I have a query to update some field on some condition.
Conditions
The time difference is not more than 1 hour and the date can be same.
select *
from Table
where user_cd = 'HARSHIT'
and to_char(sysdate, 'dd/mm/yyyy') = to_char(brth_dt, 'dd/mm/yyyy');
But one condition is also there like at night the user tries to update at 23:30 and after that the he tries next day at 00:15 so the difference is 45 min but the update must execute
select brth_dt from Table where user_cd = 'HARSHIT';
select sysdate from dual;
select brth_dt from Table
where user_cd = 'HARSHIT'
and sysdate-(1/24) < BRTH_DT;
Result of above query
BRTH_DT
25/02/2016 12:30:00
1 row selected.
SYSDATE
24/02/2016 16:7:58
1 row selected.
BRTH_DT
25/02/2016 12:30:00
1 row selected.
I see no reason to convert a date to a string ... if you need to check 2 dates are within an hour of each other, just do the math on the date, and compare :
select * from sir_people
where user_cd = 'HARSHIT'
and BRTH_DT BETWEEN sysdate-(1/24)
AND sysdate;
to_char on a date, for purposes of comparisons, is fundamentally flawed logic and should be avoided.
[edit] based on example provided: it appears you want to exclude future dates, and only include those dates between now, and an hour earlier.
query updated to accomodate that additional requirement.
to_char(col_name, 'yyyy-mm-dd hh24:mi:ss')
just use 24-hour format, I think that should do the work.
Simply translate required condition into sql:
"The time difference is not more than 1 hour and the date can be same."
select *
from Table
where user_cd = 'HARSHIT'
and abs(sysdate-brth_dt) <= 1/24
Related
I have a PostgreSql query, which should make a count of the results that exist between that time frame (between the field "date" and the current time "now"), however the query does nothing but count all the records without applying the filter, does anyone know what I am missing in the query?
This is the query:
SELECT count(*) from table where date between
TO_TIMESTAMP('2022-8-1 12:00:00','YYYY-M-D HH:MI:SS') and now();
Result: 15,480 (all results, does not apply filter "between")
Greetings and thanks
select TO_TIMESTAMP('2022-8-1 12:00:00','YYYY-M-D HH:MI:SS') ;
to_timestamp
------------------------
2022-01-01 00:00:00-08
Per template patterns here Format functionsTable 9.26. Template Patterns for Date/Time Formatting it needs to be:
select TO_TIMESTAMP('2022-08-01 12:00:00','YYYY-MM-DD HH24:MI:SS') ;
to_timestamp
------------------------
2022-08-01 12:00:00-07
Though it would be easier to do something like:
select '2022-8-1 12:00:00'::timestamptz;
timestamptz
------------------------
2022-08-01 12:00:00-07
Ending up with:
SELECT count(*) from table where date between
'2022-8-1 12:00:00'::timestamptz and now();
I have a oracle sql query to get me the dates from 18/05/2021 to '28/05/2021'.
For some reason the the value after slash is not read, as the values from month 4 is also outputed. I dont know where i am wrong. Please give a hand if you are able, thanks a lot for your time.
NOTE: the dates have been stored in the database with a varchar datatype.
SELECT datadate
FROM mytable
WHERE trailerid= '1' and datattime>'05:00:00' and datattime<'12:00:00'
AND datadate between '18/05/2021' and '28/05/2021'
GROUP BY datadate ORDER BY datadate;
Current output
DATADATE
----------------
18/05/2021
19/04/2021
19/05/2021
20/05/2021
21/04/2021
21/05/2021
22/04/2021
22/05/2021
23/04/2021
23/05/2021
24/04/2021
24/05/2021
25/04/2021
25/05/2021
26/04/2021
26/05/2021
27/04/2021
27/05/2021
28/04/2021
28/05/2021
That's what happens when people store date values as strings.
See if this helps:
AND to_date(datadate, 'dd/mm/yyyy') between to_date('18/05/2021', 'dd/mm/yyyy')
and to_date('28/05/2021', 'dd/mm/yyyy')
You don't have to start over, just move the data to a datetime column
ALTER TABLE t ADD x DATE;
UPDATE t SET x = to_date(concat(datadate,datatime), 'dd/mm/yyyyhh24:mi:ss'))
WHERE datadate in (SELECT to_char(to_date('1999-12-31', 'yyyy-mm-dd') + level, 'dd/mm/yyyy') FROM dual CONNECT BY level <= 10000)
That WH ERE clause should generate a list of valid dates from 2000 to about 2030 - if you have dates outside this range adjust accordingly
Should now be able to find invalid dates (they weren't part of the where clause and x should hence remain null) and fix manually:
SELECT * FROM t WHERE x is null
Then drop your datadate and datatime cols and rename x to datadatetime
Now queries like BETWEEN work properly, and if you need just the date part you can do TRUNC(x). (You can even TRUNC to other date parts like hours, to cut the minutes and seconds off, or week of year to round dates down to the start of the week etc)
If you need just the time you either do x - TRUNC(x) which gives a decimal number like 0.5 for 12 noon or 0.75 for 6pm, or you can TOCHAR depending on what you want to do. It would be better to do x -TRUNC(x) BETWEEN 9.0/24.0 AND 17.0/24.0 than doing a string compare
I am trying to get all rowsprior to current time and date including today's transactions.
select * from mytable
where joindate <= trunc(sysdate)
I did not get rows that belong to today.
AM I doing any thing wrong.
Try to run
select trunc(sysdate) from dual;
and you will see an output like 2014-05-24 00:00:00. trunc sets the time to midnight.
You can try
where joindate < trunc(sysdate)+1
to look for all joindates before 2014-05-25 00:00:00 which should meet your requirements.
I have a table with date column in it. I need to fetch the records from it based on
the given date.
Currently when i used the query:
select * from workingemployee_data where created_date like '20-Jan-2012'
I am getting those records which have created_date on 20-Jan-2012
But i want to get the records those were created 10 days earlier to a given
date (i.e) 20-Jan-2012.
Please suggest me on this.
This gives all records between today and 10 days ago:
SELECT *
FROM workingemployee
WHERE created_date BETWEEN sysdate - INTERVAL '10' DAY
AND sysdate
This gives all records entered exactly 10 days ago:
SELECT *
FROM workingemployee
WHERE created_date = sysdate - INTERVAL '10' DAY
Replace sysdate with exact date if you want.
Why do you use like and not = ?
Assuming that created_date is of type DATE, it's bad practice to rely on implicit conversion according to NLS_DATE_FORMAT (this is what happens when you compare a date and a string)
dd-mon-yyyy isn't a good format for querying since it deffers according to NLS_LANGUAGE better use mm for months numbers
So, either use #mvp's answer or do something like this:
SELECT *
FROM workingemployee
WHERE trunc(created_date) = to_date('20-01-2013', 'dd-mm-yyyy') - 10
SELECT *
FROM workingemployee
WHERE created_date > sysdate - INTERVAL '10' DAY;
I'm trying to retrieve records from table by knowing the date in column contains date and time.
Suppose I have table called t1 which contains only two column name and date respectively.
The data stored in column date like this 8/3/2010 12:34:20 PM.
I want to retrieve this record by this query for example (note I don't put the time):
Select * From t1 Where date="8/3/2010"
This query give me nothing !
How can I retrieve date by knowing only date without the time?
DATE is a reserved keyword in Oracle, so I'm using column-name your_date instead.
If you have an index on your_date, I would use
WHERE your_date >= TO_DATE('2010-08-03', 'YYYY-MM-DD')
AND your_date < TO_DATE('2010-08-04', 'YYYY-MM-DD')
or BETWEEN:
WHERE your_date BETWEEN TO_DATE('2010-08-03', 'YYYY-MM-DD')
AND TO_DATE('2010-08-03 23:59:59', 'YYYY-MM-DD HH24:MI:SS')
If there is no index or if there are not too many records
WHERE TRUNC(your_date) = TO_DATE('2010-08-03', 'YYYY-MM-DD')
should be sufficient. TRUNC without parameter removes hours, minutes and seconds from a DATE.
If performance really matters, consider putting a Function Based Index on that column:
CREATE INDEX trunc_date_idx ON t1(TRUNC(your_date));
Personally, I usually go with:
select *
from t1
where date between trunc( :somedate ) -- 00:00:00
and trunc( :somedate ) + .99999 -- 23:59:59
Convert your date column to the correct format and compare:
SELECT * From my_table WHERE to_char(my_table.my_date_col,'MM/dd/yyyy') = '8/3/2010'
This part
to_char(my_table.my_date_col,'MM/dd/yyyy')
Will result in string '8/3/2010'
You could use the between function to get all records between 2010-08-03 00:00:00:000 AND 2010-08-03 23:59:59:000
trunc(my_date,'DD') will give you just the date and not the time in Oracle.
Simply use this one:
select * from t1 where to_date(date_column)='8/3/2010'
Try the following way.
Select * from t1 where date(col_name)="8/3/2010"