計數有狀態的FoxPro

我有一個表遵循計數有狀態的FoxPro

id name date 
1 a 08/09/2003 
2 b 02/03/2003 
3 c 10/08/2004 
4 c 25/08/2007 
5 a 01/01/2008

我想指望數據庫。與見下表與結果如下：

2003 = 2 
2004 = 1 
2007 = 0 because c has in 2004-year 
2008 = 0 because a has in 2003-year

來源

2010-09-21 maolddv

首先，獲取名稱和它出現在最早的一年：

select name, min(year(date)) as year from table 
group by name into cursor temp

然後從一年之內獲得數：

select count(table.name) 
from table join temp on table.name = temp.name 
and year(table.date) = temp.year

來源

2010-09-21 10:00:30 stuartd

非常感謝你。 – maolddv 2010-09-21 10:01:39

我可能正在解決一個不同的問題，但是這個代碼給出了在往年沒有出現的名字的每年的計數：

*-- Get the firstyear for each name 
Select Name, Min(Year(Date)) As firstyear ; 
    From table1; 
    Group By Name Into Cursor temp1 

*-- Get the year of the date for each entry 
Select Id, Name, Year(Date) As yr From table1 Into Cursor temp2 

*-- Identify those rows that appear for the first time 
Select temp2.*, temp1.firstyear, Iif(temp2.yr = temp1.firstyear, 1, 0) As countme ; 
    FROM temp2 INNER Join temp1 ; 
    ON temp2.Name = temp1.Name Into Cursor temp3 

*-- Add up the "CountMe" fields to get the sum. 
Select yr, Sum(countme) From temp3 Group By yr

來源

2010-09-21 15:06:20

謝謝！但它錯誤「進入遊標」。無法完成。 – maolddv 2010-09-22 02:39:19

謝謝！我確實做到了成功。 – maolddv 2010-09-22 06:53:13

* /第一，得到每名基礎的第一年，他們有一個交易 */...爲除了總交易此人無論年..恩* /的：您的「一」和「c」的人兩個重疊

SELECT ; 
     YT.Name,; 
     MIN(YEAR(YT.DATE)) as FirstYear,; 
     COUNT(*) as TotalPerName; 
    FROM ; 
     YourTable YT; 
    GROUP BY ; 
     1; 
    INTO ; 
     CURSOR C_ByNameTotals

* /現在你已經根據每個人的第一年，其總 * /條目無論一年的總和，獲得一年總和總計有一個給定年份的 * /條目....然後所有原始年份可能性的聯盟 * /不在C_ByNameTotals中集合。（因此你的2007年和2008年）

SELECT; 
     FirstYear as FinalYear,; 
     SUM(TotalPerName) as YrCount; 
    FROM ; 
     C_ByNameTotals; 
    GROUP BY ; 
     1; 
    INTO ; 
     CURSOR C_FinalResults; 
UNION; 
SELECT DISTINCT; 
     YEAR(Date) as FinalYear,; 
     0 as YrCount; 
    FROM ; 
     YourTable ; 
    WHERE ; 
     YEAR(Date) NOT IN ; 
      (select FirstYear FROM C_ByNameTotals)

來源

2010-09-22 16:01:26 DRapp

計數有狀態的FoxPro

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