压缩历史至 95081aff

support-files/sql/create_clickhouse.sql

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+CREATE DATABASE IF NOT EXISTS linux_do_credit;
+
+USE linux_do_credit;
+
+CREATE TABLE IF NOT EXISTS orders
+(
+    id                UInt64,
+    order_name        String,
+    merchant_order_no String,
+    client_id         String,
+    payer_user_id     UInt64,
+    payee_user_id     UInt64,
+    amount            Decimal(20, 2),
+    status            LowCardinality(String),
+    type              LowCardinality(String),
+    remark            String,
+    payment_type      LowCardinality(String),
+    trade_time        DateTime,
+    expires_at        DateTime,
+    created_at        DateTime,
+    updated_at        DateTime
+)
+    ENGINE = ReplacingMergeTree(updated_at)
+        PARTITION BY toYYYYMM(created_at)
+        ORDER BY (created_at, id)
+        SETTINGS index_granularity = 8192;
+
+-- ============================================================
+-- 常用查询示例
+-- ============================================================
+
+-- 查询单个订单（加 FINAL 获取最新版本）
+-- SELECT * FROM orders FINAL WHERE id = 1001;
+
+-- 按用户统计订单
+-- SELECT payer_user_id, count() AS cnt, sum(amount) AS total
+-- FROM orders FINAL
+-- WHERE status = 'success'
+-- GROUP BY payer_user_id;
+
+-- 按月统计（利用分区裁剪）
+-- SELECT toYYYYMM(created_at) AS month, count() AS orders, sum(amount) AS volume
+-- FROM orders FINAL
+-- GROUP BY month
+-- ORDER BY month;