Hi smile,
Please refer below query.
SQL
DECLARE @TestDemo AS TABLE(AdmissionNo VARCHAR(5), NetBal INT, Paid INT, RemBal INT)
INSERT INTO @TestDemo VALUES('R-01',700,400,300)
INSERT INTO @TestDemo VALUES('R-02',700,300	,400)
INSERT INTO @TestDemo VALUES('R-02',400,400,0)
INSERT INTO @TestDemo VALUES('R-03',700	,600 ,100)
INSERT INTO @TestDemo VALUES('R-04',700	,700,0)
INSERT INTO @TestDemo VALUES('R-05',700,700,0)
INSERT INTO @TestDemo VALUES('R-06',700,700,0)
SELECT * FROM @TestDemo
WHERE RemBal !=0 AND AdmissionNo NOT IN (SELECT AdmissionNo FROM @TestDemo WHERE RemBal = 0)
Screenshot
| AdmissionNo | NetBal | Paid | RemBal | 
| R-01 | 700 | 400 | 300 | 
| R-03 | 700 | 600 | 100 |