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Update docs/en/sql-reference/statements/alter/projection.md

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Dan Roscigno 2022-11-23 10:39:10 -05:00 committed by GitHub
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@ -17,7 +17,7 @@ Projections will create internally a new hidden table, this means that more IO a
Example, If the projection has defined a different primary key, all the data from the original table will be duplicated.
:::
You can see more technical details about how projections work internally on this [page]([url](https://clickhouse.com/docs/en/guides/improving-query-performance/sparse-primary-indexes/sparse-primary-indexes-multiple/#option-3-projections)).
You can see more technical details about how projections work internally on this [page](/docs/en/guides/improving-query-performance/sparse-primary-indexes/sparse-primary-indexes-multiple.md/#option-3-projections).
## Example filtering without using primary keys