278 lines
8.2 KiB
JSON
278 lines
8.2 KiB
JSON
{
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"table": "ecommerce_orders",
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"row_count": 10000,
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"role": "fact",
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"grain": ["order_id"],
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"time": {
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"column": "order_date",
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"granularity": "day",
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"range": ["2024-04-20", "2025-04-19"],
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"has_gaps": false
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},
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"columns": [
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{
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"name": "order_id",
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"dtype": "string",
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"semantic_type": "id",
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"null_rate": 0.0,
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"distinct_count": 10000,
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"distinct_ratio": 1.0,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 1.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "customer_id",
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"dtype": "integer",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 2713,
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"distinct_ratio": 0.2713,
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"stats": {"min": 1, "max": 2999, "mean": 995.29, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.3,
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"metric_candidate_score": 0.1,
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"comment": ""
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},
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{
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"name": "product_id",
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"dtype": "integer",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 1000,
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"distinct_ratio": 0.0999,
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"stats": {"min": 1, "max": 1000, "mean": 504.87, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [],
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"pk_candidate_score": 0.1,
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"metric_candidate_score": 0.1,
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"comment": ""
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},
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{
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"name": "category",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 6,
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"distinct_ratio": 0.0006,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "Beauty", "pct": null},
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{"value": "Books", "pct": null},
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{"value": "Clothing", "pct": null},
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{"value": "Electronics", "pct": null},
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{"value": "Home", "pct": null},
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{"value": "Toys", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "price",
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"dtype": "float",
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"semantic_type": "metric",
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"null_rate": 0.0,
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"distinct_count": 9013,
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"distinct_ratio": 0.9013,
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"stats": {"min": 5.06, "max": 499.93, "mean": 252.55, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.9,
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"comment": ""
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},
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{
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"name": "quantity",
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"dtype": "integer",
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"semantic_type": "metric",
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"null_rate": 0.0,
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"distinct_count": 9,
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"distinct_ratio": 0.0009,
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"stats": {"min": 1, "max": 9, "mean": 2.12, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": 1, "pct": null},
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{"value": 2, "pct": null},
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{"value": 3, "pct": null},
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{"value": 4, "pct": null},
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{"value": 5, "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.7,
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"comment": ""
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},
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{
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"name": "order_date",
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"dtype": "string",
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"semantic_type": "time",
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"null_rate": 0.0,
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"distinct_count": 365,
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"distinct_ratio": 0.0365,
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"stats": {"min": "2024-04-20", "max": "2025-04-19", "mean": null, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "shipping_date",
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"dtype": "string",
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"semantic_type": "time",
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"null_rate": 0.0,
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"distinct_count": 371,
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"distinct_ratio": 0.0371,
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"stats": {"min": "2024-04-21", "max": "2025-04-26", "mean": null, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "delivery_status",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 4,
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"distinct_ratio": 0.0004,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "Delivered", "pct": null},
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{"value": "Pending", "pct": null},
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{"value": "Returned", "pct": null},
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{"value": "Shipped", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "payment_method",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 5,
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"distinct_ratio": 0.0005,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "Apple Pay", "pct": null},
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{"value": "Credit Card", "pct": null},
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{"value": "Debit Card", "pct": null},
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{"value": "Google Pay", "pct": null},
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{"value": "PayPal", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "device_type",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 3,
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"distinct_ratio": 0.0003,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "Desktop", "pct": null},
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{"value": "Mobile", "pct": null},
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{"value": "Tablet", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "channel",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 4,
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"distinct_ratio": 0.0004,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "Email", "pct": null},
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{"value": "Organic", "pct": null},
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{"value": "Paid Search", "pct": null},
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{"value": "Social", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "shipping_address",
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"dtype": "string",
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"semantic_type": "text",
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"null_rate": 0.0,
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"distinct_count": 10000,
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"distinct_ratio": 1.0,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.9,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "billing_address",
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"dtype": "string",
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"semantic_type": "text",
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"null_rate": 0.0,
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"distinct_count": 10000,
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"distinct_ratio": 1.0,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": false,
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"top_values": [],
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"pk_candidate_score": 0.9,
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"metric_candidate_score": 0.0,
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"comment": ""
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},
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{
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"name": "customer_segment",
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"dtype": "string",
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"semantic_type": "dimension",
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"null_rate": 0.0,
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"distinct_count": 3,
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"distinct_ratio": 0.0003,
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"stats": {"min": null, "max": null, "mean": null, "std": null, "skewness": null},
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"enumish": true,
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"top_values": [
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{"value": "New", "pct": null},
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{"value": "Returning", "pct": null},
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{"value": "VIP", "pct": null}
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],
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"pk_candidate_score": 0.0,
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"metric_candidate_score": 0.0,
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"comment": ""
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}
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],
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"primary_key_candidates": [["order_id"]],
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"fk_candidates": [
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{"from": "customer_id", "to": "dim_customer(customer_id)", "confidence": 0.9},
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{"from": "product_id", "to": "dim_product(product_id)", "confidence": 0.9}
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],
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"quality": {
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"failed_expectations": [],
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"warning_hints": []
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},
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"confidence_notes": [
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"表含时间列(order_date, shipping_date)且含度量列(price, quantity)，推断为fact表。",
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"order_id唯一性=1.0，确认主键。",
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"order_date日期范围连续无缺口，粒度为日级。",
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"高基数数值字段(price, quantity)符合指标特征。",
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"低熵字段(category, delivery_status, payment_method等)为枚举维度。"
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]
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}
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