Add character to selected duplicate value in SQL - sql

Question

I need to add character / number to selected duplicate values.
This is what I need:
SELECT Name -- Here I need to add for example 1 if It have duplicates
-- If It is hard way to code, how to add 1 to all selected values?
FROM Example
WHERE Id BETWEEN 25 AND 285
If there are 2 equal names Peter It should select Peter and second Peter1
If there is no easy way to make It, how to add 1 to all selected lines? Should select Peter1 instead of Peter
I've tried this:
SELECT Name + ' 1' AS Name -- in this case selecting wrong column
FROM Example
WHERE Id BETWEEN 25 AND 285
EDIT
SELECT #cols += ([Name]) + ','
FROM (SELECT Name --I neeed to integrate It here
FROM FormFields
WHERE ID BETWEEN 50 AND 82
) a
If I use this:
SELECT #cols += ([Name]) + ',' -- here throws error
FROM (SELECT Name + CASE WHEN RowNum = 1 THEN '' ELSE CONVERT(NVARCHAR(100), RowNum-1) END AS [UpdatedName]
FROM (
SELECT Name AS Name,
ROW_NUMBER() OVER (PARTITION BY Name ORDER BY Name) AS "RowNum"
FROM FormFields
WHERE Id Between 50 And 82) x
) a
It throws error: Invalid column name 'Name'.
EDIT 2
It's different tests but some of them have the same criteria. That's why I need It to rename.

Answer 1

You can do this via getting the Row_Number and using a Case. Here's an example for SQL Server:
;With Cte As
(
Select Name, Row_Number() Over (Partition By Name Order By Name) RN
From Example
Where Id Between 25 And 285
)
Select Case When RN = 1 Then Name Else Name + Cast((RN - 1) As Varchar (3)) End As Name
From Cte

Answer 2

You could use the ROW_NUMBER function built into SQL server.
select Name + case when RowNum = 1 then '' else CONVERT(varchar(100), RowNum-1) end as "UpdatedName"
from (
select name as "Name",
ROW_NUMBER() over (partition by name order by name) as "RowNum"
from Example
Where Id Between 25 And 285) x
Please note that this still doesn't guarantee you unique names. Afterall, someone could already have a name of "MyName1", so if you had 2 people with names "MyName" you'd still get 2 "MyName1" with this select statement.

Answer 3

This is very unusual request, it looks like you are trying to "make car run with wheels on the roof" :)
The root problem is almost sure wrong database design... Pivot is usually used for data summaries. If you have in the same column "Peter" and "Peter" with different meanings, it looks that there is something wrong. Or do you need to differentiate both Peters for any other reason?
I do not understand what are you trying to achieve. If Peter is always Peter, and you just want to avoid duplicities, you can simply use "group by Name". But this is what pivot does automatically... If Peter and Peter have two different meanings (like Peter1 and Peter2), you should think about changing database structure, if possible.
Or try to explain more deeply what are you trying to achieve.
EDIT:
OK, now I understand the desired output. And what is the structure of your source data table(s)? From your schema it is clear that you need to make PIVOT columns based on
Testname+groupId
or
Testname+convert(varchar(100),groupId)
if groupId is number. That is your Peter1,Peter2 composition. It will create columns that you need. But I dont't know where testname and groupId are located in your datatables. Do test names correspond to column NAMES or to VALUES stored in DB? Is groupId something like TestId? Again column or value? Provide more info about source data structure, if you need more help, your problem is not so complicated.

Answer 4

Since the columns have group IDs, concatenate the Column name with an Underscore and GroupID as a key value and when you display it, strip the underscore and trailing characters.
Like This:
SELECT #cols += ([Name]) + ','
FROM (SELECT Name + '_' + CAST(GroupId AS varchar)
FROM FormFields
WHERE ID BETWEEN 50 AND 82
) a
I assume you are using this to build a dynamic SQL statement. I'm not sure what the schema of your FormFields Table is, but if it includes something like the test name you could append an AS [Name] + ' - ' +[TestName] to have the column header be something more useful. I would say try a PIVOT, but that could get pretty ungainly if the tests don't have the majority of the fields in common...
I also assume you are storing responses to these prompts in a table that looks something like this:
CREATE TABLE [Responses]
(
RespID int IDENTITY NOT NULL,
UserID int NOT NULL,
FieldID int NOT NULL,
RespVal int/varchar/whatever NOT NULL
)
Then perhaps you have a [Test] table with some test metadata that acts as the primary key for your GroupID Foreign key in your FormFields table.
In your example you show responses across all columns, but I'm not sure how that would work since (unless I'm missing something in your explanation and the inferences I've made to your design) one set of responses would only be populated for one of the groups per row, unless you are aggregating responses, but then by what criteria? Perhaps the rows correspond to respondents and all respondents are required to answer across all form types. In that case, your output would work as a PIVOT like this:
DECLARE #sql varchar(4000) = ''
DECLARE #colList varchar(1000)
DECLARE #selList varchar(1000)
;WITH NameBase
AS
(
SELECT t.Name [TestName], f.Name [FieldName], f.GroupId
FROM [FormFields] f
INNER JOIN [Tests] t ON f.GroupID = t.ID
)
SELECT #colList = COALESCE(#colList + ',','') + QUOTENAME([FieldName] + '_' + [GroupId])
, #selList = COALESCE(#selList + ',','') + QUOTENAME([FieldName] + '_' + [GroupId]) + ' AS ' + QUOTENAME([FieldName] + ' - ' + [TestName])
FROM NameBase
SELECT #sql = 'SELECT [UserName],' + #selList + ' FROM (
SELECT u.Name [UserName], f.Name + '_' + f.GroupId [FieldName], r.RespVal [Response]
FROM Responses r
INNER JOIN [TestUsers] u ON r.UserID = u.ID
INNER JOIN [FormFields] f ON r.FieldID = f.ID) t
PIVOT (MAX([Response]) FOR [FieldName] IN (' + #colList + ')) pvt'
EXECUTE(#sql);
I haven't tested that yet, but it should at least point you in the right direction. I'll try to build a SqlFiddle to test it in a little bit.