Create index

sql

CREATE INDEX idx_orders_customer_id
ON orders (customer_id);

Explanation

Indexes speed up reads but add write overhead and storage cost.

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Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Same sheet · prioritizing Constraints and Indexes

Index multiple columns together.

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Mark a column as the main row identifier.

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Ensure a column or column set stays unique.

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Restrict column values with a boolean rule.

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Define a new table with columns and constraints.

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Modify an existing table by adding a new column.

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