SQL Server Compact更新查询中的错误

Question

I tried this query

UPDATE       runnigorder
SET                orderid_new = (CAST( r.orderid as nvarchar(100) 
FROM runnigorder AS r))
WHERE        (runnigorder.dummyId = r.dummyId)

but its giving me an error that unable to parse query text.

please help me out from this.My Sql server compact version is 4.0.

this is my table

Answer 1

Your query have some errors, try that

UPDATE r
SET r.orderid_new = CAST(r.orderid as nvarchar(100))
FROM runnigorder AS r
WHERE r.dummyId = r.dummyId

This will tranfer the data from the column orderid to orderid_new is that what ou want?

There was syntax and parenteses misplaced