我是SQL的新手,我遇到了下面的查询问题。我需要返回在过去24小时内输入的订单会话,如果我没有最后一个语句,查询将返回所有订单会话,但我只需要过去24小时内的那些。 CCDBA.O_PAT.ORDER_DDT不是Oracle Date需要使用ddt.tochar转换为可读日期的数字。
-2,147,483,648 and 2,147,483,647 (inclusive).
我得到了以下错误:
int
来自`from distutils.core import setup
import py2exe
# setup.py
#
class Target:
def __init__(self, **kw):
self.__dict__.update(kw)
# for the versioninfo resources
self.version = "0.5.0"
self.company_name = "Company"
self.copyright = "no copyright"
self.name = "Test22"
myservice = Target(
description = 'Edit Logon Service',
modules = ['Logon_Service'],
cmdline_style='pywin32'
) `
的原始数据如下所示:SELECT DISTINCT
CCDBA.O_PAT.SESSION_ID,
CCDBA.PATIENT.MEDREC_ID "MRN",
CCDBA.PATIENT.VISIT_NUMBER "Account Number",
CCDBA.PATIENT.LAST_NAME || ', ' || CCDBA.PATIENT.FIRST_NAME "Patient",
CCDBA.PATIENT.DEPT_ID "Floor",
CCDBA.PATIENT.ROOM_ID "Room",
ddt.tochar(CCDBA.O_PAT.ORDER_DDT) "Order Date"
FROM CCDBA.PATIENT
INNER JOIN CCDBA.O_PAT ON CCDBA.O_PAT.PAT_SEQ = CCDBA.PATIENT.PAT_SEQ
WHERE CCDBA.O_PAT.ORDER_ID = '681278'
AND TO_DATE(ddt.tochar(CCDBA.O_PAT.ORDER_DDT), 'DD-MON-YY HH24:MI:SS')
>= SYSDATE -1;
使用ddt.tochar进行转换后来自ORA-01843: not a valid month
01843. 00000 - "not a valid month"
*Cause:
*Action:
的外观数据:CCDBA.O_PAT.ORDER_DDT
答案 0 :(得分:0)
您无需将日期转换为字符串,然后再返回以比较日期。简化条件:
WHERE CCDBA.O_PAT.ORDER_ID = '681278' AND
CCDBA.O_PAT.ORDER_DDT >= SYSDATE - 1;
此外,如果您正在学习SQL,请学习使用表别名。生成的查询更易于编写和阅读:
SELECT DISTINCT o.SESSION_ID,
p.MEDREC_ID as "MRN",
p.VISIT_NUMBER as "Account Number",
p.LAST_NAME || ', ' || p.FIRST_NAME as "Patient",
p.DEPT_ID as "Floor",
p.ROOM_ID as "Room",
ddt.tochar(o.ORDER_DDT) as "Order Date"
FROM CCDBA.PATIENT p INNER JOIN
CCDBA.O_PAT o
ON o.PAT_SEQ = p.PAT_SEQ
WHERE o.ORDER_ID = '681278' AND c.ORDER_DDT >= SYSDATE - 1;
而且,如果您不需要DISTINCT
,请不要使用它。它只是在不需要时浪费处理时间。
编辑:
修改日期格式:
WHERE CCDBA.O_PAT.ORDER_ID = '681278' AND
TO_DATE(ddt.tochar(CCDBA.O_PAT.ORDER_DDT),
'MM/DD/YYYY HH24:MI') >= sysdate - 1;