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Update apps/docs/pages/guides/database/postgres/indexes.mdx

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Co-authored-by: Copple <10214025+kiwicopple@users.noreply.github.com>
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Ant WilsonandCopple authored and GitHub committed 2023-03-03 18:38:10 +08:00
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@@ -6,7 +6,7 @@ export const meta = {
footerHelpType: 'postgres',
}
An index in Postgres is a kind of reference list (analogous to a table of contents or glossary section in a book) which allows queries to quickly locate a row in a given table without needing to scan the entire table, which in large tables can take a long time.
An index makes your Postgres queries faster. The index is like a "table of contents" for your data - a reference list which allows queries to quickly locate a row in a given table without needing to scan the entire table (which in large tables can take a long time).
Indexes can be structured in a few different ways. The type of index chosen often depends on the values you are indexing. By far the most common index type, and the default in Postgres, is the B-Tree. A B-Tree is the generalized form of a binary search tree, where nodes can have more than two children.