Question

I have a table called service entry which has a field called part description, Sample data is as follows:

**dbo.ServiceEntry**
ID      PartDescription
1200  60009 ~ Slide Error ~ L 0 ~ P 0 | 60011 ~ RV loader - Pick/Place Homing Error ~ L 0 ~ P 0 

I then have a table called ServiceEntryPart which has a 1 to many relationship, one service entry can have multiple parts in it, hence the service entry part table

**dbo.ServiceEntryPart**
ID  ServiceEntry   PartID   OldPartID
1    1200          5000     60009
2    1200          5500     60011


**dbo.Part**
ID     Description                           OldPartID
5000   New Slide Description                 60009
5500   Xyz                                   60011

Im trying to write a script to update the partdescription column in the ServiceEntry Table so the expected results will look like following with the new part id. so its basically just replacing the old part ids with the new ones

OLD OUTPUT

60009 ~ Slide Error ~ L 0 ~ P 0 | 60011 ~ RV loader - Pick/Place Homing Error ~ L 0 ~ P 0

NEW OUTPUT

5000 ~ New Slide Description ~ L 0 ~ P 0 | 5500 ~ Xyz ~ L 0 ~ P 0

I need some help with the script.query to update this fields with the new part id if present:

 1. Get the existing field
 DECLARE @PartDescription VARCHAR(8000)
 SELECT @PartDescription =  PartDescription FROM
 ServiceEntry

 2. UPDATE ServiceEntry
    SET PartDescription

Answer 1

DECLARE @ServiceEntry TABLE(
        ID INT,
        PARTDescription VARCHAR(MAX)
)

DECLARE @ServiceEntryPart TABLE(
        ID   INT,
        ServiceEntry   INT,
        PartID INT,
        OldPartID INT
)

DECLARE @Part TABLE(
        ID  INT,
        [Description]  VARCHAR(50),
        OldPartID VARCHAR(50)
)

INSERT INTO @ServiceEntry SELECT 1200, ''

INSERT INTO @ServiceEntryPart SELECT 1, 1200, 5000, 60009
INSERT INTO @ServiceEntryPart SELECT 2, 1200, 5500, 60011

INSERT INTO @Part SELECT 5000, 'New Slide Description', 60009
INSERT INTO @Part SELECT 5500, 'Xyz', 60011

UPDATE @ServiceEntry
SET PARTDescription = 
        ( 
            SELECT  CAST(p.ID AS VARCHAR)+ ' ~ ' + p.Description + ' ~ L 0 ~ P 0 | '
            FROM    @Part p INNER JOIN  
                    @ServiceEntryPart ep ON p.ID = ep.PartID
            WHERE   ep.ServiceEntry = se.ID
            FOR XML PATH('')
        ) 
FROM    @ServiceEntry se

UPDATE @ServiceEntry
SET PARTDescription = LEFT(PARTDescription, LEN(PARTDescription) -2)

SELECT *
FROM @ServiceEntry