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SQL Server - Spaces in combined Computed Column

Posted on 2013-05-30
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Last Modified: 2013-05-31
Hey Experts
 I have this as a computed column.

 From the computed column i use 2 different triggers to update seperate tables (Segment & Parcel) with this value
Problem is it looks like i have extras spaces on the end of the computed column in my tables i would like to deleted them.
(ltrim((((((rtrim(isnull([Prefix_Full],''))+' ')+rtrim(isnull([Street_Name],'')))+' ')+rtrim(isnull([Suffix_Full],'')))+' ')+rtrim(isnull([Suffix_Direction],''))))

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Is some cases i have 2 spaces and in some case i have 1.
How is the easiest way to trim these?
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Question by:PtboGiser
9 Comments
 
LVL 23

Expert Comment

by:nemws1
ID: 39208948
Can you just call RTRIM on the whole thing?
(rtrim(ltrim((((((rtrim(isnull([Prefix_Full],''))+' ')+rtrim(isnull([Street_Name],'')))+' ')+rtrim(isnull([Suffix_Full],'')))+' ')+rtrim(isnull([Suffix_Direction],'')))))

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Author Comment

by:PtboGiser
ID: 39208956
I was trying but couldnt get the right syntax
0
 
LVL 23

Expert Comment

by:nemws1
ID: 39208966
Are you getting a error on this? (It looks long and messy, so I didn't try to come up with an example)
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Author Comment

by:PtboGiser
ID: 39208978
+rtrim(isnull([Suffix_Direction],''))))RTRIM i was adding this to the end, and i get

Error ;
'Street' table
- Unable to modify table.  
Incorrect syntax near 'RTRIM'.

If i add a Bracket at the end Like so
+rtrim(isnull([Suffix_Direction],''))))RTRIM) and the Start of it all i get
Error
Validating Syntax
RTRIM.PNG
0
 

Author Comment

by:PtboGiser
ID: 39209019
((ltrim((((((rtrim(isnull([Prefix_Full],''))+' ')+rtrim(isnull([Street_Name],'')))+' ')+rtrim(isnull([Suffix_Full],'')))+' ')+rtrim(isnull([Suffix_Direction],''))))Rtrim[Street_Full_Name])

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Playing with stuff like this
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LVL 40

Assisted Solution

by:Sharath
Sharath earned 100 total points
ID: 39209083
try this.
rtrim(isnull(Prefix_Full + ' ','') + isnull(Street_Name + ' ','') + isnull(Suffix_Full + ' ','') + isnull(Suffix_Direction,''))

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0
 
LVL 23

Expert Comment

by:nemws1
ID: 39209251
To go off of what Sharath_123 posted, I would do something like this to make sure of every field

CREATE TABLE whatever ( ....
   ....
   COMPUTED_COLUMN AS (ISNULL(LTRIM(RTRIM(Prefix_Full)) + ' ','')
      + ISNULL(LTRIM(RTRIM(Street_Name)) + ' ','')
      + ISNULL(LTRIM(RTRIM(Suffix_Full)) + ' ','')
      + ISNULL(LTRIM(RTRIM(Suffix_Direction)),'')
   )
)

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LVL 69

Accepted Solution

by:
Scott Pletcher earned 400 total points
ID: 39209327
You can't alter a computed column definition, you have to drop and re-add it:

ALTER TABLE dbo.tablename
DROP COLUMN <computed_column_name>

ALTER TABLE dbo.tablename
ADD <computed_column_name> AS CAST( LTRIM(RTRIM(
    ISNULL([Prefix_Full] + SPACE(1), '') +
    ISNULL([Street_Name] + SPACE(1), '') +
    ISNULL([Suffix_Full] + SPACE(1), '') +
    ISNULL([Suffix_Direction], '') )) AS varchar(nnn)) --<<-- nnn = desired total column length
0
 

Author Closing Comment

by:PtboGiser
ID: 39210656
Thanks as always
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