[英]ORACLE SQL Finding the next specific value, put it in one row and calculate the difference between times
[英]Finding the difference of times in oracle sql
我有一個包含兩列(數據類型為 varchar2)的表,其中包含時間戳。 我想找到時間戳的差異,即; ADDITIONAL_COLUMN2 和 ADDITIONAL_COLUMN1 之間的時間戳差異。
我的表格列:
我嘗試了下面的代碼,但它給了我錯誤。
SELECT (extract(DAY FROM ADDITIONAL_COLUMN2-ADDITIONAL_COLUMN1)*24*60*60)+
(extract(HOUR FROM ADDITIONAL_COLUMN2-ADDITIONAL_COLUMN1)*60*60)+
(extract(MINUTE FROM ADDITIONAL_COLUMN2-ADDITIONAL_COLUMN1)*60)+
extract(SECOND FROM ADDITIONAL_COLUMN2-ADDITIONAL_COLUMN1) into diff
FROM Table;
錯誤:缺少關鍵字。
詢問:
SELECT (extract(DAY FROM to_timestamp_tz(ADDITIONAL_COLUMN2)-to_timestamp_tz(ADDITIONAL_COLUMN1))*24*60*60)+
(extract(HOUR FROM to_timestamp_tz(ADDITIONAL_COLUMN2)-to_timestamp_tz(ADDITIONAL_COLUMN1))*60*60)+
(extract(MINUTE FROM to_timestamp_tz(ADDITIONAL_COLUMN2)-to_timestamp_tz(ADDITIONAL_COLUMN1))*60)+
extract(SECOND FROM to_timestamp_tz(ADDITIONAL_COLUMN2)-to_timestamp_tz(ADDITIONAL_COLUMN1))
FROM MISIMD_FOM_SPM_AUDIT;
查詢 2:
with cte (diff) as (
select to_timestamp_tz(additional_column2, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM')
- to_timestamp_tz(additional_column1, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM')
as diff
from MISIMD_FOM_SPM_AUDIT
)
select (extract(day from diff)*24*60*60)
+ (extract(hour from diff)*60*60)
+ (extract(minute from diff)*60)
+ extract(second from diff) as diff
from cte;
這個查詢給了我所需的 output。 查詢 2 的 Output
“ORA-00905:缺少關鍵字”錯誤是因為您必須into
而不是as
; 改變這一點:
... AS diff
現在有效,但是...
我變成了as。 我收到以下錯誤 ORA-30076: invalid extract field for extract source
這意味着您的列實際上不是時間戳, 它們是字符串,因此您需要先將它們轉換為實際時間戳:
with cte (ts1, ts2) as (
select to_timestamp_tz(additional_column1, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM'),
to_timestamp_tz(additional_column2, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM')
from your_table
)
select (extract(day from ts2-ts1)*24*60*60)
+ (extract(hour from ts2-ts1)*60*60)
+ (extract(minute from ts2-ts1)*60)
+ extract(second from ts2-ts1) as diff
from cte;
或在 CTE 中也進行計算:
with cte (diff) as (
select to_timestamp_tz(additional_column2, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM')
- to_timestamp_tz(additional_column1, 'YYYY-MM-DD"T"HH24:MI:SS.FFTZH:TZM')
as diff
from your_table
)
select (extract(day from diff)*24*60*60)
+ (extract(hour from diff)*60*60)
+ (extract(minute from diff)*60)
+ extract(second from diff) as diff
from cte;
我執行以下測試用例,它顯然使用了我自己的 NLS 設置:
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_RDBMS_VERSION 12.2.0.1.0
NLS_NCHAR_CONV_EXCP FALSE
NLS_LENGTH_SEMANTICS BYTE
NLS_COMP BINARY
NLS_DUAL_CURRENCY $
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_SORT BINARY
NLS_DATE_LANGUAGE AMERICAN
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_DATE_FORMAT DD-MON-RR
NLS_CALENDAR GREGORIAN
NLS_NUMERIC_CHARACTERS .,
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_CHARACTERSET AL32UTF8
NLS_ISO_CURRENCY AMERICA
NLS_CURRENCY $
NLS_TERRITORY AMERICA
NLS_LANGUAGE AMERICAN
SQL> create table my_test ( c1 timestamp , c2 timestamp ) ;
Table created.
SQL> insert into my_test values ( systimestamp , null ) ;
1 row created.
SQL> -- I wait for a couple of seconds
SQL> update my_test set c2=systimestamp ;
1 row updated.
SQL> commit;
Commit complete.
SQL> col c1 for a40
SQL> col c2 for a40
SQL> select c1,c2 from my_test ;
C1 C2
---------------------------------------- ----------------------------------------
30-JUN-20 11.03.01.262132 AM 30-JUN-20 11.03.16.079616 AM
SQL> SELECT (extract(DAY FROM c2-C1)*24*60*60)+
2 (extract(HOUR FROM C2-C1)*60*60)+
3 (extract(MINUTE FROM C2-C1)*60)+
4 extract(SECOND FROM C2-C1)
5* FROM my_test
SQL> /
(EXTRACT(DAYFROMC2-C1)*24*60*60)+(EXTRACT(HOURFROMC2-C1)*60*60)+(EXTRACT(MINUTEFROMC2-C1)*60)+EXTRACT(SECONDFROMC2-C1)
----------------------------------------------------------------------------------------------------------------------
14.817484
SQL>
您不能將 INTO 放入查詢中,即 PL/SQL,而不是 SQL。 究竟是什么問題,因為您的查詢對我有用,只要我刪除了它的 INTO 部分。
更新答案
由於您的案例使用 varchar2 作為時間戳列並用它存儲時區(如果您問我,這是沒有意義的),情況有所不同。 您需要對查詢應用轉換以將 varchar2 轉換為正確的時間戳。
SQL> create table my_test ( c1 varchar2(100), c2 varchar2(100) );
Table created.
SQL> insert into my_test values ( to_char(systimestamp) , null );
1 row created.
SQL> update my_test set c2=to_char(systimestamp) ;
1 row updated.
SQL> commit;
Commit complete.
SQL> set lines 200
SQL> col c1 for a50
SQL> col c2 for a50
SQL> select c1,c2 from my_test ;
C1 C2
-------------------------------------------------- --------------------------------------------------
30-JUN-20 11.12.11.094964 AM +02:00 30-JUN-20 11.12.26.082914 AM +02:00
在這里您可以看到這些值存儲為 varchar2 但帶有時區格式的時間戳。
SQL> select to_timestamp_tz(c1) , to_timestamp_tz(c2) from my_test ;
TO_TIMESTAMP_TZ(C1) TO_TIMESTAMP_TZ(C2)
--------------------------------------------------------------------------- ---------------------------------------------------------------------------
30-JUN-20 11.12.11.094964000 AM +02:00 30-JUN-20 11.12.26.082914000 AM +02:00
現在,您之前使用的相同查詢
SQL> SELECT (extract(DAY FROM to_timestamp_tz(c2)-to_timestamp_tz(C1))*24*60*60)+
2 (extract(HOUR FROM to_timestamp_tz(c2)-to_timestamp_tz(C1))*60*60)+
3 (extract(MINUTE FROM to_timestamp_tz(c2)-to_timestamp_tz(C1))*60)+
4 extract(SECOND FROM to_timestamp_tz(c2)-to_timestamp_tz(C1))
FROM my_test; 5
(EXTRACT(DAYFROMTO_TIMESTAMP_TZ(C2)-TO_TIMESTAMP_TZ(C1))*24*60*60)+(EXTRACT(HOURFROMTO_TIMESTAMP_TZ(C2)-TO_TIMESTAMP_TZ(C1))*60*60)+(EXTRACT(MINUTEFROMTO_TIMESTAMP_TZ(C2)-TO_TIMESTAMP_TZ(C1))*60)+EXT
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
14.98795
SQL>
希望能幫助到你。
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