SQL Server内置函数名称

Question

I'm trying to update sum columns data like this:

update
   tableName
set
   score = myFunction(tableName.id)

In other hands I want to have a table like this:

column1   |     column2
------------------------------    
  id1     |  myFunction(id1)
  id2     |  myFunction(id2) 
  id3     |  myFunction(id3)
  id4     |  myFunction(id4)

I defined myFunction as a scalar-valued functions. I also tried it as a table-valued function but I see this error in SQL Server 2012:

Msg 195, Level 15, State 10, Line 14
'myFunction' is not a recognized built-in function name.

Please help me

Answer 1

Try using the full name of the function, including the database and schema name:

update
   tableName
set
   score = <database>.<schema>.myFunction(tableName.id)

I think only the schema name is needed, but I've gotten in the habit of putting both.

The documentation explains that at least the two part name is needed. If you don't know what schema are, then the following will probably work:

update
   tableName
set
   score = dbo.myFunction(tableName.id)