How to change a value rank in a column MS SQL - sql

I've a table with a column which is defining a rank value for display position:
Unid | Rank | Name
10 | 1 | A
20 | 2 | B
30 | 3 | C
40 | 4 | D
50 | 5 | E
How to update the table for have Name E on the top of the list and followed by the A, B , C , D names ?


One possible solution is to use ROW_NUMBER() with appropriate ORDER BY clause:
Table:
CREATE TABLE Data (
[Unid] int,
[Rank] int,
[Name] varchar(1)
)
INSERT INTO Data ([Unid], [Rank], [Name])
VALUES
(10, 1, 'A'),
(20, 2, 'B'),
(30, 3, 'C'),
(40, 4, 'D'),
(50, 5, 'E')
Statement:
UPDATE d
SET d.[Rank] = d.[NewRank]
FROM (
SELECT
[Rank],
ROW_NUMBER() OVER (ORDER BY CASE WHEN [Name] = 'E' THEN 0 ELSE 1 END, [Name]) AS [NewRank]
FROM Data
) d
Result:
Unid Rank Name
10 2 A
20 3 B
30 4 C
40 5 D
50 1 E

Related

Join on existing aggregate query to pivot result without id

On a Sql-Server instance, I have three tables:
ActionItem
Id
Name
1
Fish
2
Gravy
3
Pants
ActionData
Id
ActionId
Group
Field
Value
1
1
1
1
100
2
1
1
2
200
3
1
1
3
300
4
1
1
4
NULL
5
1
1
5
NULL
6
1
2
6
"Some Text"
7
2
1
1
50
8
2
1
2
60
9
2
1
3
70
Costing
Id
ActionId
Break
Cost
1
1
Normal
11.3
2
1
Sub
54
3
1
Premium
0.4
4
3
Normal
22
5
3
Premium
0.67
I have a query that sums the cost for each ActionItem:
select
ai.Id,
ai.Name,
sum(c.Cost)
from ActionItem ai
left join Costing c on ai.Id = c.ActionId
group by
ai.Id,
ai.Name
Nice and straight-forward:
Id
Name
(No column name)
1
Fish
65.7
2
Gravy
NULL
3
Pants
22.67
I created a pivot too:
select * from
(select [ActionId], [Group], [Field], [Value] from ActionData) src
pivot (max([Value]) for [ActionId] in ([1],[2],[3],[4])) ppp
Which gets me data in the right format:
Group
Field
1
2
3
4
1
1
100
50
NULL
NULL
1
2
200
60
NULL
NULL
1
3
300
70
NULL
NULL
1
4
NULL
NULL
NULL
NULL
1
5
NULL
NULL
NULL
NULL
2
6
"Some Text"
NULL
NULL
NULL
But I cannot join these two queries together because that PIVOT doesn't contain the ActionId ... even though I use Select * from - how can I get the ActionId col to show on my pivoted data, so I can join it to the rest of my original query?
I could not get sqlfiddle.com to work for MS SQL SERVER today but here are create and inserts if anyone's interested:
CREATE TABLE ActionItem
([Id] int, [Name] varchar(5));
INSERT INTO ActionItem
([Id], [Name])
VALUES
(1, 'Fish'),
(2, 'Gravy'),
(3, 'Pants');
CREATE TABLE ActionData
([Id] int, [ActionId] int, [Group] int, [Field] int, [Value] varchar(11));
INSERT INTO ActionData
([Id], [ActionId], [Group], [Field], [Value])
VALUES
(1, 1, 1, 1, '100'),
(2, 1, 1, 2, '200'),
(3, 1, 1, 3, '300'),
(4, 1, 1, 4, NULL),
(5, 1, 1, 5, NULL),
(6, 1, 2, 6, '"Some Text"'),
(7, 2, 1, 1, '50'),
(8, 2, 1, 2, '60'),
(9, 2, 1, 3, '70')
;
CREATE TABLE Costing (
[Id] int,
[ActionId] int,
[Break] VARCHAR(9),
[Cost] FLOAT);
INSERT INTO Costing
([Id], [ActionId], [Break], [Cost])
VALUES
('1', '1', 'Normal', '11.3'),
('2', '1', 'Sub', '54'),
('3', '1', 'Premium', '0.4'),
('4', '3', 'Normal', '22'),
('5', '3', 'Premium', '0.67');

Not sure what output you expect.
But here's an attempt to join the two queries in 1 pivot.
select pvt.*
from
(
select d.ActionId, ai.Name
--, d.[Group]
, cast(d.[Field] as varchar(30)) as [Col]
, try_cast(d.[Value] as float) as [Value]
from ActionData d
left join ActionItem ai on ai.Id = d.ActionId
where isnumeric(d.[Value]) = 1
union all
select c.ActionId, ai.Name
--, 1 as [Group]
, c.[Break] as [Col]
, sum(c.Cost) as TotalCost
from Costing c
left join ActionItem ai
on ai.Id = c.ActionId
group by c.ActionId, ai.Name, c.[Break]
) src
pivot (
max([Value])
for [Col] in ([1],[2],[3],[4],[Normal],[Premium],[Sub])
) pvt
GO
ActionId | Name | 1 | 2 | 3 | 4 | Normal | Premium | Sub
-------: | :---- | ---: | ---: | ---: | ---: | -----: | ------: | ---:
1 | Fish | 100 | 200 | 300 | null | 11.3 | 0.4 | 54
2 | Gravy | 50 | 60 | 70 | null | null | null | null
3 | Pants | null | null | null | null | 22 | 0.67 | null
db<>fiddle here

Remove duplicate value in different categories in same table SQL but keep the first category value

Let's say I have a table with id and category like the table below
D_id | D_category
-----------------
1 | A
2 | A
3 | A
1 | B
2 | B
4 | B
5 | B
1 | C
2 | C
4 | C
5 | C
6 | C
Hence the rules are like this
values in category A should not be appear in category B and category C
values in category B should not be appear in category C
The end result should be like this
D_id | D_category
-----------------
1 | A
2 | A
3 | A
4 | B
5 | B
6 | C
I will provide a solution that works but its not an ideal solution can anyone help me to provide a better solution in case there are more categories meaning that if there are more category then it should follow the rules the values in previous categories should not appear in any other categories
DECLARE #A TABLE(
D_id INT NOT NULL,
D_category VARCHAR(MAX));
INSERT INTO #A(D_id,D_category)
VALUES (1, 'A'),
(2, 'A'),
(3, 'A'),
(1, 'B'),
(2, 'B'),
(4, 'B'),
(5, 'B'),
(1, 'C'),
(2, 'C'),
(4, 'C'),
(5, 'C'),
(6, 'C')
DELETE t
FROM #A t
WHERE t.D_category = 'B' AND EXISTS (SELECT 1 FROM #A t2 WHERE t2.D_category = 'A' and t.D_id = t2.D_id)
DELETE t
FROM #A t
WHERE t.D_category = 'C' AND EXISTS (SELECT 1 FROM #A t2 WHERE t2.D_category = 'B' and t.D_id = t2.D_id)
DELETE t
FROM #A t
WHERE t.D_category = 'C' AND EXISTS (SELECT 1 FROM #A t2 WHERE t2.D_category = 'A' and t.D_id = t2.D_id)
select * from #A

Just check that the specified record doesn't exist earlier in the sequence.
select *
from #A A1
where not exists (
select 1
from #A A2
where A2.D_id = A1.D_id
and A2.D_category < A1.D_category
)

or just make use of row_number()
select *
from
(
select *, r = row_number() over (partition by D_id order by D_category)
from #A
) a
where a.r = 1

Delete using the join syntax:
delete a
from my_table a
join my_table b on a.D_id = b.D_id
and a.D_category > b.D_category
See live demo.

SQL select parent-child recursively based on a reference table

I saw many questions related to a recursive query but couldn't find any that shows how to use it based on a reference table.
I have a MasterTable where Id, ParentId columns are establishing the parent/child relation.
I have a SubTable where I have a bunch of Ids which could be a parent Id or child Id.
I would like to retrieve all related records (parent or child, recursively) from the MasterTable based on given SubTable
Current output:
id parentId
----------- -----------
1 NULL
2 1
3 1
4 NULL
5 4
6 5
7 6
Expected output
id parentId
----------- -----------
1 NULL
2 1
3 1
4 NULL
5 4
6 5
7 6
8 9
9 NULL
10 NULL
11 10
13 11
14 10
15 16
16 NULL
Comparison of actual vs expected:
Code:
DECLARE #MasterTable TABLE
(
id INT NOT NULL,
parentId INT NULL
);
DECLARE #SubTable TABLE
(
id INT NOT NULL
);
INSERT INTO #MasterTable (id, parentId)
VALUES (1, NULL), (2, 1), (3, 1), (4, NULL), (5, 4), (6, 5),
(7, 6), (8, 9), (9, NULL), (10, NULL), (11, 10), (12, NULL),
(13, 11), (13, 11), (14, 10), (15, 16), (16, NULL);
INSERT INTO #SubTable (id)
VALUES (1), (2), (3), (4), (6), (5), (7),
(8), -- it does not show
(13), -- it does not show
(15); -- it does not show
/* beside 8,13,15 it should add 9,11,14 and 10,16 */
;WITH cte AS
(
SELECT
mt1.id,
mt1.parentId
FROM
#MasterTable AS mt1
WHERE
mt1.parentId IS NULL
AND EXISTS (SELECT NULL AS empty
FROM #SubTable AS st
WHERE st.Id = mt1.id)
UNION ALL
SELECT
mt2.id,
mt2.parentId
FROM
#MasterTable AS mt2
INNER JOIN
cte AS c1 ON c1.id = mt2.parentId
)
SELECT DISTINCT
c2.id,
c2.parentId
FROM
cte AS c2
ORDER BY
id;

Is the following query suitable for the issue in question?
with
r as(
select
m.*, iif(m.parentid is null, 1, 0) p_flag
from #MasterTable m
join #SubTable s
on s.id = m.id
union all
select
m.*, iif(m.parentid is null, 1, r.p_flag)
from r
join #MasterTable m
on (r.p_flag = 1 and m.parentid = r.id) or
(r.p_flag = 0 and r.parentid = m.id)
)
select distinct
id, parentid
from r
order by id;
Output:
| id | parentid |
+----+----------+
| 1 | NULL |
| 2 | 1 |
| 3 | 1 |
| 4 | NULL |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 9 |
| 9 | NULL |
| 10 | NULL |
| 11 | 10 |
| 13 | 11 |
| 14 | 10 |
| 15 | 16 |
| 16 | NULL |
Test it online with rextester.com.

;WITH cte
AS (
SELECT mt1.id,
mt1.parentId
FROM #MasterTable AS mt1
WHERE mt1.parentId IS NULL
UNION ALL
SELECT mt2.id,
mt2.parentId
FROM #MasterTable AS mt2
INNER JOIN cte AS c1
ON c1.id = mt2.parentId
)
SELECT DISTINCT c2.id,
c2.parentId
FROM cte AS c2
where
EXISTS (
SELECT 1 AS empty FROM #SubTable AS st
WHERE ( st.Id = c2.id or st.Id = c2.parentId)
)
or
EXISTS (
SELECT 1 AS empty FROM #MasterTable AS mt
WHERE ( c2.Id = mt.parentId or c2.parentId = mt.parentId)
)
ORDER BY id;

You may try this....
; with cte as(
select distinct mas.id, mas.parentId, iif(mas.parentid is null, 1, 0) PId
from #MasterTable mas inner join #SubTable sub
on sub.id in(mas.id, mas.parentid) ----- create top node having parentid is null
union all
select mas.id, mas.parentId, ct.PId
from cte ct inner join #MasterTable mas
on (ct.PId = 1 and mas.parentid = ct.id) or
(ct.PId = 0 and ct.parentid = mas.id) ----- create child node for correspoding parentid created above
)
select distinct id, parentid from cte order by id
option (MAXRECURSION 100); ---- Add Maxrecursion to prevent the infinite loop
You can find this link for more info on recursive query in SQL link. In this link see Example E or above.

Distribute values to several rows in SQL Server

I need help with SQL Server on how to distribute a row value to several rows with the same id. To illustrate,
Id = ProductInventoryCode
Qty = QuantityInStock
ForDistribution:
Id | Qty | TotalNoOfBranchesWithId
---+--------+-------------------------
1 | 40 | 2
2 | 33 | 3
3 | 21 | 2
A table that will receive the distributed values
Id | BranchCode | Qty | QtyFromForDistributionTable
-------------------------------------------------------
1 101 13 20
1 102 8 20
2 101 10 11
2 102 2 10
2 103 3 12
3 101 1 11
3 102 12 10
As much as possible the distribution should be near equal for each id and branches.
I got something like below, but somewhat got confused and lost path.
with rs as
(
select
r.*, cume.cumequantity,
coalesce(s.shipped, 0) AS shipped
from
tmpForDistribution r
cross apply
(SELECT SUM([QuantityInStock]) AS cumequantity
FROM tmpForDistribution r2
WHERE r2.ProductInventoryCode = r.ProductInventoryCode) cume
left join
(SELECT ProductInventoryCode, COUNT(ProductInventoryCode) AS shipped
FROM tmpDistributed s
GROUP BY s.ProductInventoryCode) s ON r.ProductInventoryCode = s.ProductInventoryCode
)
select
rs.ProductInventoryCode, rs.cumequantity, rs.QuantityInStock,
***"how to distribute"***
from rs
I'm currently using SQL Server 2008
Here's a sample screen output
The upper result is 145 Branches, below we use to distribute the ForDistributionQty field which is 3130, I am ending up with a fraction (DistVal = 21.586) which is not correct for this problem, it should be a whole number such as 21, however, if its just 21, then 21 x 145 is just 3045 which is shy of 85 units.

Here we distribute the values, and then make a final "adjustment" to the record which has the largest quantity (arbitrary). But at the end of the day, the math works and the distributed values are square.
Note: Not sure why in your sample why ID 2 did not get an even distribution
Declare #Table table (Id int,BranchCode int,Qty int)
Insert Into #Table values
(1, 101, 13),
(1, 102, 8),
(2, 101, 10),
(2, 102, 2),
(2, 103, 3),
(3, 101, 1),
(3, 102, 12)
Declare #Dist table (ID int,Qty int)
Insert Into #Dist values
(1,40),
(2,33),
(3,49)
;with cte0 as (
Select A.*
,ToDist = cast(D.Qty as int)
,DistVal = cast(D.Qty as int)/C.Cnt
,RN = Row_Number() over (Partition By A.ID Order By cast(D.Qty as int)/C.Cnt Desc,A.Qty Desc)
From #Table A
Join (Select ID,Cnt=count(*) from #Table Group By ID) C on A.ID=C.ID
Join #Dist D on A.ID=D.ID )
, cte1 as (
Select ID,AdjVal=Sum(DistVal)-max(ToDist) From cte0 Group By ID
)
Select A.ID
,A.BranchCode
,A.Qty
,DistVal = DistVal - case when A.RN<=abs(AdjVal) then 1*sign(AdjVal) else 0 end
From cte0 A
Join cte1 B on (A.ID=B.Id)
Order By 1,2
Returns
ID BranchCode Qty DistVal
1 101 13 20
1 102 8 20
2 101 10 11
2 102 2 11
2 103 3 11
3 101 1 24
3 102 12 25

If you can tolerate decimal values, a subquery seems to give a better query plan (tested on SQL 2014, with some sensible keys in place, this avoids a table spool and some additional index scans):
Declare #Table table (Id int,BranchCode int,Qty int, primary key(id, branchcode))
Insert Into #Table values
(1, 101, 13),
(1, 102, 8),
(2, 101, 10),
(2, 102, 2),
(2, 103, 3),
(3, 101, 1),
(3, 102, 12)
Declare #Dist table (ID int primary key,Qty int)
Insert Into #Dist values
(1,40),
(2,33),
(3,21)
SELECT
t.id
,t.BranchCode
,t.Qty
,(d.Qty / CAST((SELECT COUNT(*) as cnt FROM #table t2 where t.id = t2.id) AS decimal(10,2))) as DistributedQty
FROM #Table t
INNER JOIN #Dist d
ON d.id = t.Id
outputs:
Id BranchCode Qty DistributedQty
1 101 13 20.00000000000
1 102 82 20.00000000000
2 101 10 11.00000000000
2 102 21 11.00000000000
2 103 31 11.00000000000
3 101 11 10.50000000000
3 102 12 10.50000000000
If you need DistributedQty to be an int and retain remainders then I can't think of a better solution than #John Cappelletti's, noting that uneven quantities may not be as exactly even as you might hope (e.g. 32 distributed by three would result in a 12/10/10 distribution instead of an 11/11/10 distribution).

Finding Missing Numbers When Data Is Grouped In SQL Server

I need to to write a query that will calculate the missing numbers in a sequence when the data is "grouped". The data in each group is in sequence, but each individual group would have its own sequence. The data would look something like this:
Id| Number|
-----------
1 | 250 |
1 | 270 | <260 Missing
1 | 280 | <290 Missing
1 | 300 |
1 | 310 |
2 | 110 |
2 | 130 | <120 Missing
2 | 140 |
3 | 260 |
3 | 270 |
3 | 290 | <280 Missing
3 | 300 |
3 | 340 | <310, 320 & 330 Missing
I have found a solution based on this post from CELKO here:
http://bytes.com/topic/sql-server/answers/511668-query-find-missing-number
In essence to set up a demo run the following:
CREATE TABLE Sequence
(seq INT NOT NULL
PRIMARY KEY (seq));
INSERT INTO Sequence VALUES (1);
INSERT INTO Sequence VALUES (2);
INSERT INTO Sequence VALUES (3);
INSERT INTO Sequence VALUES (4);
INSERT INTO Sequence VALUES (5);
INSERT INTO Sequence VALUES (6);
INSERT INTO Sequence VALUES (7);
INSERT INTO Sequence VALUES (8);
INSERT INTO Sequence VALUES (9);
INSERT INTO Sequence VALUES (10);
CREATE TABLE Tickets
(buyer CHAR(5) NOT NULL,
ticket_nbr INTEGER DEFAULT 1 NOT NULL
PRIMARY KEY (buyer, ticket_nbr));
INSERT INTO Tickets VALUES ('a', 2);
INSERT INTO Tickets VALUES ('a', 3);
INSERT INTO Tickets VALUES ('a', 4);
INSERT INTO Tickets VALUES ('b', 4);
INSERT INTO Tickets VALUES ('c', 1);
INSERT INTO Tickets VALUES ('c', 2);
INSERT INTO Tickets VALUES ('c', 3);
INSERT INTO Tickets VALUES ('c', 4);
INSERT INTO Tickets VALUES ('c', 5);
INSERT INTO Tickets VALUES ('d', 1);
INSERT INTO Tickets VALUES ('d', 6);
INSERT INTO Tickets VALUES ('d', 7);
INSERT INTO Tickets VALUES ('d', 9);
INSERT INTO Tickets VALUES ('e', 10);
SELECT DISTINCT T1.buyer, S1.seq
FROM Tickets AS T1, Sequence AS S1
WHERE seq <= (SELECT MAX(ticket_nbr) -- set the range
FROM Tickets AS T2
WHERE T1.buyer = T2.buyer)
AND seq NOT IN (SELECT ticket_nbr -- get missing numbers
FROM Tickets AS T3
WHERE T1.buyer = T3.buyer);
CELKO does mention that this is for a small number of tickets, in my example my numbers table is limited to 200 rows with a single column which is a primary key with each row an increment of 10 as that is what I am interested in. I modified CELKOs query as follows (added in min range):
SELECT DISTINCT T1.buyer, S1.seq
FROM Tickets AS T1, Sequence AS S1
WHERE seq <= (SELECT MIN(ticket_nbr) -- set the MIN range
FROM Tickets AS T2
WHERE T1.buyer = T2.buyer)
AND seq <= (SELECT MAX(ticket_nbr) -- set the MAX range
FROM Tickets AS T2
WHERE T1.buyer = T2.buyer)
AND seq NOT IN (SELECT ticket_nbr -- get missing numbers
FROM Tickets AS T3
WHERE T1.buyer = T3.buyer)
ORDER BY buyer, seq;
The output would be those numbers that are missing:
buyer seq
a 1
b 1
b 2
b 3
e 1
e 2
e 3
e 4
e 5
e 6
e 7
e 8
e 9
This works exactly as I want, however, on my data set it is very slow (11 second run time at the moment - it appears to be the DISTINCT which slows things down tremendously and presumably will gt worse as the base data set grows). I have tried all manner of things to make it more efficient but sadly my ambition exceeds my knowledge. Is it possible to make the query above more efficient/faster. My only constraint is that the dataset I am making needs to be a SQL View (as it feeds a report) and will execute on SQL Azure.
Cheers
David

If my understanding is correct, you want to fill in the missing data from the table. The table would consist of ID and a Number which is incremented by 10.
CREATE TABLE Test(
ID INT,
Number INT
)
INSERT INTO Test VALUES
(1, 250), (1, 270), (1, 280), (1, 300), (1, 310),
(2, 110), (2, 130), (2, 140), (3, 260), (3, 270),
(3, 290), (3, 300), (3, 340);
You could do this by using a Tally Table and doing a CROSS JOIN on the Test table:
;WITH E1(N) AS(
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL
SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
)
,E2(N) AS(SELECT 1 FROM E1 a, E1 b)
,E4(N) AS(SELECT 1 FROM E2 a, E2 b)
,Tally(N) AS(
SELECT TOP (SELECT MAX(Number)/10 FROM Test)
(ROW_NUMBER() OVER(ORDER BY(SELECT NULL)) - 1) * 10
FROM E4
),
MinMax AS(
SELECT
ID,
Minimum = MIN(Number),
Maximum = MAX(Number)
FROM Test
GROUP BY ID
),
CrossJoined AS(
SELECT
m.ID,
Number = Minimum + t.N
FROM MinMax m
CROSS JOIN Tally t
WHERE
Minimum + t.N <= Maximum
)
SELECT * FROM CrossJoined c
ORDER BY c.ID, c.Number
RESULT
ID Seq
----------- --------------------
1 250
1 260
1 270
1 280
1 290
1 300
1 310
2 110
2 120
2 130
2 140
3 260
3 270
3 280
3 290
3 300
3 310
3 320
3 330
3 340
If you only want to find the missing Number from Test grouped by ID, just replace the final SELECT statement:
SELECT * FROM CrossJoined c
ORDER BY c.ID, c.Number
to:
SELECT c.ID, c.Number
FROM CrossJoined c
WHERE NOT EXISTS(
SELECT 1 FROM Test t
WHERE
t.ID = c.ID
AND t.Number = c.Number
)
ORDER BY c.ID, c.Number
RESULT
ID Number
----------- --------------------
1 260
1 290
2 120
3 280
3 310
3 320
3 330