Bind variable for date type

Question

Hello
I have a question about bind variable.
I have a simple query which is a stand alone SQL.
Its simple select
select a, b , c from table1, table 2
where table1.g1 = table 2.p1
and  table1.pnumber like  :var1 || '%'
and table2.check_date between :var2 and :var3
This SQL is embedded in another piece of code.
I have table1.pnumber like  :var1 || '%'
So even when I do not pass any value for var1, it will run fine because I concatenate a % with it.
But  my question is how can I do the same for "table2.check_date like :var2 "
I can not append % with it because then it throws an error.
How can I modify my SQL so that I can run it without giving any value for var2 and var3.
I do not want to use an or condition in which I give a default value of date.
Is there any way to modify the SQL so that I can run it without giving a value for var2 and var3
Thanks

Answer 1

var var2 varchar2(11)
var var3 varchar2(11)
EXEC :VAR2 := '01-JUN-1981'
PL/SQL procedure successfully completed.
EXEC :VAR3 := '30-JUN-1981'
PL/SQL procedure successfully completed.
select * from emp
     where nvl2(:var2,hiredate,to_date('01-JAN-2000','DD-MON-YYYY')) between
     nvl(to_date(:var2,'DD-MON-YYYY'),to_date('01-JAN-2000','DD-MON-YYYY'))
     AND
     nvl(to_date(:var3,'DD-MON-YYYY'),to_date('01-JAN-2000','DD-MON-YYYY'))
EMPNO ENAME      JOB             MGR HIREDATE        SAL      COMM    DEPTNO
7782 CLARK      MANAGER        7839 09-JUN-81      2450       100        10
EXEC :VAR2 := NULL
PL/SQL procedure successfully completed.
EXEC :VAR3 := NULL
PL/SQL procedure successfully completed.
EMPNO ENAME      JOB             MGR HIREDATE        SAL      COMM    DEPTNO
7782 CLARK      MANAGER        7839 09-JUN-81      2450       100        10
7839 KING         PRESIDENT           17-NOV-81      5000       100        10
7934 MILLER     CLERK          7782 23-JAN-82      1300       100        10
7566 JONES      MANAGER        7839 02-APR-81                            20
7902 FORD       ANALYST        7566 03-DEC-81                            20
7876 ADAMS     CLERK          7788 12-JAN-83                            20
7369 SMITH      CLERK          7902 17-DEC-80                            20
7788 SCOTT      ANALYST        7566 09-DEC-82                            20
7521 WARD       SALESMAN       7698 22-FEB-81                            30
7844 TURNER     SALESMAN       7698 08-SEP-81                            30
7499 ALLEN      SALESMAN       7698 20-FEB-81                            30
7900 JAMES      CLERK          7698 03-DEC-81                            30
7698 BLAKE      SALESMAN       7839 01-MAY-81                            30
7654 MARTIN     SALESMAN       7698 28-SEP-81                            30
Message was edited by: Priyasagi