Question

I want to query two tables as below to get the rows in the new table that does not already have a name or code entry in the current table.

table current

name           code
japan          233
india          65
england        44


table new

name           code
japan          233
india          65
england-main   44
japan          2331
india          652
usa            1

In this exampe it should return

name         code
usa          1

what sql query will archive thisenter code here

Answer 1

SELECT name, code 
FROM new n
WHERE NOT EXISTS(SELECT * FROM current c 
                 WHERE c.name = n.name OR c.code = n.code)