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Editorial Team
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Asked: 2026-06-06T01:39:23+00:00

I have been tasked with converting some scripts referencing an Informix database to be

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I have been tasked with converting some scripts referencing an Informix database to be compatible with a new Oracle database.

I thought I would start out by going through the individual scripts and looking for function calls that may vary syntactically between Informix and Oracle. I had been able to find the Oracle equivalent for most of the function calls I came across, however this one has me a little stumped:

where f.writetime > current - interval(xxx) day to day

What exactly does that function mean, particularly the (xxx) part and what is the Oracle equivalent?

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1 Answer

  1. Editorial Team

    It’s not a function call – it’s Informix SQL’s INTERVAL data type literal syntax.

    Oracle SQL supports the interval data type as well.

    I would expect that oracle would give a similar result with

    WHERE f.writetime > current_timestamp - INTERVAL 'xxx' DAY TO DAY

    Essentially, when the writetime is greater than the current time minus xxx days.

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