I have data in table -> bp like below
1 Vendor
2 Customer
3 Transporter
I want select * from bp order by row value 2,1,3, like this the result should be:
2 Customer
1 Vendor
3 Transporter
As the ordering isn't alphabetic or numeric, and appears somewhat arbitrary, then use a case statement. However this doesn't support growth and code would have to be changed anytime a new value is presented in col2. You'd be better off including an orderBy Column in the base table containing these values. and allowing a user to specify order for long term usability. Why tie a user into a specific order... Seems odd but this is the way to do it.
SELECT *
FROM bp
order by CASE when col2='Customer' then 1
when col2='Vendor' then 2
when col2='Transporter' then 3
else then 4 end;
Try This:-
Add One More Column SortBy and Add Values Like first digit shows one type of sort, second digit second type and third digit third type. Its a one and very simple way. If records are more then you can arrange it in other ways.
1 Vendor 132
2 Customer 213
3 Transporter 321
Vendor --> select * from bp order by substring(SortBy,1,1)
Customer --> select * from bp order by substring(SortBy,2,1)
Transporter --> select * from bp order by substring(SortBy,3,1)
Related
I will need your help to generate random records from the table tblFruit based on the field Type (without no duplication)
As per the above table.
There are 4 type of fruit number 1,2,3,4
I want to generate x records dynamically from the table tblFruit (e.g 7 records).
Let say I need to get 7 random record of fruit .
My result should contains fruit of the different types. However, we need to ensure that the result contains only 7 records.
i.e
2 records of type 1,
2 records of type 2,
2 records of type 3,
1 records of type 4
e.g
Note: If i want to generate 10 records (without no duplication),
then i will get 2 records of each type and the two remaining records randomly of any type.
Much grateful for your help.
I might suggest:
select top (7) f.*
from tblfruit f
order by row_number() over (partition by type order by newid());
This will actually produce a result with approximately the same number of rows of each type (well, off by 1), but that meets your needs.
I have two tables. I want to find the erroneous records in the first table based on the fact that they aren't complete set as determined by the second table. eg:
custID service transID
1 20 1
1 20 2
1 50 2
2 49 1
2 138 1
3 80 1
3 140 1
comboID combinations
1 Y00020Y00050
2 Y00049Y00138
3 Y00020Y00049
4 Y00020Y00080Y00140
So in this example I would want a query to return the first row of the first table because it does not have a matching 49 or 50 or (80 and 140), and the last two rows as well (because there is no 20). The second transaction is fine, and the second customer is fine.
I couldn't figure this out with a query, so I wound up writing a program that loads the services per customer and transid into an array, iterates over them, and ensures that there is at least one matching combination record where all the services in the combination are present in the initially loaded array. Even that came off as hamfisted, but it was less of a nightmare than the awkward outer joining of multiple joins I was trying to accomplish with SQL.
Taking a step back, I think I need to restructure the combinations table into something more accommodating, but I still can't think of what the approach would be.
I do not have DB2 so I have tested on Oracle. However listagg function should be there as well. The table service is the first table and comb the second one. I assume the service numbers to be sorted as in the combinations column.
select service.*
from service
join
(
select S.custid, S.transid
from
(
select custid, transid, listagg(concat('Y000',service)) within group(order by service) as agg
from service
group by custid, transid
) S
where not exists
(
select *
from comb
where S.agg = comb.combinations
)
) NOT_F on NOT_F.custid = service.custid and NOT_F.transid = service.transid
I dare to say that your database design does not conform to the first normal form since the combinations column is not atomic. Think about it.
I have a DB which 'tracks' the customer shopping journey. What I want to do is recall the previous value if their final destination or 'shop' is a particular value.
For example say the shops are named like this:
Shop 1
Shop 2
Shop 3
Shop 4
If my select query returns Shop 4 (for any customer) then I want the extra column to show the previous shop they last shopped at. There is no natural order to my data so I can't literally state that Shop 4 = Shop 3 it just needs to return whatever shop they last shopped at if the last one is Shop 4 (there previous shop could be any 'shop').
This is what I have so far but it's probably way off the mark. I have a date column in my table but don't know how to use it in this way.
Select ...
case
when TableShop.ShopName LIKE 'Shop4' then
cast(TableShop.ShopName -1 AS nvarchar(50))
end
From ...
Presumably, you have some column that specifies the ordering of the visits -- say a visitDatetime column.
Then, you can use the ANSI standard LAG() function:
select s.*,
(case when s.shopName = 'Shop4'
then lag(s.shopName) over (partition by customerId order by visitDateTime)
end) as prev_ShopName
from tableshop s;
I have list of Ids 31165,31160,31321,31322,31199,31136 which is dynamic.
When I run query
select id,name from master_movievod where id in(31165,31160,31321,31322,31199,31136);
I get following result
31136|Independence Day
31160|Planet of the Apes
31165|Mrs. Doubtfire
31199|Moulin Rouge
31321|Adult Movie 2
31322|Adult Movie 3
This is sorted list in ascending order.
I want the list in the same order which I give as input like
31165|Mrs. Doubtfire
31160|Planet of the Apes
31321|Adult Movie 2
31322|Adult Movie 3
31199|Moulin Rouge
31136|Independece Day
Without an order by clause, there's no guarantee on the order a database returns the results to you. SQLite, unfortunately, doesn't have something like MySQL's field for custom sorting, but you can jimmy-rig something with a case expression:
SELECT id, name
FROM master_movievod
WHERE id IN (31165, 31160, 31321, 31322, 31199, 31136)
ORDER BY CASE ID WHEN 31165 THEN 0
WHEN 31160 THEN 1
WHEN 31321 THEN 2
WHEN 31322 THEN 3
WHEN 31199 THEN 4
WHEN 31136 THEN 5
END ASC
Unfortunately, SQLite does not have an option like MySQL's FIELD for doing a custom ordering. You are left with two options. The first is that you could create a custom table containing the ordering you want and use that to sort. This option isn't very attractive. The second (and easier) option is to use ORDER BY CASE to achieve the order you want:
SELECT id, name FROM master_movievod
WHERE id IN (31165,31160,31321,31322,31199,31136)
ORDER BY
CASE id
WHEN 31165 THEN 0
WHEN 31160 THEN 1
WHEN 31321 THEN 2
WHEN 31322 THEN 3
WHEN 31199 THEN 4
WHEN 31136 THEN 5
END ASC
I have a query similar to the following:
SELECT CASE WHEN (GROUPING(Name) = 1) THEN 'All' ELSE Name END AS Name,
CASE WHEN (GROUPING(Type) = 1) THEN 'All' ELSE Type END AS Type,
sum(quantity) AS [Quantity],
CAST(sum(quantity) * (SELECT QuantityMultiplier FROM QuantityMultipliers WHERE a = t.b) AS DECIMAL(18,2)) AS Multiplied Quantity
FROM #Table t
GROUP BY Name, Type WITH ROLLUP
I'm trying to return a list of Names, Types, a summed Quantity and a summed quantity multiplied by an arbitrary number. All fine so far. I also need to return a sub-total row per Name and per Type, such as the following
Name Type Quantity Multiplied Quantity
------- --------- ----------- -------------------
a 1 2 4
a 2 3 3
a ALL 5 7
b 1 6 12
b 2 1 1
b ALL 7 13
ALL ALL 24 40
The first 3 columns are fine. I'm getting null values in the rollup rows for the multiplied quantity though. The only reason I can think this is happening is because SQL doesn't recognize the last column as an aggregate now that I've multiplied it by something.
Can I somehow work around this without things getting too convoluted?
I will be falling back onto temporary tables if this can't be done.
In your sub-query to acquire the multiplier, you have WHERE a=b. Are either a or b from the tables in your main query?
If these values are static (nothing to do with the main query), it looks like it should be fine...
If the a or b values are the name or type field, they can be NULL for the rollup records. If so, you can change to something similiar to...
CAST(sum(quantity * (<multiplie_query>)) AS DECIMAL(18,2)).
If a or b are other field from your main query, you'd be getting multiple records back, not just a single multiplier. You could change to something like...
CAST(sum(quantity) * (SELECT MAX(multiplier) FROM ...)) AS DECIMAL(18,2))