sql

-- Create table with JSONB column
CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  email VARCHAR(255) NOT NULL,
  name VARCHAR(255),
  metadata JSONB DEFAULT '{}'::jsonb

use sqlx::PgPool;
use std::time::Duration;
use tokio::sync::mpsc;

#[derive(Debug, Clone)]
pub struct MetricPoint {

-- ROLLUP for hierarchical subtotals
SELECT
  COALESCE(category, 'ALL CATEGORIES') AS category,
  COALESCE(subcategory, 'ALL SUBCATEGORIES') AS subcategory,
  SUM(revenue) AS total_revenue,
  COUNT(*) AS order_count

; PgBouncer configuration file

[databases]
; Database connection strings
mydb = host=localhost port=5432 dbname=mydb
analytics = host=replica.example.com port=5432 dbname=mydb

CREATE TABLE country (
    code       CHAR(2)      PRIMARY KEY,
    name       VARCHAR(128) NOT NULL,
    currency   CHAR(3)      NOT NULL,
    updated_at TIMESTAMPTZ  NOT NULL DEFAULT now()
);

CREATE TYPE outbox_status AS ENUM ('pending', 'retry', 'processing', 'done', 'dead');

CREATE TABLE outbox_events (
    id           BIGINT GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    dedupe_key   TEXT        NOT NULL,
    topic        TEXT        NOT NULL,

-- Pattern: Single Table Inheritance (STI)
CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  type VARCHAR(50) NOT NULL, -- 'admin', 'customer', 'vendor'
  username VARCHAR(100) UNIQUE NOT NULL,
  email VARCHAR(100) UNIQUE NOT NULL,

-- Install TimescaleDB extension
CREATE EXTENSION IF NOT EXISTS timescaledb;

-- Create regular table
CREATE TABLE sensor_data (
  time TIMESTAMPTZ NOT NULL,

model User {
  id        String    @id @default(uuid())
  email     String    @unique
  name      String
  posts     Post[]
  deletedAt DateTime?

-- Primary server configuration (postgresql.conf)
-- wal_level = replica
-- max_wal_senders = 10
-- wal_keep_size = 64MB
-- hot_standby = on

-- Create table with JSONB column
CREATE TABLE users (
  id SERIAL PRIMARY KEY,
  username VARCHAR(50),
  profile JSONB,
  preferences JSONB,

CREATE TABLE events (
    id          bigint GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    source      text        NOT NULL,
    external_id text        NOT NULL,
    payload     jsonb       NOT NULL,
    occurred_at timestamptz NOT NULL,