Date Difference in Days [duplicate] - sql

This question already has answers here:
Calculating difference between two timestamps in Oracle in milliseconds
(11 answers)
Closed 8 years ago.
I'm trying to find the difference between a TIMESTAMP(6) field and a DATE field in oracle sql to return number of days.
Anyone know how to convert these?

i tried to_date, to_number and a few other functions. I actually got it to work by using trunc on my datetimestamp
(a.date- trunc(b.datetimestamp))

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How to get difference between 2 dates in PostgreSQL with TIMESTAMPDIFF? [duplicate]

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Difference between two dates in postgresql
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Difference in years between two dates
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How to get difference of days/months/years (datediff) between two dates?
(10 answers)
Closed 4 years ago.
I'm trying to get it as:
SELECT * FROM "Employee" WHERE TIMESTAMPDIFF('YEAR', "BirthDate", "HireDate");
but I get the next error:
ERROR: function timestampdiff(unknown, timestamp without time zone, timestamp without time zone) does not exist
LINE 1: SELECT * FROM "Employee" WHERE TIMESTAMPDIFF('YEAR', "BirthD...
^
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
I've found another way to get difference between 2 dates but in my instructions it says that I have to get it via TIMESTAMPDIFF.
Can someone help me where to look and how to fix my error?
you can use minus operator
EXTRACT(DAY FROM (HireDate)-(BirthDate)) AS DateDifference
Example select date '2001-10-01' - date '2001-09-28'
DEMO IN FIDDLE
PostGrey Docs

SQLITE date formate [duplicate]

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Sqlite convert string to date
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Reformat dates in column
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How can I convert the Date format for column in sqlite table?
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Closed 5 years ago.
I am currently working on a project that utilizes SQLite. I need to covert a stored date format from MM/DD/YYYY to YYYY/MM/DD. However, I don't know how to convert in SQLite.
Please take a look here:
https://sqlite.org/lang_datefunc.html
What you need is strftime function to specify the format.

query oracle datetime to retrieve only date [duplicate]

This question already has answers here:
How to extract only date value from date field in Oracle? [duplicate]
(3 answers)
Closed 7 years ago.
I know this is simple but am having great difficulty, I need to take a query field that is datetime and convert it so that it is only date no time.
SELECT COSTLABR.CHARGDTTM
FROM imsv7.costlabr
Gets me the datetime field from chargdttm but I need it to only be date, or as an alternative the time to be exactly the same for every row returned.
This has got to be simple but it is eluding me.
Thanks in advance!
Steven
You can use the TRUNC function to truncate dates:
SELECT TRUNC(COSTLABR.CHARGDTTM)
FROM imsv7.costlabr
will set the HOURS, MINUTES, and SECONDS portions of the date column to zero, in effect changing the time to the preceding midnight.

How to retrieve DateTime from a Timestamp column in a table in SQL? [duplicate]

This question already has answers here:
How to convert SQL Server's timestamp column to datetime format
(14 answers)
Closed 9 years ago.
I am using following query but it doesn't provide any meaningful output:
Select Cast(versionno as bigint) from BranchDetail
The value in Version column is like this : 0x000000000D2537F7
A TIMESTAMP has nothing to do with date and time. See this question. It is a ROWVERSION, not a date/time value.

Oracle timestamp in number format SQL [duplicate]

This question already has answers here:
Convert Unixtime to Datetime SQL (Oracle)
(2 answers)
Closed 9 years ago.
I have my datetime column in table defined as Oracle NUMBER data type which contains data in this format 1363709957 for example.
I want to get these numbers in query so i can execute my insert scripts which will put in current time in there. What is the oracle SQL for that?
Your time stamp appears to be a standard Unix time stamp. You need to use arithmetic to convert this here's a post on OTN about this,
and one for the other direction.