Query to change the values of the column? - sql

Question

I have a table like this which contains a column number Order
FunctionID Name ParentFunctionID OrderNo Enabled ControllerName ActionName
1 Nikhil 0 10 1 nik
2 Sahil 0 20 1 sah
3 With 2 10 1 sah Withsnew
4 User 2 20 1 sah users
5 Pen 2 10 0 sah pend
44 User Summary 2 210 1 sah usersummary
45 Summary 2 230 1 sah summary
46 Hourly 1 231 1 nik hourly
47 Code 1 232 1 nik code
I want the Table like
FunctionID Name ParentFunctionID OrderNo Enabled ControllerName ActionName
1 Nikhil 0 1 1 nik
2 Sahil 0 2 1 sah
3 With 2 1 1 sah Withsnew
4 User 2 2 1 sah users
5 Pen 2 3 0 sah pend
44 User Summary 2 4 1 sah usersummary
45 Summary 2 5 1 sah summary
46 Hourly 1 1 1 nik hourly
47 Code 1 2 1 nik code

Answer 1

USE THE ROWNUM FEATURE:
SELECT
FunctionID ,
Name ,
ParentFunctionID,
ROWNUM AS ORDER_NO,
Enabled,
ControllerName ,
ActionName
FROM TABLE NAME;
If you want rownumbers to reset based on particular conditions, use PARTITION along with ROW_NUMBER AS:
SELECT
FunctionID ,
Name ,
ParentFunctionID,
ROW_NUMBER() OVER (PARTITION BY ParentFunctionID ORDER BY FunctionID ) AS ORDER_NO,
Enabled,
ControllerName ,
ActionName
FROM TABLE NAME;

Answer 2

you can use ROW_NUMBER and partition by ParentFunctionID just like this
SELECT FunctionID, Name, ParentFunctionID
, ROW_NUMBER() OVER(PARTITION BY ParentFunctionID ORDER BY FunctionID) OrderNo
, [Enabled], ControllerName, ActionName
FROM TABLENAME
this will return the resultset if you want to update you can modify the script.
I hope this is helpful.

Answer 3

You can use ROW_NUMBER (Transact-SQL) to enumerate your rows partitioned by ParentFunctionID ordered by FunctionID to get the result you want.
SQL Fiddle
MS SQL Server 2012 Schema Setup:
create table YourTable
(
FunctionID int,
Name varchar(20),
ParentFunctionID int,
OrderNo int,
Enabled bit,
ControllerName varchar(20),
ActionName varchar(20)
)
go
insert into YourTable values
(1 , 'Nikhil ', 0, 10 , 1, 'nik', ' '),
(2 , 'Sahil ', 0, 20 , 1, 'sah', ' '),
(3 , 'With ', 2, 10 , 1, 'sah', 'Withsnew '),
(4 , 'User ', 2, 20 , 1, 'sah', 'users '),
(5 , 'Pen ', 2, 10 , 0, 'sah', 'pend '),
(44, 'User Summary', 2, 210, 1, 'sah', 'usersummary'),
(45, 'Summary ', 2, 230, 1, 'sah', 'summary '),
(46, 'Hourly ', 1, 231, 1, 'nik', 'hourly '),
(47, 'Code ', 1, 232, 1, 'nik', 'code ')
Query 1:
with C as
(
select OrderNo,
row_number() over(partition by ParentFunctionID order by FunctionID) as rn
from YourTable
)
update C
set OrderNo = rn
select *
from YourTable
Results:
| FUNCTIONID | NAME | PARENTFUNCTIONID | ORDERNO | ENABLED | CONTROLLERNAME | ACTIONNAME |
|------------|--------------|------------------|---------|---------|----------------|-------------|
| 1 | Nikhil | 0 | 1 | 1 | nik | |
| 2 | Sahil | 0 | 2 | 1 | sah | |
| 3 | With | 2 | 1 | 1 | sah | Withsnew |
| 4 | User | 2 | 2 | 1 | sah | users |
| 5 | Pen | 2 | 3 | 0 | sah | pend |
| 44 | User Summary | 2 | 4 | 1 | sah | usersummary |
| 45 | Summary | 2 | 5 | 1 | sah | summary |
| 46 | Hourly | 1 | 1 | 1 | nik | hourly |
| 47 | Code | 1 | 2 | 1 | nik | code |