Vol. I · A Postgres HandbookTwelve chapters · · 756 queries

The Query & the Schema

A reading-room reference for writing PostgreSQL by hand — selects to window functions, with the schema in plain view.

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Chapters · Basic SELECT · Query 012 / 136
EasyBasic SELECT

Show total sum of all product prices in stock

The query

SQL
SELECT
  SUM(price * stock) AS total_inventory_value
FROM products
WHERE is_active = TRUE;
Tested against PostgreSQL 16

Note

“SUM can operate on expressions, not just columns.

Tables referenced

  • products6 cols

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The Query & the Schema

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Compiled for Postgres 16 · MMXXVI