SQLクエリの問題を解決しようとしています

Question

この2つのSQLクエリは、日付と時刻の基準が異なるだけです。データを返します。データを返す

クエリ -

SELECT * 
FROM CA_CLN_CAPM_TRANSPORT, 
    CA_ENCOUNTER_REF TRANSPORT_PATIENT_ENCOUNTER, 
    (SELECT DISTINCT TRANSPORT_PATIENT_ATTRIBUTES.ENCOUNTER_ID, 
    TRANSPORT_PATIENT_ATTRIBUTES.ATTRIBUTE_NAME 
    FROM CA_CAPM_ENCOUNTER_ATTR TRANSPORT_PATIENT_ATTRIBUTES, 
    CA_CLN_CAPM_TRANSPORT 
    WHERE (CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM BETWEEN TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM AND NVL(TRANSPORT_PATIENT_ATTRIBUTES.EFF_END_DTTM,SYSDATE) 
    OR NVL(CA_CLN_CAPM_TRANSPORT.COMPLETE_DTTM,SYSDATE) BETWEEN TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM AND NVL(TRANSPORT_PATIENT_ATTRIBUTES.EFF_END_DTTM,SYSDATE) 
    OR TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM BETWEEN CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AND NVL(CA_CLN_CAPM_TRANSPORT.COMPLETE_DTTM,SYSDATE)) 
    AND CAST(CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AS DATE) BETWEEN '30-06-2016 12:00:00' AND **'30-06-2016 23:59:00'** 
) PATIENT_ATTRIBUTES 
WHERE CA_CLN_CAPM_TRANSPORT.ENCOUNTER_ID  = TRANSPORT_PATIENT_ENCOUNTER.ENCOUNTER_ID 
AND TRANSPORT_PATIENT_ENCOUNTER.ENCOUNTER_ID = PATIENT_ATTRIBUTES.ENCOUNTER_ID(+) 
AND TRANSPORT_PATIENT_ENCOUNTER.PATIENT_ID <> '0' 
AND CAST(CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AS DATE) BETWEEN '30-06-2016 12:00:00' AND **'30-06-2016 23:59:00'**; 

クエリデータを返さない -

SELECT * 
FROM CA_CLN_CAPM_TRANSPORT, 
    CA_ENCOUNTER_REF TRANSPORT_PATIENT_ENCOUNTER, 
    (SELECT DISTINCT TRANSPORT_PATIENT_ATTRIBUTES.ENCOUNTER_ID, 
    TRANSPORT_PATIENT_ATTRIBUTES.ATTRIBUTE_NAME 
    FROM CA_CAPM_ENCOUNTER_ATTR TRANSPORT_PATIENT_ATTRIBUTES, 
    CA_CLN_CAPM_TRANSPORT 
    WHERE (CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM BETWEEN TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM AND NVL(TRANSPORT_PATIENT_ATTRIBUTES.EFF_END_DTTM,SYSDATE) 
    OR NVL(CA_CLN_CAPM_TRANSPORT.COMPLETE_DTTM,SYSDATE) BETWEEN TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM AND NVL(TRANSPORT_PATIENT_ATTRIBUTES.EFF_END_DTTM,SYSDATE) 
    OR TRANSPORT_PATIENT_ATTRIBUTES.EFF_BEGIN_DTTM BETWEEN CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AND NVL(CA_CLN_CAPM_TRANSPORT.COMPLETE_DTTM,SYSDATE)) 
    AND CAST(CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AS DATE) BETWEEN '30-06-2016 12:00:00' AND **'01-07-2016 23:59:00'** –Running for longer time frame 
) PATIENT_ATTRIBUTES 
WHERE CA_CLN_CAPM_TRANSPORT.ENCOUNTER_ID  = TRANSPORT_PATIENT_ENCOUNTER.ENCOUNTER_ID 
AND TRANSPORT_PATIENT_ENCOUNTER.ENCOUNTER_ID = PATIENT_ATTRIBUTES.ENCOUNTER_ID(+) 
AND TRANSPORT_PATIENT_ENCOUNTER.PATIENT_ID <> '0' 
AND CAST(CA_CLN_CAPM_TRANSPORT.SCHEDULED_DTTM AS DATE) BETWEEN '30-06-2016 12:00:00' AND **'01-07-2016 23:59:00'**; 

Answer 1

問題は、日付・時刻の値を表す文字列の使用です。私たちはあなたの文字列でDUMP()を実行すると、私たちはこれを取得：

SQL> select dump('30-06-2016 12:00:00') as dt 
    2 from dual 
    3/

DT 
----------------------------------------------------------------------- 
Typ=96 Len=19: 51,48,45,48,54,45,50,48,49,54,32,49,50,58,48,48,58,48,48 

SQL> 

Typ=96は、それがa CHAR value（日付はTyp=12だろう）であることを意味します。したがって、Oracleは操作に文字セマンティクスを適用します。効果本で...

x BETWEEN '30-06-2016 12:00:00' AND '01-07-2016 23:59:00' 

...明らかにナンセンスである

'30' >= '30' AND '30' <= '01' 

... ...に評価されます。

何をする必要が書式マスクを明示的なキャストを使用している：

BETWEEN to_date('30-06-2016 12:00:00', 'DD-MM-YYYY HH24:MI:SS') 
    AND to_date('01-07-2016 23:59:00', 'DD-MM-YYYY HH24:MI:SS')