Hi everyone I wanna ask u about how I can bring data last 24 hours into bar charts, is there any methods to make it please
I have this table without data
datetime
clientchannel
servicename
service_count
13_02_2022 9:35
*****
notification
2
It is a WHERE clause you need, I presume. Something like this:
select ...
from your_table
where datetime >= sysdate - 1;
Why? Because - when you subtract a number from DATE datatype value in Oracle - it subtracts that many days.
SQL> alter session set nls_date_format = 'dd.mm.yyyy hh24:mi:ss';
Session altered.
SQL> select sysdate right_now,
2 sysdate - 1 yesterday
3 from dual;
RIGHT_NOW YESTERDAY
------------------- -------------------
13.02.2022 11:01:34 12.02.2022 11:01:34
SQL>
If you store date values as strings (which means that DATETIME column is declared as e.g. VARCHAR2(20), and that's really bad idea), then you first have to convert it to a valid date datatype value - use TO_DATE function with appropriate format mask:
where to_date(datetime, 'dd_mm_yyyy hh24:mi') >= sysdate - 1
[EDIT] If you want to go 60 minutes back, then subtract that many minutes:
SQL> select sysdate right_now,
2 sysdate - interval '60' minute an_hour_ago
3 from dual;
RIGHT_NOW AN_HOUR_AGO
------------------- -------------------
14.02.2022 07:09:30 14.02.2022 06:09:30
SQL>
Related
I have a table of sales with an ordered column as a timestamp type.
I would like to find the number of days since the last order. I though it should be simple.
I have tried various methods, but I can’t get a meaningful answer:
select max(ordered) from sales; -- 2022-05-17 22:47:24.467000
select sysdate-max(ordered) from sales; -- Unknown column type: 10
select current_time_stamp-max(ordered) from sales; -- Unknown column type: 10
I want to use the result in a CTE to then add to some other dates, so I thought it should at least result in either an interval type or a number of days.
How can I get the age of the above date?
There are 2 common options:
cast timestamp to date and use sysdate - cast(max(...) as date) - in this case you'll get a number in days:
SQL> select sysdate - cast(timestamp'2000-01-01 00:00:00' as date) diff1 from dual;
DIFF1
----------
8290.97766
use systimestamp - max(...) - in this case you'll get an Interval Day to Second:
SQL> select systimestamp - timestamp'2000-01-01 00:00:00' from dual;
SYSTIMESTAMP-TIMESTAMP'2000-01-0100:00:00'
------------------------------------------
+000008291 00:27:19.105859000
I've inherited some data from an external source which is a timestamp. This was put into warehouse by someone as a varchar2. I need to convert this to a legitimate timestamp but am unsure how. This is how the string looks. "2021-04-23T11:02:17.00Z".
Would appreciate some help.
PS Ideally, I'd also like to know how to trunc this to a more traditional date format of DD-MMM-YYYY e.g. 21-Jan-2021 or even DD-MM-YYYY is fine.
Use to_timestamp_tz() to get the corresponding timstamp with time zone, convert it to the timezone you want it in (for example sessiontimezone) with AT TIME ZONE and cast() that to a timestamp.
SELECT cast(to_timestamp_tz('2021-04-23T11:02:17.00Z', 'YYYY-MM-DD"T"HH24:MI:SS.FF2:TZR') AT TIME ZONE sessiontimezone AS timestamp)
FROM dual;
db<>fiddle
Shouldn't be too difficult. Extract the "date" part, apply TO_DATE function to it (with appropriate format mask) and - that's all. It means that you should "stop" at the date_value in the following query. The last, final_result is a string again, just formatted as you wanted.
SQL> with test (col) as
2 (select '2021-04-23T11:02:17.00Z' from dual)
3 select substr(col, 1, 10) string,
4 --
5 to_date(substr(col, 1, 10), 'yyyy-mm-dd') date_value,
6 --
7 to_char(to_date(substr(col, 1, 10), 'yyyy-mm-dd'), 'dd-mm-yyyy') final_result
8 from test;
STRING DATE_VALUE FINAL_RESU
---------- ---------- ----------
2021-04-23 2021-04-23 23-04-2021
SQL>
In order to avoid that "operation", you might even create a view. For example:
This is a table you currently have:
SQL> create table test as
2 (select 1 id, 'Littlefoot' name, '2021-04-23T11:02:17.00Z' col from dual);
Table created.
Create a view, re-using code I posted above:
SQL> create or replace view v_test as
2 select id, name,
3 to_date(substr(col, 1, 10), 'yyyy-mm-dd') col
4 from test;
View created.
Select from it:
SQL> select * from v_test;
ID NAME COL
---------- ---------- ----------
1 Littlefoot 2021-04-23
Want another format? No problem:
SQL> alter session set nls_date_format = 'dd-mon-yyyy';
Session altered.
SQL> select * from v_test;
ID NAME COL
---------- ---------- -----------
1 Littlefoot 23-apr-2021
SQL>
Or, apply TO_CHAR to view's col column (also demonstrated in code I posted first; see the final_result).
You can use the TO_TIMESTAMP function to do this.
Try:
TO_TIMESTAMP('2021-04-23T11:02:17.00Z', 'YYYY-MM-DDTHH:MI:SS')
You can read more about this function in their Documentation
I would like to keep my table's data type as date but I want my table to show date and time in the same column.
This is what I have so far. How do I change the format? I use Oracle SQL.
insert into student
values
(001,
to_date('2018-02-02 21:05:18', 'YYYY-MM-DD HH24:MI:SS'),
'Oriel Road Brisbane',
103,
2486675,
760024,
'fdg57690gmig'
);
You don't have to do anything; that column already contains both date and time. It is the front-end that is supposed to display it as you want. Here are some examples:
SQL> create table test (datum date);
Table created.
SQL> insert into test (datum) values (to_date('2018-02-02 21:05:18', 'YYYY-MM-DD HH24:MI:SS'));
1 row created.
SQL> select * from test;
DATUM
--------
02.02.18
SQL> select to_char(datum, 'hh24:mi:ss') only_time,
2 to_char(datum, 'dd-mon-yy') date_format_1,
3 to_char(datum, 'yyyy-mm-dd hh24:mi:ss') date_and_time
4 from test;
ONLY_TIM DATE_FORMAT_1 DATE_AND_TIME
-------- ------------------ -------------------
21:05:18 02-vel-18 2018-02-02 21:05:18
SQL>
Which means: use TO_CHAR with appropriate format mask, if you use SELECT statement. If it is about e.g. Oracle Apex, Forms or Reports, modify item's format mask.
Alternatively, you may talk to DBA to change NLS settings for the whole database, or you can do it for your session:
SQL> alter session set nls_date_format = 'dd.mm.yyyy hh24:mi:ss';
Session altered.
SQL> select datum from test;
DATUM
-------------------
02.02.2018 21:05:18
Oracle's DATE datatype does store the date and time - there is not date-only datatype in Oracle, unlike some other databases, such as MySQL, that has DATE and DATETIME datatypes.
Your code is correctly inserting a date/time value in the table.
When Oracle displays a date, it uses by default the format defined by parameter NLS_DATE_FORMAT (which, for your database, is probably something that does not include the time portion).
You ca either change the setting at session level:
alter session set nls_date_format = 'yyyy-mm-dd hh24:mi:ss';
Or you can use to_char() on the date column:
select to_char(mydatecol, 'yyyy-mm-dd hh24:mi:ss') as mydatestring
from mytable
Select *
from mytable
where paid_time Between to_date('00:00:00','HH24:MI:SS' ) and to_date('00:59:59','HH24:MI:SS')
and paid_date Between to_date('1/8/2016','DD/MM/RRRR') and
to_date('10/8/2016','DD/MM/RRRR');
Note :
1. I need perticular time period only for 10 days
Error :
1. data is there but returning Zero kindly help to solve this
You need to use the full date and time TO_DATE otherwise there is conflicting WHERE clauses'DD/MM/RRRR hh24:mi:ss'.
SELECT *
FROM mytable
WHERE paid_time BETWEEN TO_DATE('01/08/2016 00:00:00', 'DD/MM/RRRR hh24:mi:ss') AND TO_DATE('10/08/2016 00:59:59', 'DD/MM/RRRR hh24:mi:ss');
If paid_time is a string then your query will only work at all for certain NLS_DATE_FORMAT settings, due to the implicit conversion you are forcing:
alter session set nls_date_format = 'RRRR-MM-DD';
with mytable (paid_date, paid_time) as (
select date '2016-08-02', '00:01:02' from dual
)
Select *
from mytable
where paid_time Between to_date('00:00:00','HH24:MI:SS' ) and to_date('00:59:59','HH24:MI:SS')
and paid_date Between to_date('1/8/2016','DD/MM/RRRR') and
to_date('10/8/2016','DD/MM/RRRR');
no rows selected
alter session set nls_date_format = 'YYYY-MM-DD';
-- same query
ORA-01841: (full) year must be between -4713 and +9999, and not be 0
alter session set nls_date_format = 'DD/MM/RRRR';
-- same query
ORA-01847: day of month must be between 1 and last day of month
... etc.
When you do to_date('00:00:59','HH24:MI:SS') the generated date defaults to the first of the current month, so when run today it will get a September date:
select to_char(to_date('00:00:59','HH24:MI:SS'), 'YYYY-MM-DD HH24:MI:SS') from dual;
TO_CHAR(TO_DATE('00
-------------------
2016-09-01 00:00:59
You are then trying to compare your paid_time string with that date, which means the string is implicitly converted to a date using your NLS settings, e.g.:
alter session set nls_date_format = 'RRRR-MM-DD';
select to_char(to_date('00:01:02'), 'YYYY-MM-DD HH24:MI:SS') from dual;
TO_CHAR(TO_DATE('00
-------------------
2000-01-02 00:00:00
So your filter is really looking for rows where the time string, incorrectly converted to a date (exactly which date depends on your actual NLS setting, and many values will error whatever the setting), is in the first minute of the first day of the current month. Which is very unlikely to ever match anything.
If it is a string and is always formatted consistently then you can just compare as a string:
with mytable (paid_date, paid_time) as (
select date '2016-08-02', '00:01:02' from dual
)
Select *
from mytable
where paid_time Between '00:00:00' and '00:59:59'
and paid_date Between to_date('1/8/2016','DD/MM/RRRR') and
to_date('10/8/2016','DD/MM/RRRR');
PAID_DATE PAID_TIM
---------- --------
2016-08-02 00:01:02
As mentioned in comments Oracle's data datatype includes the time, so storing the date (at midnight, presumably) and the time in separate columns just adds complexity and inefficiency.
I need to set only the day portion of a date in oracle but retain month and year. Can you tell me what to do?
E.g. If date is 01-JAN-15 then i want to set day to 15 as 15-JAN-15.
1* select sysdate, trunc(sysdate, 'MONTH')+14 from dual
SQL> /
SYSDATE TRUNC(SYSDA
----------- -----------
25-sep-2015 15-sep-2015
SQL>