sql server for json path

go

DROP TABLE IF EXISTS #tabStudent;
DROP TABLE IF EXISTS #tabClass;

go

CREATE TABLE #tabClass
(
   ClassGuid   uniqueIdentifier  not null  default newid(),
   ClassName   nvarchar(32)      not null
);

CREATE TABLE #tabStudent
(
   StudentGuid   uniqueIdentifier  not null  default newid(),
   StudentName   nvarchar(32)      not null,
   ClassGuid     uniqueIdentifier      null   -- Foreign key.
);

go

INSERT INTO #tabClass
      (ClassGuid, ClassName)
   VALUES
      ('DE807673-ECFC-4850-930D-A86F921DE438', 'Algebra Math'),
      ('C55C6819-E744-4797-AC56-FF8A729A7F5C', 'Calculus Math'),
      ('98509D36-A2C8-4A65-A310-E744F5621C83', 'Art Painting')
;

INSERT INTO #tabStudent
      (StudentName, ClassGuid)
   VALUES
      ('Alice Apple', 'DE807673-ECFC-4850-930D-A86F921DE438'),
      ('Alice Apple', 'C55C6819-E744-4797-AC56-FF8A729A7F5C'),
      ('Betty Boot' , 'C55C6819-E744-4797-AC56-FF8A729A7F5C'),
      ('Betty Boot' , '98509D36-A2C8-4A65-A310-E744F5621C83'),
      ('Carla Cap'  , null)
;

go

SELECT
      c.ClassName,
      s.StudentName
   from
                       #tabClass   as c
      RIGHT OUTER JOIN #tabStudent as s ON s.ClassGuid = c.ClassGuid
   --where
   --   c.ClassName LIKE '%Math%'
   order by
      c.ClassName,
      s.StudentName
   FOR
      JSON AUTO
      --, INCLUDE_NULL_VALUES
;

go

DROP TABLE IF EXISTS #tabStudent;
DROP TABLE IF EXISTS #tabClass;

go
SELECT name, surname  
FROM emp  
FOR JSON AUTO;