This is my first Stackflow question, I hope someone can help me out with this. I I am completely lost and a newbie at SQL.
I have two tables (which I overly simplified for this question), the first one has the customer info and the car tire that they need. The second one is simply filled with a tire id, and all of the information for the tires. I am trying to input only the customer ID and return the one closest tire that matches the input along with the values of both the selected tire and the customer's tire. The matches also need to be prioritized in that order (size most important, width next most important, ratio is least important). Any suggestions on how to do this or where to start? Is there anything I can look at to help me solve this problem? I have been trying many different procedures, and some nested selects, but nothing is getting me close. Thank you.
customertable (custno, custsize, custwidth, custratio)
1,17,255,50
2,16,235,50
etc...
tirecollection (tireid, tiresize, tirewidth, tireratio)
1,15,225,40
2,16,225,50
3,17,250,55
4,17,235,30
5,18,255,40
etc...
This is not a 100% complete solution, but may work towards coming up with a solution. The approach here is combining the tyre dimensions into one value and then ranking them within a tyre size partition. You could then pass in the customer tyre dimensions to get the closest match.
with CTE
as
(
select *, TyreSize + TyreWidth as [TyreDimensions]
from tblTyres
)
select TC.CustId, C.TyreId, C.TyreSize, C.TyreWidth, C.[TyreDimensions],
rank() over(partition by C.TyreSize order by C.[TyreDimensions]) as [RNK]
from tblTyreCustomer as TC
join CTE as C
on TC.CustTyreSize = C.TyreSize
Assuming you're running SQL Server 2008 or later, this should work (this assumes you want to get a result for a single customer on a case-by-case basis):
CREATE FUNCTION udf.GetClosestTireMatch
(
#CustomerNo int
)
RETURNS TABLE
AS RETURN
SELECT custno, tireid, tiresize, tirewidth, tireratio
FROM (
SELECT ROW_NUMBER() OVER (ORDER BY sizediff, widthdiff, ratiodiff) AS rownum
, c.custno, c.custsize, c.custwidth, c.custratio, t.tireid, t.tiresize, t.tirewidth, t.tireratio
, ABS(c.custsize-t.tiresize) AS sizediff, ABS(c.custwidth-t.tirewidth) AS widthdiff, ABS(c.custratio-t.tireratio) AS ratiodiff
FROM (SELECT * FROM customertable WHERE custno = #CustomerNo) c
CROSS JOIN tirecollection
) sub
WHERE rownum = 1
GO
Then you run the function with:
SELECT * FROM udf.GetClosestTireMatch(5)
(where 5=the customernumber you're querying).
I have come up a situation which is not easy to explain in sentence so i will go ahead and give the complete scenario here.
I have one result set like the below :-
It shows header_equipment_id(s) in a group of jil_equipment_id,relationship_name,cell_group.. For example 3159398,4622903 lies in one group.
The other result set is given below, This is the table where i want to update 3 columns namely Is_Applicable_Price,prc_content_rid,prc_type_name
If you notice clearly, You will find the same header_equipment_id column here. If you group it with the result found above, You will find 3 different groups for. But out of those 3 groups, one group is red, It is red because they belong to different cell_group/relationship_name.
**
Yellow and green are passed scenario and Red, Blue are fail.
**
I want to update the columns Is_Applicable_Price,prc_content_rid,prc_type_name if the Group of header_equipment_id(s) fall under the same cell_group and relationship_name.
So the final result set would look something like below -
Please help me with any inputs if possible. It's a situation where i know one single query won't work. But i will need to have multiple Temp tables for the transformation. But this is the shortest i have came across.
I am using Microsoft sql server 2012.
Please help. Even a small hint would be of great help to me. Thanks in advance.
It seems that the only thing the 2 tables have in common is that a cell_group can have a one or more rows of header_equipment_id. If we can generate a unique value based on header_equipment_id then we can join the 2 tables on this value. Note I have used a simple division , you may wish to check that this method is unique enough for your purposes.
/*create table a
(jil_equimentid int,relationship_name varchar(20),header_equipment_id int,
smart_equipment_id int,cell_group int,new_price_flag int,is_applicable_price int,prc_content_rid int,prc_type_name varchar(20))
truncate table a
insert into a values
(1282977,'default',3159398,1282977,3,1,1,106347924,'New Price'),
(1282977,'default',4622903,1262578,3,1,1,106347924,'New Price'),
(1282977,'default',1659861,1282977,6,1,1,106347925,'New Price'),
(1282977,'default',4622904,1282977,6,1,1,106347925,'New Price')
go
drop table t
go
create table t
(jil_equimentid int,relationship_name varchar(20),header_equipment_id int,
smart_equipment_id int,cell_group int,new_price_flag int,is_applicable_price int,prc_content_rid int,prc_type_name varchar(20))
truncate table t
insert into t values
(1282977,'128297711111 default',4622903,1282977,1,1,null,null,null),
(1282977,'128297711211 default',3159398,1262578,2,1,null,null,null),
(1282977,'128297712111 default',4622904,1282977,4,1,null,null,null),
(1282977,'128297712211 default',1659861,1282977,5,1,null,null,null),
(1282977,'128297711101 default',3159398,1262578,1,1,null,null,null),
(1282977,'128297711101 default',4622903,1282977,1,1,null,null,null),
(1282977,'default' ,3159398,1262578,2,1,null,null,null),
(1282977,'default' ,4622903,1282977,2,1,null,null,null),
(1282977,'128297711101 default',1659861,1262577,3,1,null,null,null),
(1282977,'128297711101 default',4622904,1282977,3,1,null,null,null),
(1282977,'default' ,1659861,1262577,4,1,null,null,null),
(1282977,'default' ,4622904,1262577,4,1,null,null,null)
*/
DROP TABLE #TEMPA;
;WITH CTE AS
(SELECT a.cell_group,
sum(a.header_equipment_id / 10000000.0000) uniqueval
from a
group by a.cell_group
)
SELECT DISTINCT CTE.UNIQUEVAL ,IS_APPLICABLE_PRICE ,PRC_CONTENT_RID ,PRC_TYPE_NAME
INTO #TEMPA
FROM CTE
JOIN A ON A.CELL_GROUP = CTE.CELL_GROUP
;WITH CTE AS
(
SELECT t.relationship_name,t.cell_group,
sum(t.header_equipment_id / 10000000.0000) uniqueval
from t
group by t.relationship_name,t.cell_group having count(*) > 1
)
SELECT T.*,CTE.UNIQUEVAL,ta.*
FROM CTE
JOIN T ON T.RELATIONSHIP_NAME = CTE.RELATIONSHIP_NAME AND T.CELL_GROUP = CTE.CELL_GROUP
join #tempa ta on ta.uniqueval = cte.uniqueval
What's the best way to 'SELECT' a 'DISTINCT' list of a field from a table / view (with 'WHERE' criteria) and alongside that count the number of times that that field content repeats in the table / view?
In other words, I have an initial view that looks a bit like this:
I'd like a single SQL query to filter it (SELECT...WHERE...) so that we are only considering records where [ORDER COMPLETE] = False and [PERSONAL] = Null...
...and then create a distinct list of names with counts of the number of times each name appears in the previous table:
*Displaying the [ORDER COMPLETE] and [PERSONAL] fields is redundant by this point and could be dropped to simplify.
I can do the steps individually as above, but struggling to get a single query to do it all... any help appreciated!
Thanks in advance,
-Tim
This should just be the following
SELECT dbo.tblPerson.Person,
COUNT(dbo.tblPerson.Person) AS Count
FROM dbo.tblPerson
INNER JOIN dbo.tblNotifications ON dbo.tblPerson.PersonID = dbo.tblNotifications.AddresseeID
WHERE dbo.tblNotifications.Complete = 'False'
AND dbo.tblNotifications.Personal IS NULL
GROUP BY dbo.tblPerson.Person
ORDER BY COUNT(dbo.tblPerson.Person) DESC
You don't need your DISTINCT or TOP 100 PERCENT,
Here is a simplified fiddle
Well I got downvoted into oblivion (probably for displaying the full extent of my own ignorance!), but just in case someone from the future experiences the same problem as me and stumbles across this question while Googling (or whatever verb you use for "searching all digitised human knowledge" in the distant future), here's some sanitised code of the query I managed to get to work in the end - thanks to Mark Sinkinson's snippet for helping me realise the obvious...
SELECT DISTINCT TOP (100) PERCENT dbo.tblPerson.Person, COUNT(dbo.tblPerson.Person) AS CountPerson
FROM dbo.tblPerson INNER JOIN
dbo.tblNotifications ON dbo.tblPerson.PersonID = dbo.tblNotifications.AddresseeID
WHERE (dbo.tblNotifications.Complete = 'False') AND (dbo.tblNotifications.Personal IS NULL)
GROUP BY dbo.tblPerson.Person
ORDER BY CountPerson DESC
*EDIT** Thanks for all the input, and sorry for late reply. I have been away during the weekend without access to internet. I realized from the answers that I needed to provide more information, so people could understand the problem more throughly so here it comes:
I am migrating an old database design to a new design. The old one is a mess and very confusing ( I haven't been involved in the old design ). I've attached a picture of the relevent part of the old design below:
The table called Item will exist in the new design as well, and it got all columns that I need in the new design as well except one and it is here my problem begin. I need the column which I named 'neededProp' to be associated( with associated I mean like a column in the new Item table in the new design) with each new migrated row from Item.
So for a particular eid in table Environment there can be n entries in table Item. The "corresponding" set exists in table Room. The only way to know which rows that are associated in Item and Room are with the help of the columns "itemId" and "objectId" in the respective table. So for example for a particular eid there might be 100 entries in Item and Room and their "itemId" and "objectId" can be values from 1 to 100, so that column is only unique for a particular eid ( or baseSeq which it is called in table BaseFile).
Basically you can say that the tables Environment and BaseFile reminds of each other and the tables Item and Room reminds of each other. The difference is that some tables lack some columns and other may have some extra. I have no idea why it is designed like this from the beginning.
My question is if someone can help me with creating a query so that I can be able to find out the proper "neededProp" for each row in the Item-table so I can get that data into the new design?
*OLD-PART**This might be a trivial question but I can't get it to work as I want. I want to join a few tables as in the sql-statement below. If I start like this and run this query
select * from Environment e
join items ei on e.eid = ei.eid
I get like 400000 rows which is what I want. However if I add one more line so it looks like this:
select * from Environment e
join items ei on e.eid= ei.eid
left join Room r on e.roomnr = r.roomobjectnr
I get an insane amount of rows so there must be some multiplication going on. I want to get the same amount of rows ( like 400000 in this case ) even after joining the third table. Is that possible somehow? Maybe like creating a temporary view with the first 2 rows.
I am using MSSQL server.
So without knowing what data you have in your second query it's very difficult to say exactly how to write this out, and you're likely having a problem where there's an additional column that you are joining to in Rooms that perhaps you have forgotten such as something indicating a facility or hallway perhaps where you have multiple 'Room 1' entries as an example.
However, to answer your question regarding another way to write this out without using a temp table I've crufted up the below as an example of using a common table expression which will only return one record per source row.
;WITH cte_EnvironmentItems AS (
SELECT *
FROM Environment E
INNER JOIN Items I ON I.eid = E.eid
), cte_RankedRoom AS (
SELECT *
,ROW_NUMBER() OVER (ORDER BY R.UpdateDate DESC) [RN]
FROM Room R
)
SELECT *
FROM cte_EnvironmentItems E
LEFT JOIN cte_RankedRoom R ON E.roomnr = R.roomobjectnr
AND R.RN = 1
btw,do you want column from room table.if no then
select * from Environment e
join items ei on e.eid= ei.eid
where e.roomnr in (select r.roomobjectnr from Room r )
else
select * from Environment e
join items ei on e.eid= ei.eid
left join (select distinct roomobjectnr from Room) r on e.roomnr = r.roomobjectnr
I will re-write my doubt to be more easy to understand.
I have one table named SeqNumbers that have only one column of data named PossibleNumbers, that has value from 1 to 10.000.
Then I have another Table named Terminals and one of the columns have the serial numbers of the terminals. What I want is get all the SerialNumbers that not exists in the Terminals table from 1 to 10.000.
I've created the SeqNumbers table only to do this... maybe there's another solution without using it... that's fine to me.
The query I have is:
SELECT PossibleNumbers from SeqNumbers
Where PossibleNumbers NOT IN (SELECT SerialNumbers from Terminals)**
Basically I want to list ALL serial numbers of terminals that doesn't exists in the database.
This Query works fine I think... but the problem is that I don't want all results in a single column.. I want these results displayed in 4 or 5 columns.
For my purpose I can only use the results from the query like that. I cannot use programmatically methods to do that.
Hope this is more clear now... Thanks for all the help...
select x, x+1000 from tablename
Will that do it for you?
If I'm reading this right, you'd probably have to do a self join; something like:
SELECT
LeftValues.ColA,
RightValues.ColA AS ColB
FROM YourTable LeftValues
LEFT JOIN YourTable RightValues ON LeftValues.ColA = RightValues.ColA - 1000
WHERE LeftValues.ColA < 1000
Note: Use the JOIN that makes sense for you (left if you are willing to accept NULLs in ColB, inner if you only want them where both values exist)
You can use a scripting language to parse the MySQL results to format it anyway you like. Are you using PHP to access the database? If so, let me know and I can cook one up for you.
I just saw your new updated question. In this case the order of the columns will be ordered by your SELECT statement and you can also sort too. Here is an example:
SELECT Column1, Column2 FROM my_table ORDER BY Column1, Column2 ASC