CODEWITHSUNDEEP
sqloracle-database
80root
80root

Reputation: 3

oracle sql - get difference between 2 dates (sysdate minus the datevalue of a other table)

I want to know the difference betweeen 2 dates.

I need something like this: "sysdate minus the datevalue of a other table"

Currently I have something like this, but it's not working

SELECT something FROM myTable1 WHERE mydate >= sysdate-(SELECT latestExport FROM myTable2 WHERE id=1);

The 2nd select statement prints the date of the latest export. Example "27-JUL-21".

thanks for your help.

Upvotes: 0

Views: 109

Answers (1)

TimLer
TimLer

Reputation: 1360

It can not work. Because the result of

sysdate-(SELECT latestExport FROM myTable2 WHERE id=1)

is a decimal value. For example 5121.2 days difference between SYSDATE and latestExport and you can not compare your Date value mydate with a decimal. This is the logic you used:

Is "25-10-2020" >= 5121.2 ?

You need to think again about the result you want to get from this query.

Upvotes: 3

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