Union dates and count(*) from different tables

Question

Hope you can help. Using Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
I have tables called apples, oranges, and pears. I want to get a count of all apples, oranges, pears and a total for a date range in one query statement. Any ideas?
for apples the sql is select count(apple_types) from apples where apple_date > TO_DATE('2012-01-01')
for oranges the sql is select count(orange_types) from orange where orange_date > TO_DATE('2012-01-01')
for pears the sql is s elect count(pear_types) from pears where pears_date > TO_DATE('2012-01-01')
EXAMPLE DATA
Data for apples
2012-01-01 4
2012-04-23 1
Data for oranges
2012-02-13 5
2012-03-11 2
Data for pears
2012-01-01 11
I would like the output to be
date count(apple_types) count(orange_types) count(pear_types) total
2012-01-01 4 0 11 15
2012-02-13 0 5 0 5
2012-03-11 0 2 0 2
2012-04-23 1 0 0 1

Answer 1

here is one with pivot
WITH apples
     AS (SELECT TO_DATE ('2012-01-01', 'yyyy-mm-dd') dt, 4 cnt FROM DUAL
         UNION ALL
         SELECT TO_DATE ('2012-04-23', 'yyyy-mm-dd') dt, 1 cnt FROM DUAL),
     oranges
     AS (SELECT TO_DATE ('2012-01-13', 'yyyy-mm-dd') dt, 5 cnt FROM DUAL
         UNION ALL
         SELECT TO_DATE ('2012-03-11', 'yyyy-mm-dd') dt, 2 cnt FROM DUAL),
     pears
     AS (SELECT TO_DATE ('2012-01-01', 'yyyy-mm-dd') dt, 11 cnt FROM DUAL),
     t
     AS (  SELECT dt, SUM (cnt) cnt, 'apples' fruit
             FROM apples
         GROUP BY dt
         UNION ALL
           SELECT dt, SUM (cnt), 'oranges'
             FROM oranges
         GROUP BY dt
         UNION ALL
           SELECT dt, SUM (cnt), 'pears'
             FROM pears
         GROUP BY dt)
  SELECT dt,
         NVL (apples, 0),
         NVL (oranges, 0),
         NVL (pears, 0),
         NVL (apples, 0) + NVL (oranges, 0) + NVL (pears, 0) total
    FROM t PIVOT (MAX (cnt)
           FOR fruit
           IN ('apples' AS apples, 'oranges' AS oranges, 'pears' AS pears))
ORDER BY 1
DT     NVL(APPLES,0)     NVL(ORANGES,0)     NVL(PEARS,0)     TOTAL
1/1/2012     4     0     11     15
1/13/2012     0     5     0     5
3/11/2012     0     2     0     2
4/23/2012     1     0     0     1