I have the following tables:
MASTER table (ID(PK), NAME, etc)
DETAIL table (ID(PK), IDMASTER(FK), VALUE1, DATE1, etc)
What I need is a SQL query or a way to do a select like
I work with SQL Server.
What I need is a SQL query or a way to do a select like
SELECT
M.ID, M.NAME,
(SELECT TOP 1 DT.ID, DT.VALUE1
FROM DETAIL D
WHERE D.IDMASTER = M.ID
ORDER BY DATE 1 DESC)
-- more than one column with a where clause and an order clause
FROM
MASTER M
Use OUTER APPLY:
SELECT M.ID,
M.NAME
D.ID,
D.VALUE1
FROM dbo.[MASTER] M
OUTER APPLY(SELECT TOP 1 ID, VALUE1
FROM dbo.DETAIL
WHERE IDMASTER = M.ID
ORDER BY [DATE] DESC) D;
You do this with APPLY operator:
select * from master m
outer apply(select top 1 * from detail d where d.masterid = m.id order by d.date1 desc)oa
Related
I have following result set,
Now with above results i want to print the records via select query as below attached image
Please note, I will have only two types of columns in output Present Employee & Absent Employees.
I tried using pivot tables, temporary table but cant achieve what I want.
One method would be to ROW_NUMBER each the the "statuses" and then use a FULL OUTER JOIN to get the 2 datasets into the appropriate columns. I use a FULL OUTER JOIN as I assume you could have a different amount of employees who were present/absent.
CREATE TABLE dbo.YourTable (Name varchar(10), --Using a name that doesn't require delimit identification
Status varchar(7), --Using a name that doesn't require delimit identification
Days int);
GO
INSERT INTO dbo.YourTable(Name, Status, Days)
VALUES('Mal','Present',30),
('Jess','Present',20),
('Rick','Absent',30),
('Jerry','Absent',10);
GO
WITH RNs AS(
SELECT Name,
Status,
Days,
ROW_NUMBER() OVER (PARTITION BY Status ORDER BY Days DESC) AS RN
FROM dbo.YourTable)
SELECT P.Name AS PresentName,
P.Days AS PresentDays,
A.Name AS AbsentName,
A.Days AS AbsentDays
FROM (SELECT R.Name,
R.Days,
R.Status,
R.RN
FROM RNs R
WHERE R.Status = 'Present') P
FULL OUTER JOIN (SELECT R.Name,
R.Days,
R.Status,
R.RN
FROM RNs R
WHERE R.Status = 'Absent') A ON P.RN = A.RN;
GO
DROP TABLE dbo.YourTable;
db<>fiddle
2 CTE's is actually far neater:
WITH Absents AS(
SELECT Name,
Status,
Days,
ROW_NUMBER() OVER (ORDER BY Days DESC) AS RN
FROM dbo.YourTable
WHERE Status = 'Absent'),
Presents AS(
SELECT Name,
Status,
Days,
ROW_NUMBER() OVER (ORDER BY Days DESC) AS RN
FROM dbo.YourTable
WHERE Status = 'Present')
SELECT P.Name AS PresentName,
P.Days AS PresentDays,
A.Name AS AbsentName,
A.Days AS AbsentDays
FROM Absents A
FULL OUTER JOIN Presents P ON A.RN = P.RN;
I have the following code:
IF (OBJECT_ID('tempdb..#Data') IS NOT NULL)
BEGIN
DROP TABLE #Data
END
SELECT
t.Name, x.Time, x.Date, x.Total,
xo.DrvCommTotal, x.Name2, x.Street, x.Zip,
r.Route1
INTO
#Data
FROM
table1 xo WITH(NOLOCK)
LEFT JOIN
Table2 t WITH(NOLOCK) ON t.ID = x.ID
LEFT JOIN
Route1 r ON r.RouteID = x.RouteID
WHERE
x.Client = 1
AND x.Date = '9/13/2018'
GROUP BY
t.Name, x.Time, x.Date, x.Total, xo.DrvCommTotal, x.Name2,
x.Street, x.Zip, r.Route1
ORDER BY
Route1
SELECT DISTINCT
F.*, F2.NumOrders
FROM
#Data F
LEFT JOIN
(SELECT
Route1, COUNT(*) NumOrders
FROM
#Data
GROUP BY
Route1) F2 ON F2.Route1 = F.Route1
LEFT OUTER JOIN
(SELECT
Street + ',' + Zip Stops, Time, RouteN1
FROM
#Data
GROUP BY
RouteNo1, street, Zip) F3 ON F3.Route1 = F.Route1
WHERE
F.Route1 IS NOT NULL
ORDER BY
F.Route1
and it provides me with a list of routes and stops. The column NumOrders lets me know how many orders are on each route. I need the stops to become individual columns I will label Stop1, Stop2, etc. so that each route is only one row and all the information is contained on the row for one route.
I'm currently using the temp table because the data is so large. I can play with my SELECT statement without having to re-run the entire code.
How do I move the stops for each route into columns?
Hum.. Not quite sure I understand the question but it sounds that you want to pivot the data so that the routes break into columns. If so, I would use a sql Pivot. Here is an example from the documentation:
USE AdventureWorks2014;
GO
SELECT VendorID, [250] AS Emp1, [251] AS Emp2, [256] AS Emp3, [257] AS Emp4, [260] AS Emp5
FROM
(SELECT PurchaseOrderID, EmployeeID, VendorID
FROM Purchasing.PurchaseOrderHeader) p
PIVOT
(
COUNT (PurchaseOrderID)
FOR EmployeeID IN
( [250], [251], [256], [257], [260] )
) AS pvt
ORDER BY pvt.VendorID;
Also, here is the link to how to use pivot: https://learn.microsoft.com/en-us/sql/t-sql/queries/from-using-pivot-and-unpivot?view=sql-server-2017
Since you already have all the data in your temp table, you could pivot that on the way out.
I am stuck with this. I have a simple set-up with two tables. One table is holding emailaddresses one table is holding vouchercodes. I want to join them in a third table, so that each emailaddress has one random vouchercode.
Unfortunatly I am stuck with this as there are no identic Ids to match both values. What I have so far brings no result:
Select
A.Email
B.CouponCode
FROM Emailaddresses as A
JOIN CouponCodes as B
on A.Email = B.CouponCode
A hint would be great as search did not bring me any further yet.
Edit -
Table A (Addresses)
-------------------
Column A | Column B
-------------------------
email1#gmail.com True
email2#gmail.com
email3#gmail.com True
email4#gmail.com
Table B (Voucher)
-------------------
ABCD1234
ABCD5678
ABCD9876
ABCD5432
Table C
-------------------------
column A | column B
-------------------------
email1#gmail.com ABCD1234
email2#gmail.com ABCD5678
email3#gmail.com ABCD9876
email4#gmail.com ABCD5432
Sample Data:
While joining without proper keys is not a good solution, for your case you can try this. (note: not tested, just a quick suggestion)
;with cte_email as (
select row_number() over (order by Email) as rownum, Email
from Emailaddresses
)
;with cte_coupon as (
select row_number() over (order by CouponCode) as rownum, CouponCode
from CouponCodes
)
select a.Email,b.CouponCode
from cte_email a
join cte_coupon b
on a.rownum = b.rownum
You want to randomly join records, one email with one coupon each. So create random row numbers and join on these:
select
e.email,
c.couponcode
from (select t.*, row_number() over (order by newid()) as rn from emailaddresses t) e
join (select t.*, row_number() over (order by newid()) as rn from CouponCodes t) c
on c.rn = e.rn;
Give a row number for both the tables and join it with row number.
Query
;with cte as(
select [rn] = row_number() over(
order by [Column_A]
), *
from [Table_A]
),
cte2 as(
select [rn] = row_number() over(
order by [Column_A]
), *
from [Table_B]
)
select t1.[Column_A] as [Email_Id], t2.[Column_A] as [Coupon]
from cte t1
join cte2 t2
on t1.rn = t2.rn;
Find a demo here
I want to use left outer join like this:
SELECT ...
FROM Table1
LEFT OUTER JOIN
(SELECT only e.g. 3rd record... , SomeField FROM Table2) tbl2
ON Table1.SomeField = tbl2.SomeField
How can I do that, if I need the subquery to select not just the 3rd record from Table2, but the 3rd record among the Table2 records that have SomeField = Table1.SomeField?
Thanks.
If this is sql server 2005 or newer, you might use row_number():
LEFT JOIN
(
select *
from
(
select *,
row_number() over (order by something) rn
from Table2
where Table2.Column = Table1.Column
) a
where a.rn = 3
) a
Unfortunately you need to nest it a level deeper because you cannot use row_number in a condition directly.
EDIT:
My bad - i didn't really notice the join part. If you want to join derived table, use this:
LEFT JOIN
(
select *,
row_number() over (partition by SomeField order by something) rn
from Table2
) tbl2
ON Table1.SomeField = tbl2.SomeField
AND tbl2.rn = 3
Note: you need ORDER BY in row_number() to keep things consistent.
If I have the following full text search query:
SELECT *
FROM dbo.Product
INNER JOIN CONTAINSTABLE(Product, (Name, Description, ProductType), 'model') ct
ON ct.[Key] = Product.ProductID
Is it possible to weigh the columns that are being searched?
For example, I care more about the word model appearing in the Name column than I do the
Description or ProductType columns.
Of course if the word is in all 3 columns then I would expect it to rank higher than if it was just in the name column. Is there any way to have a row rank higher if it just appears in Name vs just in Description/ProductType?
You can do something like the following query. Here, WeightedRank is computed by multiplying the rank of the individual matches. NOTE: unfortunately I don't have Northwind installed so I couldn't test this, so look at it more like pseudocode and let me know if it doesn't work.
declare #searchTerm varchar(50) = 'model';
SELECT 100 * coalesce(ct1.RANK, 0) +
10 * coalesce(ct2.RANK, 0) +
1 * coalesce(ct3.RANK, 0) as WeightedRank,
*
FROM dbo.Product
LEFT JOIN
CONTAINSTABLE(Product, Name, #searchTerm) ct1 ON ct1.[Key] = Product.ProductID
LEFT JOIN
CONTAINSTABLE(Product, Description, #searchTerm) ct2 ON ct2.[Key] = Product.ProductID
LEFT JOIN
CONTAINSTABLE(Product, ProductType, #searchTerm) ct3 ON ct3.[Key] = Product.ProductID
order by WeightedRank desc
Listing 3-25. Sample Column Rank-Multiplier Search of Pro Full-Text Search in SQL Server 2008
SELECT *
FROM (
SELECT Commentary_ID
,SUM([Rank]) AS Rank
FROM (
SELECT bc.Commentary_ID
,c.[RANK] * 10 AS [Rank]
FROM FREETEXTTABLE(dbo.Contributor_Birth_Place, *, N'England') c
INNER JOIN dbo.Contributor_Book cb ON c.[KEY] = cb.Contributor_ID
INNER JOIN dbo.Book_Commentary bc ON cb.Book_ID = bc.Book_ID
UNION ALL
SELECT c.[KEY]
,c.[RANK] * 5
FROM FREETEXTTABLE(dbo.Commentary, Commentary, N'England') c
UNION ALL
SELECT ac.[KEY]
,ac.[RANK]
FROM FREETEXTTABLE(dbo.Commentary, Article_Content, N'England') ac
) s
GROUP BY Commentary_ID
) s1
INNER JOIN dbo.Commentary c1 ON c1.Commentary_ID = s1.Commentary_ID
ORDER BY [Rank] DESC;
Similar to Henry's solution but simplified, tested and using the details the question provided.
NB: I ran performance tests on both the union and left join styles and found the below to require far less logical reads on the union style below with my datasets YMMV.
declare #searchTerm varchar(50) = 'model';
declare #nameWeight int = 100;
declare #descriptionWeight int = 10;
declare #productTypeWeight int = 1;
SELECT ranksGroupedByProductID.*, outerProduct.*
FROM (SELECT [key],
Sum([rank]) AS WeightedRank
FROM (
-- Each column that needs to be weighted separately
-- should be added here and unioned with the other queries
SELECT [key],
[rank] * #nameWeight as [rank]
FROM Containstable(dbo.Product, [Name], #searchTerm)
UNION ALL
SELECT [key],
[rank] * #descriptionWeight as [rank]
FROM Containstable(dbo.Product, [Description], #searchTerm)
UNION ALL
SELECT [key],
[rank] * #productTypeWeight as [rank]
FROM Containstable(dbo.Product, [ProductType], #searchTerm)
) innerSearch
-- Grouping by key allows us to sum each ProductID's ranks for all the columns
GROUP BY [key]) ranksGroupedByProductID
-- This join is just to get the full Product table columns
-- and is optional if you only need the ordered ProductIDs
INNER JOIN dbo.Product outerProduct
ON outerProduct.ProductID = ranksGroupedByProductID.[key]
ORDER BY WeightedRank DESC;