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PostgreSQL Cheat Sheet/Update from another table

Update rows using another table in the same statement.

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Section: Insert, Update, Delete, and Merge

Update from another table

sql
sql
UPDATE orders o
SET customer_tier = c.tier
FROM customers c
WHERE o.customer_id = c.customer_id;
Explanation

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Same sheet · prioritizing Insert, Update, Delete, and Merge
Update rows
Modify matching rows.
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Insert row
Insert one row into a table.
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Insert multiple rows
Insert many rows in one statement.
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Insert with RETURNING
Insert rows and immediately return generated values.
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Upsert with ON CONFLICT
Handle unique conflicts by updating instead of failing.
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Delete rows
Delete matching rows.
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