sql how to combine three queries from two tables into one query

Question

i have the following two tables:

Table1

id  name
---------
A3  B2
A3  B400
A5  B100
A7  B200
A8  B6
A8  B2
A8  B3

and

Answer 1

Try with UNION DISTINCT like:

SELECT DISTINCT t1.id as ID,
        t2.company as Company,
        'FOUND' AS status
 FROM   table1 t1
        JOIN table2 t2
          ON t1.id = t2.id
group by ID

union distinct

SELECT DISTINCT t2.id as ID,
        t2.company as Company,
        'FOUND' AS status
 FROM   table1 t1
        JOIN table2 t2
          ON t1.name = t2.name
group by ID

union distinct

SELECT t1.name as ID,
        t1.name as Company,
        'NOT FOUND' AS status
 FROM   table1 t1
  WHERE  t1.name NOT IN (SELECT t2.name
                                FROM   table2 t2)
GROUP BY ID