I have a table called userInfo that has data similar to the following:
Id, Field, Value
---------------------
1, FirstName, John
1, LastName, Smith
1, Age, 25
1, Gender, Male
2, FirstName, Jane
2, LastName, Smythe
2, Age, 24
2, Gender, Female
What I need is some T-SQL that will produce a single row for each Id with the following structure:
Row:1
<FieldValues>
<FirstName>John</FirstName>
<LastName>Smith</LastName>
<Age>25</Age>
<Gender>Male</Gender>
</FieldValues>
Row:2
<FieldValues>
<FirstName>Jane</FirstName>
<LastName>Smythe</LastName>
<Age>24</Age>
<Gender>Female</Gender>
</FieldValues>
I have tried a couple of things to get this but can't get figure this out.
Edit:
The list of Fields I provided here (i.e. FirstName, LastName, etc) is not a static list of fields. I will be adding and taking away from this list all the time so the query would be able to handle this automatically). Ideally I could use something like FOR XML PATH('FieldValues')
You can build your XML as a string using for xml path('') and then cast to XML.
select T.Id,
cast('<FieldValues>' + (
select '<'+T2.Field+'>'+
(select T2.Value as '*' for xml path(''))+
'</'+T2.Field+'>'
from dbo.YourTable as T2
where T.Id = T2.Id
for xml path(''), type
).value('text()[1]', 'varchar(max)') +
'</FieldValues>' as xml) as FieldValues
from dbo.YourTable as T
group by T.Id;
SQL Fiddle
This part (select T2.Value as '*' for xml path('')) is there to take care of characters that needs to be entities in the value like &.
Here is one way:
SELECT '<FieldValues>'+
'<FirstName>'+fn.Value +'</FirstName>' +
'<LastName>'+ln.Value +'</LastName>' +
'<Age>'+age.Value +'</Age>' +
'<Gender>'+gender.Value +'</Gender>' +
'</FieldValues>
FROM (SELECT DISTINCT ID FROM userInfo) t
JOIN userInfo fn ON t.ID = fn.ID and fn.Field = 'FirstName'
JOIN userInfo ln ON t.ID = ln.ID and ln.Field = 'LastName'
JOIN userInfo age ON t.ID = age.ID and age.Field = 'Age'
JOIN userInfo gender ON t.ID = gender.ID and gender.Field = 'Gender'
How this works:
First I create table of just the unique ID numbers.
SELECT DISTINCT ID FROM table
Then I use this table to join back to the main table for each field. (Each of these joins will have only one row per ID.)
JOIN table fn ON t.ID = fn.ID and fn.Field = 'FirstName'
JOIN table ln ON t.ID = ln.ID and ln.Field = 'LastName'
JOIN table age ON t.ID = age.ID and age.Field = 'Age'
JOIN table gender ON t.ID = gender.ID and gender.Field = 'Gender'
Finally I create a string formatted as you need.
'<FieldValues>'+
'<FirstName>'+fn.Value +'</FirstName>' +
'<LastName>'+ln.Value +'</LastName>' +
'<Age>'+age.Value +'</Age>' +
'<Gender>'+gender.Value +'</Gender>' +
'</FieldValues>
An additional note: It is recommended to not use Camel Case on your xml since xml is case sensitive any use of case is a pain -- most just use all lower case.
Related
I have a query that returns a list of services and ContractorIDs. I need to stuff these services into a field to join them with another select statement by ContractorID, but I can't figure out how to do it.
The Select that lists the services is "
SELECT DISTINCT SM.ContractorID,
CASE WHEN S.bitRestrictedSelection = 1
THEN S.vchDescription + '*'
ELSE S.vchDescription
END AS vchDescription
FROM tblAscServiceRegionToOperator SRTO
INNER JOIN tblServiceMatrix SM
ON SRTO.OperatorID = 12624
AND SM.ServiceRegionID = SRTO.ServiceRegionID
AND SM.bitPrimaryService = 1
INNER JOIN tblServices S
ON S.ServiceID = SM.ServiceID
This produces the following:
In the example, for Contractor #16 He has 4 services I need to put them in one field called services by joining with another Select statement
I tried the following, but I get errors:
Select DISTINCT CompanyID, vchCompanyName as CompanyName,vchFIDNumber,vchPrimContactName, vchPrimContactEmail
,stuff((','
SELECT DISTINCT
SM.ContractorID,
CASE WHEN S.bitRestrictedSelection = 1
THEN S.vchDescription + '*'
ELSE S.vchDescription
END AS vchDescription
FROM tblAscServiceRegionToOperator SRTO
INNER JOIN tblServiceMatrix SM
ON SRTO.OperatorID = 12624
AND SM.ServiceRegionID = SRTO.ServiceRegionID
AND SM.bitPrimaryService = 1
INNER JOIN tblServices S
ON S.ServiceID = SM.ServiceID
FOR XML PATH('')
), 1, 1, '') as Services from tblCompany
Any assistance is greatly appreciated!!!
The following query would work:
SELECT SS.contractor Contractor,
STUFF((SELECT '; ' + US.vchdescription
FROM ServicesList US
WHERE US.contractor = SS.contractor
FOR XML PATH('')), 1, 1, '') [Services]
FROM ServicesList SS
GROUP BY SS.contractor
ORDER BY 1
I have created a table and inserted there two rows for contractor = 16, for you to get the idea.
You can use the suggestion given to you in the comments, to wrap the first select into a CTE and then perform the STUFF function on that CTE.
You can check a demo of this query here.
First when I started this project seemed very simple. Two tables, field tbl1_USERMASTERID in Table 1 should be update from field tbl2_USERMASTERID Table 2. After I looked deeply in Table 2, there is no unique ID that I can use as a key to join these two tables. Only way to match the records from Table 1 and Table 2 is based on FIRST_NAME, LAST_NAME AND DOB. So I have to find records in Table 1 where:
tbl1_FIRST_NAME equals tbl2_FIRST_NAME
AND
tbl1_LAST_NAME equals tbl2_LAST_NAME
AND
tbl1_DOB equals tbl2_DOB
and then update USERMASTERID field. I was afraid that this can cause some duplicates and some users will end up with USERMASTERID that does not belong to them. So if I find more than one record based on first,last name and dob those records would not be updated. I would like just to skip and leave them blank. That way I wouldn't populate invalid USERMASTERID. I'm not sure what is the best way to approach this problem, should I use SQL or ColdFusion (my server side language)? Also how to detect more than one matching record?
Here is what I have so far:
UPDATE Table1 AS tbl1
LEFT OUTER JOIN Table2 AS tbl2
ON tbl1.dob = tbl2.dob
AND tbl1.fname = tbl2.fname
AND tbl1.lname = tbl2.lname
SET tbl1.usermasterid = tbl2.usermasterid
WHERE LTRIM(RTRIM(tbl1.usermasterid)) = ''
Here is query where I tried to detect duplicates:
SELECT DISTINCT
tbl1.FName,
tbl1.LName,
tbl1.dob,
COUNT(*) AS count
FROM Table1 AS tbl1
LEFT OUTER JOIN Table2 AS tbl2
ON tbl1.dob = tbl2.dob
AND tbl1.FName = tbl2.first
AND tbl1.LName = tbl2.last
WHERE LTRIM(RTRIM(tbl1.usermasterid)) = ''
AND LTRIM(RTRIM(tbl1.first)) <> ''
AND LTRIM(RTRIM(tbl1.last)) <> ''
AND LTRIM(RTRIM(tbl1.dob)) <> ''
GROUP BY tbl1.FName,tbl1.LName,tbl1.dob
Some data after I tested query above:
First Last DOB Count
John Cook 2008-07-11 2
Kate Witt 2013-06-05 1
Deb Ruis 2016-01-22 1
Mike Bennet 2007-01-15 1
Kristy Cruz 1997-10-20 1
Colin Jones 2011-10-13 1
Kevin Smith 2010-02-24 1
Corey Bruce 2008-04-11 1
Shawn Maiers 2016-08-28 1
Alenn Fitchner 1998-05-17 1
If anyone have idea how I can prevent/skip updating duplicate records or how to improve this query please let me know. Thank you.
You could check for and avoid duplicate matches using with common_table_expression (Transact-SQL)
along with row_number()., like so:
with cte as (
select
t.fname
, t.lname
, t.dob
, t.usermasterid
, NewUserMasterId = t2.usermasterid
, rn = row_number() over (partition by t.fname, t.lname, t.dob order by t2.usermasterid)
from table1 as t
inner join table2 as t2 on t.dob = t2.dob
and t.fname = t2.fname
and t.lname = t2.lname
and ltrim(rtrim(t.usermasterid)) = ''
)
--/* confirm these are the rows you want updated
select *
from cte as t
where t.NewUserMasterId != ''
and not exists (
select 1
from cte as i
where t.dob = i.dob
and t.fname = i.fname
and t.lname = i.lname
and i.rn>1
);
--*/
/* update those where only 1 usermasterid matches this record
update t
set t.usermasterid = t.NewUserMasterId
from cte as t
where t.NewUserMasterId != ''
and not exists (
select 1
from cte as i
where t.dob = i.dob
and t.fname = i.fname
and t.lname = i.lname
and i.rn>1
);
--*/
I use the cte to extract out the sub query for readability. Per the documentation, a common table expression (cte):
Specifies a temporary named result set, known as a common table expression (CTE). This is derived from a simple query and defined within the execution scope of a single SELECT, INSERT, UPDATE, or DELETE statement.
Using row_number() to assign a number for each row, starting at 1 for each partition of t.fname, t.lname, t.dob. Having those numbered allows us to check for the existence of duplicates with the not exists() clause with ... and i.rn>1
You could use a CTE to filter out the duplicates from Table1 before joining:
; with CTE as (select *
, count(ID) over (partition by LastName, FirstName, DoB) as IDs
from Table1)
update a
set a.ID = b.ID
from Table2 a
left join CTE b
on a.FirstName = b.FirstName
and a.LastName = b.LastName
and a.Dob = b.Dob
and b.IDs = 1
This will work provided there are no exact duplicates (same demographics and same ID) in table 1. If there are exact duplicates, they will also be excluded from the join, but you can filter them out before the CTE to avoid this.
Please try below SQL:
UPDATE Table1 AS tbl1
INNER JOIN Table2 AS tbl2
ON tbl1.dob = tbl2.dob
AND tbl1.fname = tbl2.fname
AND tbl1.lname = tbl2.lname
LEFT JOIN Table2 AS tbl3
ON tbl3.dob = tbl2.dob
AND tbl3.fname = tbl2.fname
AND tbl3.lname = tbl2.lname
AND tbl3.usermasterid <> tbl2.usermasterid
SET tbl1.usermasterid = tbl2.usermasterid
WHERE LTRIM(RTRIM(tbl1.usermasterid)) = ''
AND tbl3.usermasterid is null
Sometimes you want to append a string or int to the data in a given column, such as SELECT 1005 + ID FROM Users (where you'd be adding 1005 to the ID column data). How can this be done for columns that are created dynamically?
The following works:
SELECT ID,
Name,
(SELECT Email FROM Emails WHERE Emails.ID = d.ID) AS Email,
Address
FROM data d
But adding the following new line creates the error Invalid column name "Email":
SELECT ID,
Name,
(SELECT Email FROM Emails WHERE Emails.ID = d.ID) AS Email,
Email + ' testing ' AS Test, /* New line that causes error */
Address
FROM data d
How to fix this error?
You can't reference an alias. You can repeat the expression (usually unwise performance-wise and/or undesirable syntax-wise) or use a subquery / CTE. And why are you using a correlated subquery instead of a join?
SELECT ID, Name, Email, Email + ' testing' AS Test, Address
FROM
(
SELECT d.ID, d.Name, e.Email, d.Address
FROM dbo.data AS d
INNER JOIN dbo.Emails AS e
ON e.ID = d.ID
) AS x;
...or a CTE...
;WITH x AS
(
SELECT d.ID, d.Name, e.Email, d.Address
FROM dbo.data AS d
INNER JOIN dbo.Emails AS e
ON e.ID = d.ID
)
SELECT ID, Name, Email, Email + ' testing' AS Test, Address
FROM x;
This is something that should not be done in a subquery, use a join instead. Correlated subqueries in genral are a poor technique as they can be performance killers and they are only rarely needed. They should be a technique of last resort not a technique of first resort.
SELECT ID,
Name,
Email,
Email + ' testing ' AS Test,
Address
FROM data d
JOIN Emails e ON e.ID = d.ID
If everyone won't have an email use a left join. If there are multipel email addresses then you may need some addtional criteria to filter on or you may need to use aggregae functions.
It looks like the problem your having is that you are trying to reference something that is 'Out of scope'. When you use a subquery in the select statement the subqueries tables are only accessible for that item. That access does not carry over to other items in the select statement. So, this should work for you (if it's ugly and it works, it's not ugly).
SELECT ID,
Name,
(SELECT Email FROM Emails WHERE Emails.ID = d.ID) AS Email,
(SELECT Email FROM Emails WHERE Emails.ID = d.ID)
+ ' testing ' AS Test,
Address
FROM data d
My SQL skills aren't great hence the post.
I'm trying to get all the contact names based on a company out.
For example I have two statements:
Select Id, CompanyName, Address From Clients
Select ClientId, ContactName From Contacts
You may have many contacts to a single client
Result: (I need all the contact names in a single column)
ContactName Company Address
----------------------------------------
Johh, Steve 123 Comp 12345 Address
David,Mike, Sarah 44 Comp 111 Address
A working example would be very much appreciated.
SELECT DISTINCT (
SELECT ISNULL(ct.ContactName, '') + ', '
FROM dbo.Clients cl JOIN dbo.Contacts ct ON cl.Id = ct.ClientId
WHERE cl.ID = cl2.Id
FOR XML PATH('')) AS ContactName, CAST(cl2.Id AS nvarchar(7)) + ' ' + cl2.CompanyName AS Company, Address
FROM dbo.Clients cl2
ORDER BY 2
Demo on SQLFiddle
Firstly build all the Contact Names for a Company into a Single Column. Assuming the database to be SQL Server, I'm using a Common Table Expression to store the single column contact list. Once the CTE is built, join it with the Clients table to get the ContactNames. FOR XML is used to concatenate rows.
WITH CTEContactList(ClientID,ContactNames)
AS
(
SELECT c1.ClientID,
Names = SUBSTRING(( SELECT ', ' + c2.ContactName
FROM Contacts c2
WHERE c1.ClientID = c2.ClientID
FOR XML PATH ('')),3,8000 ))
FROM Contacts c1
GROUP BY c1.ClientID
)
SELECT
cl.ID,
cl.CompanyName,
cl.Address,
ctelist.ContactNames
FROM Clients cl
INNER JOIN CTEContactList ctelist
ON cl.ID = cteList.ClientID
Sounds like you need to do a table join.
Example: two tables here
1. Person
2. Orders
Query:
SELECT
Persons.LastName, Persons.FirstName, Orders.OrderNo
FROM Persons
INNER JOIN Orders ON Persons.P_Id = Orders.P_Id
ORDER BY Persons.LastName
You didn't specify your DBMS, so I'm assuming PostgreSQL:
select string_agg(ct.contactName, ', '), cl.companyname, cl.address
from contacts ct
join clients cl on cl.id = ct.clientId
group by cl.companyname, cl.address
I have a field called PropertyValue in the UserProfile table that can contain information for address, phone number, first name, last name, user name, city, etc... each record in this table is associated to a user by UserId, it is also associated to a ProfilePropertyDefinition which contains the definition for each of the properties (ie. PropertyName).
Through this relationship I can get all of the property values along with their property names. What I would like to do it to extract the data from these two columns (PropertyValue, PropertyName) and create a table similar to this:
First Name | Last Name | Email | Phone | City | Country
-------------------------------------------------------
| | | | |
So, I wanted to know if I can use a SQL statement to do this, here's my go at it:
SELECT FirstName = (SELECT PropertyValue FROM UserProfile WHERE PropertyDefinitionID = (SELECT PropertyDefinitionID WHERE PropertyName = 'first name')),
LastName = (SELECT PropertyValue FROM UserProfile WHERE PropertyDefinitionID = (SELECT PropertyDefinitionID WHERE PropertyName = 'last name')),
Email = (SELECT PropertyValue FROM UserProfile WHERE PropertyDefinitionID = (SELECT PropertyDefinitionID WHERE PropertyName = 'email'))
But that didn't work and something seems really weird about it... Anyone know how to take one column and display it's values in several different columns?
SELECT fn.PropertyValue FirstName,
ln.PropertyValue LastName,
etc...
From UserProfile fN
Join UserProfile lN
On fN.PropertyName = 'first name'
And ln.PropertyName = 'last name'
And fn.user = ln.user
Join UserProfile eM
On fN.PropertyName = 'first name'
And eM.PropertyName = 'email'
And eM.user = fn.user
(
Personally, I would stop right now and consider how bad this design will be for performance. This is in general a very poor technique to use to store this type of data. If you have 20 proerties you want to display you will have to join (And left join at that as you can't guarantee each property will be represented) to this table 20 times. Further, if this is central to your data structure (As it sounds like it is from the type of data you seem to be storing) virtually every query will need to do something simliar and performance will be atrocious. There are time when this is the best model (when you have no way of knowing in advance what properties will need to be stored), but most of the time, it's use is a sign of a bad design.
http://en.wikipedia.org/wiki/Entity-Attribute-Value_model
I guess you could do a select from the same table multiple times.
Let say tA is the name table with UserProfileID,PropertyDefinition and PropertyValue
You could do
select
t1.PropertyValue as FirstName,
t2.PropertyValue as LastName,
...
FROM
tA as t1, tA as t2, ....
WHERE
t1.PropertyDefinition Like 'FirstName' AND
t2.PropertyDefinition Like 'LastName' AND
....
AND
t1.UserId = #user AND
t2.UserID = #user ....
Not ideal, but it would work
You need to join the tables many times over (as many times as you have fields):
SELECT UPFN.PropertyValue AS FirstName, UPLN.PropertyValue AS LastName, ...
FROM UserProfile UPFN
INNER JOIN ProfilePropertyDefinition PPDFN ON PPDFN.PropertyDefinitionID = UPFN.PropertyDefinitionID AND PPDFN.PropertyName = 'first name'
INNER JOIN UserProfile UPLN ON UPLN.id = UPFN.id
INNER JOIN ProfilePropertyDefinition PPDLN ON PPDLN.PropertyDefinitionID = UPLN.PropertyDefinitionID AND PPDLN.PropertyName = 'last name'
...
Note that this relies on their being some ID field in the UserProfile that you can use to tie all the rows for the same user together.
Assuming schema like
UserProfile#
{userid,
ProfileName,
propertyValue
}
You would want to do
SELECT
FirstName.PropertyValue FirstNAme,
LastName.PropertyValue LastName,
FROM
users
JOIN (USERPROFILE) FirstName ON
FirstName.userid = users.userid
and PropertName ='FirstName'
JOIN (USERPROFILE) LastName ON
LastName.userid = users.userid
and PropertName ='LastName'
I would write the query like this:
Select
aa.userId,
Coalesce(Max(Case when PropertyName = 'First Name' then PropertyValue else '' end),'') as FirstName,
and so on
from
UserTable as aa
left join
UserProfile as bb
on
aa.UserId = bb.UserId
left join
ProfilePropertyDefinition as cc
on bb.PropertyDefinitionId = cc.PropertdefinitionId
group by
aa.UserId
I would need to know more about your table sturtures and what you are trying to achomplish but an option may be to create a SQL Scalar Function to retieve the values of the properties. I am making some assumptions on table names and database setup but try this on...
CREATE FUNCTION [dbo].[UserProperty]
(
#UserProfileID UNIQUEIDENTIFIER, #Property VARCHAR(200)
)
RETURNS VARCHAR(max)
AS
BEGIN
-- Declare the return variable here
DECLARE #Value AS VARCHAR(MAX)
SELECT #Value = PropertyValue FROM UserProfile up INNER JOIN PropertyDefinitions pd ON
up.PropertyDefinitionID = pd.PropertyDefinitionID
WHERE pd.PropertyName = #Property AND up.UserProfileID=#UserProfileID
RETURN ISNULL(#Value,'')
END
SELECT
[dbo].[UserProperty](UserProfileID, 'first name') AS [First Name],
[dbo].[UserProperty](UserProfileID, 'last name') AS [Last Name],
[dbo].[UserProperty](UserProfileID, 'email') AS [Email]
FROM
[Users]