SESSION_ID---STATUS---Desired---
1C1A1111111---Start---Trip1---
1C1A1111111---?---Trip1---
1C1A1111111---?---Trip1---
1C1A1111111---?---Trip1---
1C1A1111111---?---Trip1---
1C1A1111111---Stop---Trip1---
1C1A1111111---?------
1C1A1111111---?------
1C1A1111111---?------
1C1A1111111---?------
1C1A1111111---Start---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---?---Trip2---
1C1A1111111---Stop---Trip2---
CASE -- check if current row is between start and stop
WHEN Last_Value(status IGNORE NULLS)
Over (PARTITION BY session_id
ORDER BY ts
ROWS Unbounded Preceding ) = 'start'
OR status = 'stop'
-- increase trip number whenever status = 'start'
THEN Sum(CASE WHEN status = 'start' THEN 1 END)
Over (PARTITION BY session_id
ORDER BY ts
ROWS Unbounded Preceding)
END
Related
Thanks again for the help everyone. I went with the script below...
SELECT beginning, end,
(SELECT SUM(sale) FROM sales_log WHERE date BETWEEN beginning AND `end` ) AS sales
FROM performance
and I added a salesperson column to both the performance table and sales_log but it winds up crashing DB Browser. What is the issue here? New code below:
SELECT beginning, end, salesperson
(SELECT SUM(sale) FROM sales_log WHERE (date BETWEEN beginning AND end) AND sales_log.salesperson = performance.salesperson ) AS sales
FROM performance
I believe that the following may do what you wish or be the basis for what you wish.
WITH sales_log_cte AS
(
SELECT substr(date,(length(date) -3),4)||'-'||
CASE WHEN length(replace(substr(date,instr(date,'/')+1,2),'/','')) < 2 THEN '0' ELSE '' END
||replace(substr(date,instr(date,'/')+1,2),'/','')||'-'||
CASE WHEN length(substr(date,1,instr(date,'/') -1)) < 2 THEN '0' ELSE '' END||substr(date,1,instr(date,'/') -1) AS date,
CAST(sale AS REAL) AS sale
FROM sales_log
),
performance_cte AS
(
SELECT substr(beginning,(length(beginning) -3),4)||'-'||
CASE WHEN length(replace(substr(beginning,instr(beginning,'/')+1,2),'/','')) < 2 THEN '0' ELSE '' END
||replace(substr(beginning,instr(beginning,'/')+1,2),'/','')||'-'||
CASE WHEN length(substr(beginning,1,instr(beginning,'/') -1)) < 2 THEN '0' ELSE '' END||substr(beginning,1,instr(beginning,'/') -1)
AS beginning,
substr(`end`,(length(`end`) -3),4)||'-'||
CASE WHEN length(replace(substr(`end`,instr(`end`,'/')+1,2),'/','')) < 2 THEN '0' ELSE '' END
||replace(substr(`end`,instr(`end`,'/')+1,2),'/','')||'-'||
CASE WHEN length(substr(`end`,1,instr(`end`,'/') -1)) < 2 THEN '0' ELSE '' END||substr(`end`,1,instr(`end`,'/') -1)
AS `end`
FROM performance
)
SELECT beginning, `end` , (SELECT SUM(sale) FROM sales_log_cte WHERE date BETWEEN beginning AND `end` ) AS sales
FROM performance_cte
;
From your data this results in :-
As can be seen the bulk of the code is converting the dates into a format (i.e. YYYY-MM-DD) that is usable/recognisable by SQLite for the BETWEEN clause.
Date And Time Functions
I don't believe that you want a join between performance (preformance_cte after reformatting the dates) and sales_log (sales_log_cte) as this will be a cartesian product and then sum will sum all the results within the range.
The use of end as a column name is also awkward as it is a KEYWORD requiring it to be enclosed (` grave accents used in the above).
The above works by using 2 CTE's (Common Table Expresssions), which are temporary tables who'd life time is for the query in which they are used.
The first sales_log_cte is simply the sales_log table but with the date reformatted. The second, likewise, is simply the performace table with the dates reformatted.
If the tables already has suitable date formatting then all of the above could simply be :-
SELECT beginning, `end` , (SELECT SUM(sale) FROM sales_log WHERE date BETWEEN beginning AND `end` ) AS sales FROM performance;
I have a table 4 columns - Code, Status, EffectiveDate (EFF_DT), EndDate (END_DT). All the columns are Varchar2 type. EFF_DT and END_DT has ISO format date (YYYY-MM-DD) with NULL values for few rows. Need to get the rows which has END_DT greater than today's date.
While executing the below query, it returns all the Not NULL rows for END_DT. Do not compare the END_DT at all.
select code, status, EFF_DT, END_DT
from (
select CODE, EFF_DT, Status,to_date("END_DT" ,'YYYY-MM-DD' ) as END_DT
from xxx.ZZZ
) TAB
where to_date(TAB.END_DT ,'DD-MM-YY' ) > to_date(CAST(CURRENT_TIMESTAMP as Date), 'DD-MM-YY')
ORDER BY 1 ASC
But the below query compares the END_DT and returns the result properly -
SELECT "TAB"."CODE" , "TAB"."STATUS" AS "STATUS" , "TAB"."EFF_DT" , "TAB"."END_DT"
FROM xxx.ZZZ "TAB"
WHERE ( (to_date("TAB"."END_DT",'YYYY-MM-DD') > to_date(CAST(CURRENT_TIMESTAMP as Date), 'YY-MM-DD')) )
ORDER BY 1 ASC
What is going wrong with the 1st query?
I see difference in return value of END_DT.
For the 1st query, the data is coming like -
while as for the 2nd query, the data is coming like
I have information in an SQLite database. The database structure can not be changed.
I am trying to construct a query that will give me a result in which the TypeOfInformation entries are field names:
My first try was to work with subqueries:
SELECT (SELECT Value FROM FinData WHERE Type = 'Price') AS Price,
(SELECT Value FROM FinData WHERE Type = 'Volume') AS Volume
FROM FinData")
Seemed perfect, however, the result was a resultset in which EVERY entry in the columns Price and Volume are equal to the FIRST respective entry of Price and Volume in the original database:
I tried to get around this and to include the other Price and Volume information - but I failed. (Which is a pity, because the syntax seemed somehow easy to grasp.)
Next try was the following:
Select Date, Value AS Volume From FinData WHERE Volume IN
(SELECT Value FROM FinData WHERE (Type = 'Volume'))
This gives me a resultset with a Volume column and all volume information. Okay, so far. However, when I want to complement this resultset which a Price column via
Select Date, Value AS Volume From FinData WHERE Volume IN
(SELECT Value FROM FinData WHERE (Type = 'Volume'))
union
Select Date, Value AS Close From FinData WHERE Price IN
(SELECT Value FROM FinData WHERE (Type = 'Price'))
I get a resultset that shows Price and Volume information in only ONE column ("Volume"), which therefore is also useless.
To look up a value corresponding to a row in the outer query, you have to use a correlated subquery, which explicitly makes a connection between both:
SELECT Date,
(SELECT Value
FROM FinData
WHERE Date = Dates.Date
AND TypeOfInformation = 'Price'
) AS Price,
(SELECT Value
FROM FinData
WHERE Date = Dates.Date
AND TypeOfInformation = 'Volume'
) AS Volume
FROM (SELECT DISTINCT Date
FROM FinData) AS Dates;
(The DISTINCT subquery is used to prevent multiple rows for each date.)
Alternatively, group all rows for a date, and use aggregation functions and CASE expressions to extract the values from the proper rows:
SELECT Date,
MAX(CASE WHEN TypeOfInformation = 'Price' THEN Value END) AS Price,
MAX(CASE WHEN TypeOfInformation = 'Volume' THEN Value END) AS Volume
FROM FinData
GROUP BY Date;
Assuming dates are unique per price volume pair, you can do this:
with xxx(date,price,volume) as
(
select date,value,0 from findata where typeofinformation = 'Price'
union
select date,0,value from findata where typeofinformation = 'Volume'
)
select date,sum(price) price,sum(volume) volume from xxx group by date;
How to take first value and last value of a column with group by on a particuar column?
For eg:i need first_value and last_value of case_owner column based on group by og case id.
For first value:
select case_owner as case_owner_first_value
from
table
qualify row_number() over (partition by case_id order by case_id) = 1
For last value:
select case_owner as case_owner_last_value
from
table
qualify row_number() over (partition by case_id order by case_id desc ) = 1
Please note, while combining the FIRST_VALUE with ORDER BY clause, you may need to add rows between.
Example:
CREATE VOLATILE TABLE test_fv (id INTEGER,seq SMALLINT) ON COMMIT PRESERVE ROWS;
INSERT INTO test_fv VALUES (NULL,1);
INSERT INTO test_fv VALUES (2,2);
INSERT INTO test_fv VALUES (3,3);
INSERT INTO test_fv VALUES (4,4);
INSERT INTO test_fv VALUES (5,5);
SELECT seq, FIRST_VALUE(id ignore NULLS) OVER (ORDER BY seq ASC ROWS BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING) FROM test_fv;
This wont work:
SELECT seq, FIRST_VALUE(id ignore NULLS) OVER (ORDER BY seq ASC) FROM test_fv;
I have:
PROCEDURE A
(
inId IN NUMBER,
RC1 OUT SYS_REFCURSOR
) IS
tMessage VARCHAR2(128);
BEGIN
OPEN RC1 FOR
SELECT * FROM
(
SELECT
a.company,
SUM(a.holding_balance) balance
FROM TableNameEntries A
WHERE
A.BATCH_ID = inId
GROUP BY a.company
)
ORDER BY balance DESC ;
EXCEPTION
WHEN OTHERS THEN
tMessage :='Exception ' || SQLCODE || ': ' || SQLERRM;
OPEN RC1 FOR
SELECT tMessage FROM DUAL;
END A;
For the balance column, I have values like -1, 0,1. Currently it's sorted like 1 0 -1, but I don't care about the zeros, so I want it to be like -1,1,0 or 1,-1,0
How do I do it in PL/SQL? I tried:
SELECT
a.company,
SUM(a.holding_balance) balance
FROM REC.CAG_GL_ENTRIES A
WHERE
A.BATCH_ID = 201311
order by case priority when 0 then 2 else 1 END priority
But it's saying PRIORITY is invalid identifier.
How can I get this to work?
Try:
ORDER BY CASE balance
WHEN 0 THEN null
ELSE balance
END
DESC NULLS LAST
there are two ways in your case (second is more common, first is more clear):
SELECT a.company,
SUM(a.holding_balance) balance
FROM REC.CAG_GL_ENTRIES A
WHERE A.BATCH_ID = 201311
order by abs(balance) desc;
SELECT a.company,
SUM(a.holding_balance) balance
FROM REC.CAG_GL_ENTRIES A
WHERE A.BATCH_ID = 201311
order by decode(balance,1,1,-1,1,2);
ORDER BY SIGN(ABS(balance)) DESC, balance
ABS() turns all the negatives to positives. SIGN() turns 0 to 0, >0 to 1 (and <0 to -1). Combined with DESC this puts all the zeros at the end and all the non-zeros above them in no particular order.
Then I sorted by the balance again to order the non-zeros.
You can also use
order by balance * balance desc