I want to make a select NAM, COUNT(*) as cnt on a table, but I want the count to function in case sensitive matter.
For example, if the NAM attribute has the following 2 values:
DEV
dev
I would like cnt for each value to be 1 (to have 2 rows in result), and not cnt=2 (to have one row in result).
How can I do this in Teradata?
You need to specify CASESPECIFIC on your grouped column:
select
NAM (CASESPECIFIC),
count (*)
from
<your table>
group by 1
Here's some good info on this topic.
Related
I have two tables: one with record of a person with initial number, and a second one with records of changes to this number.
During a join, I do coalesce(latest_of_series, initial) to get a singular number per person. So good so far.
I also group this numbers into a groups, on order these groups separately. I know I can do:
select
coalesce(latest, initial) as final,
case
when coalesce(latest, inital) > 1 and coalesce(latest, inital) < 100 then 'group 1'
-- other cases
end as group
-- rest of the query
but that's of course horribly unreadable.
I tried:
select
coalesce(latest_of_series, initial_if_no_series) as value,
case
when value > 1 and value < 100 then 'group 1'
-- rest of the cases
end as group
-- rest of the query
but then the sqlite complains that there's no column "value"
Is there really no way of using previous result of coalesce as a "variable"?
That's not an SQLite limitation. That's an SQL limitation.
All the column names are decided as one. You can't define a column in line 2 of your query and then refer to it in line 3 of your query. All columns derive from the tables you select, each on their own, they can't "see" each other.
But you can use nested queries.
select
value,
case
when value >= 1 and value < 100 then 'group 1'
when value >= 100 and value < 200 then 'group 2'
else 'group 3'
end value_group
from
(
select
coalesce(latest_of_series, initial_if_no_series) as value
from
my_table
group by
user_id
) v
This way, the columns of the inner query can be decided as one, and the columns of the outer query can be decided as one. It might ever be faster, depending on the circumnstances.
I think this is a pretty simple question but I can't figure out the right search terms to search this. This question is the most similar I could find, but it's the opposite of what I'm trying to do.
I have a query like this :
SELECT * FROM table WHERE column LIKE "val1%" OR column LIKE "val2%" OR column LIKE "val3%", ...so..on..and..on
Since it's an OR, only some of them will give matches from the column.
How can I return the matching LIKE clause with the query itself ? Like this :
SELECT *, (val1 or val2 or val3 - the matched val) FROM table WHERE column LIKE "val1%" OR column LIKE "val2%" OR column LIKE "val3%", ...so..on..and..on
Since the matching is by wildcard "%", I need to get the exact value that got the match.
If the table is this :
name
age
Mike
1
John
2
Michael
3
Milinda
4
And if the query is :
SELECT *, (the matched value) FROM table WHERE name LIKE "Mik%" OR name LIKE "Mic%" OR name LIKE "mia%"
It would return :
name
age
match
Mike
1
Mik
Michael
3
Mic
Is this possible purely with an SQLite query ? I know this can be done later after obtaining the results, but want to remove that redundancy since SQLite will already be matching anyway.
Note: The table is very large. 100,000+ rows. So performance is a big factor to get result as fast as possible. Also the OR conditions can be 5 or 10 or 15+
Create a CTE with all the match strings that you have and join to the table:
WITH cte(match) AS (VALUES ('Mik'), ('Mic'))
SELECT t.*, c.match
FROM tablename t INNER JOIN cte c
ON t.name LIKE c.match || '%'
See the demo.
You may use a case expresssion. See working fiddle below:
Schema (SQLite v3.30)
CREATE TABLE my_table (
`name` VARCHAR(7),
`age` INTEGER
);
INSERT INTO my_table
(`name`, `age`)
VALUES
('Mike', '1'),
('John', '2'),
('Michael', '3'),
('Milinda', '4');
Query #1
SELECT
*,
CASE
WHEN name LIKE "Mik%" THEN "Mik"
WHEN name LIKE "Mic%" THEN "Mic"
WHEN name LIKE "mia%" THEN "mia"
END as matched_value
FROM
my_table
WHERE
name LIKE "Mik%" OR
name LIKE "Mic%" OR
name LIKE "mia%";
name
age
matched_value
Mike
1
Mik
Michael
3
Mic
View on DB Fiddle
I'm trying to write a query that in Teradata but I'm not sure how to do it; my table looks like this:
col1: text (account_number)
col2: text (secondary account number)
col3: text (Primary_cust)
the business requirements are:
"Group records by account number.
If there is only one record for an account then keep that record.
If there are multiple records for an account number then:
(1) if only one record has Primary_CUST = 'Y' then keep.
(2) if multiple records have Primary_CUST = 'Y' then keep one with lowest SCDRY_ACCT_NBR
(3) If no records have Primary_CUST = 'Y' then keep one with lowest SCDRY_ACCT_NBR.
I know I need a CASE statement and I'm able to write the first requirement, but not sure on the second. Any help would be greatly appreciated.
You just have to think about how to order the rows to get the row you want on top, seems to be like this:
SELECT * FROM tab
QUALIFY
Row_Number()
Over (PARTITION BY account_number -- for each account
ORDER BY Primary_CUST DESC -- 'Y' before 'N' (assuming it's a Y/N column)
,SCDRY_ACCT_NBR -- lowest number
) = 1 -- return the top row
Of course QUALIFY is proprietary Teradata syntax, if you need to do this on Oracle you have to wrap it in a Derived Table:
SELECT *
FROM
(
SELECT t.*,
Row_Number()
Over (PARTITION BY account_number -- for each account
ORDER BY Primary_CUST DESC -- 'Y' before 'N' (assuming it's a Y/N column)
,SCDRY_ACCT_NBR) AS rn-- lowest number
FROM tab
) AS dt
WHERE rn = 1 -- return the top row
I'm making a report in Cognos Report Studio and I'm having abit of trouble getting a count taht I need. What I need to do is count the number of IDs for a department. But I need to split the count between initiated and completed. If an ID occures more than once, it is to be counted as completed. The others, of course, will be initiated. So I'm trying to count the number of ID occurences for a distinct ID. Here is the query I've made in SQl Developer:
SELECT
COUNT((CASE WHEN COUNT(S.RFP_ID) > 8 THEN MAX(CT.GCT_STATUS_HISTORY_CLOSE_DT) END)) AS "Sales Admin Completed"
,COUNT((CASE WHEN COUNT(S.RFP_ID) = 8 THEN MIN(CT.GCT_STATUS_HISTORY_OPEN_DT) END)) as "Sales Admin Initiated"
FROM
ADM.B_RFP_WC_COVERAGE_DIM S
JOIN ADM.B_GROUP_CHANGE_REQUEST_DIM CR
ON S. RFP_ID = CR.GCR_RFP_ID
JOIN ADM.GROUP_CHANGE_TASK_FACT CT
ON CR.GROUP_CHANGE_REQUEST_KEY = CT.GROUP_CHANGE_REQUEST_KEY
JOIN ADM.B_DEPARTMENT_DIM D
ON D.DEPARTMENT_KEY = CT.DEPARTMENT_RESP_KEY
WHERE CR.GCR_CHANGE_TYPE_ID = '20'
AND S.RFP_LOB_IND = 'WC'
AND S.RFP_AUDIT_IND = 'N'
AND CR.GCR_RECEIVED_DT BETWEEN '01-JAN-13' AND '31-DEC-13'
AND D.DEPARTMENT_DESC = 'Sales'
AND CT.GCT_STATUS_IND = 'C'
GROUP BY S.RFP_ID ;
Now this works. But I'm not sure how to translate taht into Cognos. I tried doing a CASE taht looked liek this(this code is using basic names such as dept instead of D.DEPARTMENT_DESC):
CASE WHEN dept = 'Sales' AND count(ID for {DISTINCT ID}) > 1 THEN count(distinct ID)END)
I'm using count(distinct ID) instead of count(maximum(close_date)). But the results would be the same anyway. The "AND" is where I think its being lost. It obviously isn't the proper way to count occurences. But I'm hoping I'm close. Is there a way to do this with a CASE? Or at all?
--EDIT--
To make my question more clear, here is an example:
Say I have this data in my table
ID
---
1
2
3
4
2
5
5
6
2
My desired count output would be:
Initiated Completed
--------- ---------
4 2
This is because two of the distinct IDs (2 and 5) occure more than once. So they are counted as Completed. The ones that occure only once are counted as Initiated. I am able to do this in SQl Dev, but I can't figure out how to do this in Cognos Report Studio. I hope this helps to better explaine my issue.
Oh, I didn't quite got it originally, amending the answer.
But it's still easiest to do with 2 queries in Report Studio. Key moment is that you can use a query as a source for another query, guaranteeing proper group by's and calculations.
So if you have ID list in the table in Report Studio you create:
Query 1 with dataitems:
ID,
count(*) or count (1) as count_occurences
status (initiated or completed) with a formula: if (count_occurences > 1) then ('completed') else ('initiated').
After that you create a query 2 using query one as source with just 2 data items:
[Query1].[Status]
Count with formula: count([Query1].[ID])
That will give you the result you're after.
Here's a link to doco on how to nest queries:
http://pic.dhe.ibm.com/infocenter/cx/v10r1m0/topic/com.ibm.swg.ba.cognos.ug_cr_rptstd.10.1.0.doc/c_cr_rptstd_wrkdat_working_with_queries_rel.html?path=3_3_10_6#cr_rptstd_wrkdat_working_with_queries_rel
I would like to know how to make a single query to select something from one table or from another. For example I have Table A with the aID=2 and Table B with bID=3. So how to make the query to return the id from table A or table B for a given id = 3?
Thanks in advance
If you do not know which table to use before you're running the query, you can combine multiple queries with UNION, provided that you're selecting the same number of columns:
SELECT something FROM A WHERE aID = 3
UNION ALL
SELECT something FROM B WHERE bID = 3
If you do not want to duplicate the WHERE condition, you can use a nested query and apply the WHERE to its result:
SELECT something
FROM (SELECT aID as ID, something FROM A
UNION ALL
SELECT bID , something FROM B)
WHERE ID = 3