MSSQL – JOIN ON null values
SELECT tbl_a.*, tbl_b.* FROM tbl_a INNER JOIN tbl_b ON tbl_a.name = tbl_b.name OR ( tbl_a.name IS NULL AND tbl_b.name IS NULL )
SELECT tbl_a.*, tbl_b.* FROM tbl_a INNER JOIN tbl_b ON tbl_a.name = tbl_b.name OR ( tbl_a.name IS NULL AND tbl_b.name IS NULL )