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20 lines
471 B
Markdown
20 lines
471 B
Markdown
# Creating Indexes With Ecto
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Using indexes in the right places within relational databases is a great way
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to speed up queries.
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To add a basic index in an Ecto migration, use `Ecto.Migration.index\2`:
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```elixir
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create index(:users, [:email])
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```
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Creating a composite index doesn't require jumping through any hoops; just
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put the relevant column names in the list:
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```elixir
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create index(:posts, [:user_id, :title])
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```
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See `h Ecto.Migration.index` for more details.
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