Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 358
  • Last Modified:

Appending/removing values with comma (,)

I have a field called, DevPref, on a table (Admin_Priv), and the field has values like below:

default,splits,installments
default,splits
default,splits
default,installments,splits
NULL

I need to update the field with adding and removing "sortasc" or "sortdesc".

for instance,

adding "sortasc" will be:  i.e. default,splits,installments,sortasc
updating this one will be: default,splits,installments,sortdesc

for the NULL row
it would simply be:
                       sortasc
updating this one will be:
                       sortdesc

When I append "sortasc" or "sortdesc" to the tail so that the existing values (i.e. default,splits,installments) won't be impacted.

0
ethanjohnsons
Asked:
ethanjohnsons
  • 2
  • 2
2 Solutions
 
rafranciscoCommented:
Your update statement will look like this:

UPDATE Admin_Priv
SET DevPref = ISNULL(DevPref + ',', '') + 'sortasc'

To update sortasc to sortdesc:

UPDATE Admin_Priv
SET DevPref = REPLACE(DevPref, 'sortasc', 'sortdesc')
0
 
imrancsCommented:
First create this function
---------------


--This UDF returns string values

CREATE FUNCTION dbo.GetValuesFromListS
(
      @ValuesList varchar(8000)
)
RETURNS
@ParsedList table
(
      Value Varchar(1000)
)
AS
BEGIN
      DECLARE @Value varchar(1000), @Pos int

      SET @ValuesList = LTRIM(RTRIM(@ValuesList))+ ','
      SET @Pos = CHARINDEX(',', @ValuesList, 1)

      IF REPLACE(@ValuesList, ',', '') <> ''
      BEGIN
            WHILE @Pos > 0
            BEGIN
                  SET @Value = LTRIM(RTRIM(LEFT(@ValuesList, @Pos - 1)))
                  IF @Value <> ''
                  BEGIN
                        INSERT INTO @ParsedList (Value)
                        VALUES (@Value) --Use Appropriate conversion
                  END
                  SET @ValuesList = RIGHT(@ValuesList, LEN(@ValuesList) - @Pos)
                  SET @Pos = CHARINDEX(',', @ValuesList, 1)

            END
      END      
      RETURN
END
---------------

1. Append a value
Declare @NewValue Varchar(100)
Select @NewValue = 'sortasc'

Update Admin_Priv Set DevPref = IsNull(DevPref, '') = @NewValue
Where ID_Col = <SomeValue>

2. Removing a value
Declare @ValueToRemove Varchar(100)
Declare @OldValues Varchar(1000)
Declare @NewValues Varchar(1000)

Select @ValueToRemove = 'sorasc'
Select @OldValue = ''
Select @NewValue = ''

Select @OldValues = DevPref From Admin_Priv Where ID_Col = <SomeValue>
Select @NewValues = Coalesce(@NewValues, '') + Value + ',' From dbo.GetValuesFromListS(@OldValues) Where Value <> @ValueToRemove

If @NewValues <> ''
  Select @NewValues = Left(@NewValues, Len(@NewValues)-1)

Update Admin_Priv Set DevPref =  @NewValues  
Where ID_Col = <SomeValue>


Imran
0
 
ethanjohnsonsAuthor Commented:
UPDATE Admin_Priv
SET DevPref = ISNULL(DevPref + ',', '') + 'sortasc'

To update sortasc to sortdesc:

UPDATE Admin_Priv
SET DevPref = REPLACE(DevPref, 'sortasc', 'sortdesc')

This works fine, but I need to make sure that ONLY one of 'sortasc' or 'sortdesc' is added.


UPDATE Admin_Priv
SET DevPref = ISNULL(DevPref + ',', '') + 'sortasc'

adds mutiple of 'sortasc', so, if 'sortasc' or 'sortdesc' exists, it has to skip adding.
0
 
rafranciscoCommented:
Just put a WHERE clause to make sure that sortasc is not in the string yet:

UPDATE Admin_Priv
SET DevPref = ISNULL(DevPref + ',', '') + 'sortasc'
WHERE DevPref IS NOT LIKE '%sortasc%'
0
 
ethanjohnsonsAuthor Commented:
that will work.
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now