使用SQL實現特殊查詢（1）

SQL> select * from t;

A B

----------- ---------------------------------------

2006-2-1 1

2006-2-2 1

2006-2-3 1

2006-2-4 1

2006-2-5 1

2006-2-6 1

2006-2-7 1

2006-2-8 1

2006-2-9 1

2006-2-10 1

10 rows selected

SQL> desc t;

Name Type Nullable Default Comments

---- ------- -------- ------- --------

A DATE Y

B INTEGER Y

SQL>

DT NVL(B.B,0)

----------- ----------

2006-2-1 1

2006-2-2 1

2006-2-3 1

2006-2-4 1

2006-2-5 1

2006-2-6 1

2006-2-7 1

2006-2-8 1

2006-2-9 1

2006-2-10 1

2006-2-17 0

2006-2-18 0

2006-2-24 0

2006-2-13 0

2006-2-11 0

2006-2-12 0

2006-2-20 0

2006-2-22 0

2006-2-21 0

2006-2-16 0

DT NVL(B.B,0)

----------- ----------

2006-2-28 0

2006-2-23 0

2006-2-26 0

2006-2-25 0

2006-2-14 0

2006-2-27 0

2006-2-15 0

2006-2-19 0

28 rows selected

select a.dt, nvl( b.b, 0 )

from ( select to_date( '2006-02-01','yyyy-mm-dd' ) + rownum -1 dt

from all_objects

where rownum <= last_day( to_date('2006-02-27','yyyy-mm-dd') ) - to_date(

'2006-02-01','yyyy-mm-dd' ) + 1 ) A,

t B

where a.dt = b.a (+)

/