使用VB6和Oracle

Question

我有使用查詢 SELECT TRUNC的記錄（createdon， 'HH'）CREATEDON，COUNT（*）FROM WHERE LABSTATUS = 1 AND CREATEDON> = TO_DATE（'01/07/2010 10 '，'DD/MM/YYYY hh'） GROUP BY trunc（createdon，'hh'） 以小時爲單位。我需要將計數值放置在網格中的相應時間列中。 我該怎麼辦？任何想法

Answer 1

你可以這樣說：

時間都在列

SELECT TRUNC(createdon,'hh'), SUM(CASE WHEN hh=1 THEN 1 ELSE 0) h1, 
           SUM(CASE WHEN hh=2 THEN 1 ELSE 0) h2 ..... 
FROM TABLle1, 
(SELECT 1 AS hh FROM dual 
UNION 
SELECT 2 AS hh FROM dual 
UNION 
SELECT 3 AS hh FROM dual 
.... 
) hours 
WHERE LABSTATUS=1 AND CREATEDON >=TO_DATE('01/07/2010 10','DD/MM/YYYY hh') AND 
TRUNC(createdon,'hh')= hours.hh 
GROUP BY TRUNC(createdon,'hh') 

營業時間爲行：

SELECT hours.hh, SUM(CASE WHEN TRUNC(createdon,'hh')= hours.hh THEN 1 ELSE 0 END) hh,         
    FROM TABLle1, 
    (SELECT 1 AS hh FROM dual 
    UNION 
    SELECT 2 AS hh FROM dual 
    UNION 
    SELECT 3 AS hh FROM dual 
    .... 
    ) hours 
    WHERE LABSTATUS=1 AND CREATEDON >=TO_DATE('01/07/2010 10','DD/MM/YYYY hh')  
    GROUP BY hours.hh 

這個查詢將導致這樣

• row 1 12

  行2 0

  排3 4

...