If I have a clustered index on a table is it safe to delete, and if I do, does it leave the table ordered the same way it was while indexed?
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If I have a clustered index on a table is it safe to delete, and if I do, does it leave the table ordered the same way it was while indexed?
It’s always safe to delete technically, but whether it makes sense in a design/architecture/performance prespective we can’t say.
The data will remain in the order on disk until update/inserts happen, but please don’t rely on that at all, ever. Output is only guaranteed whan you use an ORDER BY in the outermost SELECT