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Doesn't seem like that common of a problem to have to ship code that has to work with different databases. But if I ever had to do such a thing I would just stick with ANSI SQL.

There's no such thing as ANSI SQL for real world applications on real world databases. Even something as simple as limiting the number of rows returned varies widely (TOP vs LIMIT vs rownum).

The correct answer is to forget about database independence and double down on just one[1] so you can use it to its full potential.

[1]: And obviously it should be Postgres...

and you missed "fetch first" which is the ANSI thing

> common of a problem to have to ship code that has to work with different database

when you are not writing a SaaS, but shipping a piece of software for a customer to run on their own server, it's a very common use case to support different database vendors - especially in enterprise software.

Generally the database to use is dictated by the software, that or it will support one or two, not any database.

It's useful to, for instance, run your test suite against an in-memory database like sqlite or hsql, but use a "real" database in production.

I think using VMs or something like Vagrant is a much better solution to that problem. You generally don't want to test against something that's drastically different than what you run in production.

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