Help in writing query

Question

There are 2 tables
EMP Table
empno salary grade
100 1000
200 2000
300 2200
400 3500
500 3700
600 5200
700 4000
800 6500
Grade table
grade losal hisal
A 0 1000
B 1001 2000
C 2500 3500
D 4000 5000
E 5500 6500
Now query's output should like
100 1000 A
200 2000 B
300 2200 B
400 3500 C
500 3700 C
600 5200 D
700 4000 D
800 6500 E
If the salary is not in given range then preceding grade should be displayed.
example is empno with 300
After retrieving the query results, Update emp table with grades
Thanks in advance
Vinay

Answer 1

Hi,
this should work
SQL> update EMP a
SQL> set a.grade = (select grade from grade b where a.salary between b.losal and b.hisal);
SQL> select * from EMP;
EMPNO SALARY GRADE
100 1000 A
200 2000 B
300 2200
400 3500 C
500 3700
600 5200
700 4000 D
800 6500 E
SQL> update EMP a
SQL> set a.grade = (select max(grade) from grade b where a.salary > b.hisal )
SQL> where a.grade is null;
SQL> select * from EMP;
EMPNO SALARY GRADE
100 1000 A
200 2000 B
300 2200 B
400 3500 C
500 3700 C
600 5200 D
700 4000 D
800 6500 E
null