From 20219dd4f7192c61492b7667dd3f15b05dbba044 Mon Sep 17 00:00:00 2001 From: Martin Kagamino Lehoux Date: Sat, 23 Sep 2023 20:19:44 +0200 Subject: feat: Add post to version control --- content/posts/postgres-aggregates/subqueries.sql | 28 ++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 content/posts/postgres-aggregates/subqueries.sql (limited to 'content/posts/postgres-aggregates/subqueries.sql') diff --git a/content/posts/postgres-aggregates/subqueries.sql b/content/posts/postgres-aggregates/subqueries.sql new file mode 100644 index 0000000..38efccd --- /dev/null +++ b/content/posts/postgres-aggregates/subqueries.sql @@ -0,0 +1,28 @@ +EXPLAIN ( + ANALYZE, + COSTS, + VERBOSE, + BUFFERS +) +SELECT + products.id, + products.name, +( + SELECT + COUNT(id) + FROM + reviews + WHERE + product_id = products.id) AS num_reviews, +( + SELECT + COUNT(id) + FROM + orders + WHERE + product_id = products.id) AS num_orders +FROM + products; + +-- WHERE +-- products.id % 10 = 0; -- cgit v1.3