it. I'm using Access 2010 btw.
Please forgive my stupidity, but here's an example of joining the table to itself that doesn't work, producing nothing (not surprising):
Table looks like:
ID TYPE_ID ACTIVITY_DATE_TIME
----------------------------------
1 9 20130411
1 v 50 v 20130511
2 9 20130511
3 9 20130511
In the above the last two rows have only had assessment so I want to ignore them, and just work on the situation where there's both assessment and counselling 'type-id'
SELECT
civicrm_activity.id, civicrm_activity.type_id,
civicrm_activity.activity_date_time,
civicrm_activity_1.type_id,
civicrm_activity_1.activity_date_time
FROM
civicrm_activity INNER JOIN civicrm_activity AS civicrm_activity_1
ON civicrm_activity.id = civicrm_activity_1.id
WHERE
civicrm_activity.type_id=9
AND civicrm_activity_1.type_id=50;
I'm actually wondering whether this is in fact not possible to do with SQL? I hope it is possible? Thank you for your patience!
Sounds to me like you only want to get the ID numbers where you have a TYPE_ID entry of both 9 and 50.
SELECT DISTINCT id FROM civicrm_activity WHERE type_id = '9' AND id IN (SELECT id FROM civicrm_activity WHERE type_id = '50');
This will give you a list of id's that has entries with both type_id 9 and 50. With that list you can now go and get the specifics.
Use this SQL for the time of type_id 9
SELECT activity_date_time FROM civicrm_activity WHERE id = 'id_from_last_sql' AND type_id = '9'
Use this SQL for the time of type_id 50
SELECT activity_date_time FROM civicrm_activity WHERE id = 'id_from_last_sql' AND type_id = '50'
Your query looks OK to me, too. The one problem might be that you use only one table alias. I don't know, but perhaps Access treats the table name "specially" such that, in effect, the WHERE clause says
WHERE
civicrm_activity.type_id=9
AND civicrm_activity.type_id=50;
That would certainly explain zero rows returned!
To fix that, use an alias for each table. I suggest shorter ones,
SELECT A.id, A.type_id, A.activity_date_time,
B.type_id, B.activity_date_time
FROM civicrm_activity as A
JOIN civicrm_activity as B
ON A.id = B.id
WHERE A.type_id=9
AND B.type_id=50;
Related
Problem
I have a situation in which I have two tables in which I would like the entries from table 2 (lets call it table_2) to be matched up with the entries in table 1 (table_1) such that there are no duplicates rows of table_2 used in the match up.
Discussion
Specifically, in this case there are datetime stamps in each table (field is utcdatetime). For each row in table_1, I want to find the row in table_2 in which has the closed utcdatetime to the table 1 utcdatetime such that the table2.utcdatetime is older than the table_1 utcdatetime and within 30 minutes of the table 1 utcdatetime. Here is the catch, I do not want any repeats. If a row in table 2 gets gobbled up in a match on an earlier row in table 1, then I do not want it considered for a match later.
This has currently been implemented in a Python routine, but it is slow to iterate over all of the rows in table 1 as it is large. I thought I was there with a single SQL statement, but I found that my current SQL results in duplicate table 2 rows in the output data.
I would recommend using a nested select to get whatever results you're looking for.
For instance:
select *
from person p
where p.name_first = 'SCCJS'
and not exists (select 'x' from person p2 where p2.person_id != p.person_id
and p.name_first = 'SCCJS' and p.name_last = 'SC')
I am trying to create a table that has columns called user_id and top5_foods (binary column). I currently have two tables, one has all of the user_ids and the foods associated with those user_ids and one table that only contains the top5 foods according to a type of calculation to select the top5 foods.
The table that I am trying to create if to have the column of the user_id and if at least one of their favorite foods is in the top_5_food table, put the value of the top5_foods as 1 and if not, 0.
Something like the following:
user_id top5_foods
----------------------
34223 1
43225 0
34323 1
I have tried to use the CASE command but it just duplicated the user_ids and mark 1 or 0 whenever it finds a food that is in the top_5_foods table. But I don't want it to duplicate. Could you please help ?
Thank you very much
If I understand correctly, a left join and aggregation:
select uf.user_id,
(count(t.food_id) > 0) as top5_foods
from user_foods uf left join
top5_foods t
on uf.food_id = t.food_id
group by uf.user_id;
I have a large database and i'd like to pull info from a table (Term) where the Names are not linked to a PartyId for a certain SearchId. However:
There are multiple versions of the searches (sometimes 20-40 - otherwise I think SQL - Comparing two rows and two columns would work for me)
The PartyId will almost always be NULL for the first version for the search, and if the same Name for the same SearchId has a PartyId associated in a later version the NULL row should not appear in the results of the query.
I have 8 left joins to display the information requested - 3 of them are joined on the Term table
A very simplified sample of data is below
CASE statement? Join the table with itself for comparison? A temp table or do I just return the fields I'm joining on and/or want to display?
Providing sample data that yields no expected result is not as useful as providing data that gives an expected result..
When asking a question start with defining the problem in plain English. If you can't you don't understand your problem well enough yet. Then define the tables which are involved in the problem (including the columns) and sample data; the SQL you've tried, and what you're expected result is using the data in your sample. Without this minimum information we make many guesses and even with that information we may have to make assumptions; but without a minimum verifiable example showing illustrating your question, helping is problematic.
--End soap box
I'm guessing you're after only the names for a searchID which has a NULL partyID for the highest SearchVerID
So if we eliminated ID 6 from your example data, then 'Bob' would be returned
If we added ID 9 to your sample data for name 'Harry' with a searchID of 2 and a searchVerID of 3 and a null partyID then 'Harry' too would be returned...
If my understanding is correct, then perhaps...
WITH CTE AS (
SELECT Name, Row_Number() over (partition by Name order by SearchVersID Desc)
FROM Term
WHERE SearchID = 2)
SELECT Name
FROM CTE
WHERE RN = 1
and partyID is null;
This assigns a row number (RN) to each name starting at 1 and increasing by one for each entry; for searchID's of 2. The highest searchversion will always have a RN of 1. Then we filter to include only those RN which are 1 and have a null partyID. This would result in only those names having a searchID of 2 the highest search version and a NULL partyID
Ok So I took the question a different way too..
If you simply want all the names not linked to a PartyID for a given search.
SELECT A.*
FROM TERM A
WHERE NOT EXISTS (SELECT 1
FROM TERM B
WHERE A.Name = B.Name
AND SearchID = 2) and partyID is not null)
AND searchID = 2
The above should return all term records associated to searchID 2
that have a partyId. This last method is the exists not exists and set logic I was talking about in comments.
Okay, I probably could have come up with a better title, but wasn't sure how to word it so let me explain.
Say I have a table with the column 'CODE'. Each record in my table will have either 'A', 'B', or 'C' as it's value in the 'CODE' column. What I would like is to get a count of how many 'A's, 'B's, and 'C's I have.
I know I could accomplish this with 3 different queries, but I'm wondering if there is a way to do it with just 1.
Use:
SELECT t.code,
COUNT(*) AS numInstances
FROM YOUR_TABLE t
GROUP BY t.code
The output will resemble:
code numInstances
--------------------
A 3
B 5
C 1
If a code exists that has not been used, it will not show up. You'd need to LEFT JOIN to the table containing the list of codes in order to see those that don't have any references.
I have a table with three columns
fk_id,
sort_column,
value_column
for each fk__id_ I'd like to retrieve the first 5 records order by the sort_column
I've tried this for several hours now and I don't have the slightest idea on how to do it
I'm using MySQL
I'd be grateful for any help
Marc
EDIT:
I should probably clarify the output format I'm looking for:
I want two columns, fk id and value_column
fk id would just be repeated 5 times for each value
the reason I wanna do this is because later on I need to do some calculations on this results set such as calculating the average and the sum for each fk_id
Use this code and then add AND row_number < 5
I don't think this can be done.
You would probably have to use a scripting language to do this individually for each fk_id
I could be wrong
This will do what you're looking for.
SELECT t1.fk_id, t1.value_column
FROM table AS t1
LEFT JOIN table AS t2
ON t1.fk_id=t2.fk_id AND t1.sort_column < t2.sort_column
WHERE t2.fk_id IS NULL
ORDER BY t1.sort_column DESC
LIMIT 5