获得两个计数,然后将它们分开

Question

我试图获得两个计数,然后将这两个计数除以得到我计算的项目的比率.我在这里看到这篇文章并尝试过.我的结果中出现错误,没有错误消息只是错误的数字.我正在使用SQL-Server 2008

这是我的代码:

-- INTERNAL PEPPER REPORT
--#####################################################################

-- VARIABLE DECLARATION AND INITIALIZATION
DECLARE @SD DATETIME
DECLARE @ED DATETIME

SET @SD = '2013-01-01'
SET @ED = '2013-03-31'

-- TABLE DECLARATION ##################################################
DECLARE @TABLE1 TABLE(NUMERATOR INT, DENOMINATOR INT, RATIO INT)
--#####################################################################

-- WHAT GETS INSERTED INTO TABLE 1
INSERT INTO @TABLE1
SELECT
A.NUM, A.DENOM, A.NUM/A.DENOM 

FROM
(
-- COLUMN SELECTION. TWO NUMBERS WILL REPRESENT A NUM AND A DENOM
SELECT 
    (SELECT COUNT(DRG_NO)
        FROM smsdss.BMH_PLM_PtAcct_V
        WHERE drg_no IN (061,062,063,064,065,066)
        AND Adm_Date BETWEEN @SD AND @ED
        AND PLM_PT_ACCT_TYPE = 'I')
        AS NUM,
    (SELECT COUNT(DRG_NO)
        FROM smsdss.BMH_PLM_PtAcct_V
        WHERE drg_no IN (061,062,063,064,065,066,067,068,069)
        AND Adm_Date BETWEEN @SD AND @ED
        AND Plm_Pt_Acct_Type = 'I')
        AS DENOM
)A

SELECT NUMERATOR, DENOMINATOR, RATIO
FROM @TABLE1

计数产生并正确显示,但是对于一个比例,我得到0并且不确定为什么我得到这个.

谢谢,

Answer 1

使用 SELECT A.NUM, A.DENOM, cast(A.NUM as float)/cast(A.DENOM as float)

SQL Server认为A.NUM/A.DENOM是int,因为A.NUM和A.DENUM是int