本页介绍了为连接到 BigQuery 数据的 Conversational Analytics API 数据代理编写有效提示的推荐结构。您可以使用 system_instruction 参数编写字符串形式的上下文，来定义这些提示。
系统指令关键组成部分的示例
以下部分包含 BigQuery 中系统指令的关键组成部分示例。这些键包括：
tablesfieldsmeasuresgolden_queriesgolden_action_plansrelationshipsglossariesadditional_descriptions
如需了解这些关键组成部分的说明，请参阅使用编写的上下文引导代理行为文档页面。
使用 tables 描述数据
以下 YAML 代码块显示了表 bigquery-public-data.thelook_ecommerce.orders 的 tables 键的基本结构：
- tables:
- table:
- name: bigquery-public-data.thelook_ecommerce.orders
- description: Data for customer orders in The Look fictitious e-commerce store.
- synonyms:
- sales
- orders_data
- tags:
- ecommerce
- transaction
使用 fields 描述常用字段
以下 YAML 代码示例描述了 orders 表的关键字段，例如 order_id、status、created_at、num_of_items 和 earnings：
- tables:
- table:
- name: bigquery-public-data.thelook_ecommerce.orders
- fields:
- field:
- name: order_id
- description: The unique identifier for each customer order.
- field:
- name: user_id
- description: The unique identifier for each customer.
- field:
- name: status
- description: The current status of the order.
- sample_values:
- complete
- shipped
- returned
- field:
- name: created_at
- description: The timestamp when the order was created.
- field:
- name: num_of_items
- description: The total number of items in the order.
- aggregations:
- sum
- avg
- field:
- name: earnings
- description: The sales amount for the order.
- aggregations:
- sum
- avg
使用 measures 定义业务指标
例如，您可以将 profit 指标定义为收入减去费用的计算结果，如下所示：
- tables:
- table:
- name: bigquery-public-data.thelook_ecommerce.orders
- measures:
- measure:
- name: profit
- description: Raw profit (earnings minus cost).
- exp: earnings - cost
- synonyms: gains
通过 golden_queries 提高准确性
例如，您可以按如下方式为 orders 表中的数据定义常见分析的黄金查询：
- tables:
- table:
- golden_queries:
- golden_query:
- natural_language_query: How many orders are there?
- sql_query: SELECT COUNT(*) FROM sqlgen-testing.thelook_ecommerce.orders
- golden_query:
- natural_language_query: How many orders were shipped?
- sql_query: >-
SELECT COUNT(*) FROM sqlgen-testing.thelook_ecommerce.orders
WHERE status = 'shipped'
使用 golden_action_plans 概述多步任务
例如，您可以定义一个操作方案，用于按年龄段显示订单细分，并包含有关 SQL 查询和可视化相关步骤的详细信息：
- tables:
- table:
- golden_action_plans:
- golden_action_plan:
- natural_language_query: Show me the number of orders broken down by age group.
- action_plan:
- step: >-
Run a SQL query that joins the table
sqlgen-testing.thelook_ecommerce.orders and
sqlgen-testing.thelook_ecommerce.users to get a
breakdown of order count by age group.
- step: >-
Create a vertical bar plot using the retrieved data,
with one bar per age group.
使用 relationships 定义表联接
例如，您可以按如下方式定义 bigquery-public-data.thelook_ecommerce.orders 表与 bigquery-public-data.thelook_ecommerce.users 表之间的 orders_to_user 关系：
- relationships:
- relationship:
- name: orders_to_user
- description: >-
Connects customer order data to user information with the user_id and id fields to allow an aggregated view of sales by customer demographics.
- relationship_type: many-to-one
- join_type: left
- left_table: bigquery-public-data.thelook_ecommerce.orders
- right_table: bigquery-public-data.thelook_ecommerce.users
- relationship_columns:
- left_column: user_id
- right_column: id
通过 glossaries 解释业务术语
例如，您可以根据具体的业务背景信息，按如下方式定义常见业务状态和“OMPF”等术语：
- glossaries:
- glossary:
- term: complete
- description: Represents an order status where the order has been completed.
- synonyms: 'finish, done, fulfilled'
- glossary:
- term: shipped
- description: Represents an order status where the order has been shipped to the customer.
- glossary:
- term: returned
- description: Represents an order status where the customer has returned the order.
- glossary:
- term: OMPF
- description: Order Management and Product Fulfillment
通过 additional_descriptions 添加更多说明
例如，您可以使用 additional_descriptions 键提供有关您组织的信息，如下所示：
- additional_descriptions:
- text: All the sales data pertains to The Look, a fictitious ecommerce store.
- text: 'Orders can be of three categories: food, clothes, and electronics.'
示例：BigQuery 中的系统指令
以下示例展示了虚构的销售分析师代理的示例系统指令，如下所示：
- system_instruction: >-
You are an expert sales analyst for a fictitious ecommerce store. You will answer questions about sales, orders, and customer data. Your responses should be concise and data-driven.
- tables:
- table:
- name: bigquery-public-data.thelook_ecommerce.orders
- description: Data for orders in The Look, a fictitious ecommerce store.
- synonyms: sales
- tags: 'sale, order, sales_order'
- fields:
- field:
- name: order_id
- description: The unique identifier for each customer order.
- field:
- name: user_id
- description: The unique identifier for each customer.
- field:
- name: status
- description: The current status of the order.
- sample_values:
- complete
- shipped
- returned
- field:
- name: created_at
- description: >-
The date and time at which the order was created in timestamp
format.
- field:
- name: returned_at
- description: >-
The date and time at which the order was returned in timestamp
format.
- field:
- name: num_of_items
- description: The total number of items in the order.
- aggregations: 'sum, avg'
- field:
- name: earnings
- description: The sales revenue for the order.
- aggregations: 'sum, avg'
- field:
- name: cost
- description: The cost for the items in the order.
- aggregations: 'sum, avg'
- measures:
- measure:
- name: profit
- description: Raw profit (earnings minus cost).
- exp: earnings - cost
- synonyms: gains
- golden_queries:
- golden_query:
- natural_language_query: How many orders are there?
- sql_query: SELECT COUNT(*) FROM sqlgen-testing.thelook_ecommerce.orders
- golden_query:
- natural_language_query: How many orders were shipped?
- sql_query: >-
SELECT COUNT(*) FROM sqlgen-testing.thelook_ecommerce.orders
WHERE status = 'shipped'
- golden_action_plans:
- golden_action_plan:
- natural_language_query: Show me the number of orders broken down by age group.
- action_plan:
- step: >-
Run a SQL query that joins the table
sqlgen-testing.thelook_ecommerce.orders and
sqlgen-testing.thelook_ecommerce.users to get a
breakdown of order count by age group.
- step: >-
Create a vertical bar plot using the retrieved data,
with one bar per age group.
- table:
- name: bigquery-public-data.thelook_ecommerce.users
- description: Data for users in The Look, a fictitious ecommerce store.
- synonyms: customers
- tags: 'user, customer, buyer'
- fields:
- field:
- name: id
- description: The unique identifier for each user.
- field:
- name: first_name
- description: The first name of the user.
- tag: person
- sample_values: 'alex, izumi, nur'
- field:
- name: last_name
- description: The first name of the user.
- tag: person
- sample_values: 'warmer, stilles, smith'
- field:
- name: age_group
- description: The age demographic group of the user.
- sample_values:
- 18-24
- 25-34
- 35-49
- 50+
- field:
- name: email
- description: The email address of the user.
- tag: contact
- sample_values: '222larabrown@gmail.com, cloudysanfrancisco@gmail.com'
- golden_queries:
- golden_query:
- natural_language_query: How many unique customers are there?
- sql_query: >-
SELECT COUNT(DISTINCT id) FROM
bigquery-public-data.thelook_ecommerce.users
- golden_query:
- natural_language_query: How many users in the 25-34 age group have a cymbalgroup email address?
- sql_query: >-
SELECT COUNT(DISTINCT id) FROM
bigquery-public-data.thelook_ecommerce.users WHERE users.age_group =
'25-34' AND users.email LIKE '%@cymbalgroup.com';
- relationships:
- relationship:
- name: orders_to_user
- description: >-
Connects customer order data to user information with the user_id and id fields to allow an aggregated view of sales by customer demographics.
- relationship_type: many-to-one
- join_type: left
- left_table: bigquery-public-data.thelook_ecommerce.orders
- right_table: bigquery-public-data.thelook_ecommerce.users
- relationship_columns:
- left_column: user_id
- right_column: id
- glossaries:
- glossary:
- term: complete
- description: Represents an order status where the order has been completed.
- synonyms: 'finish, done, fulfilled'
- glossary:
- term: shipped
- description: Represents an order status where the order has been shipped to the customer.
- glossary:
- term: returned
- description: Represents an order status where the customer has returned the order.
- glossary:
- term: OMPF
- description: Order Management and Product Fulfillment
- additional_descriptions:
- text: All the sales data pertains to The Look, a fictitious ecommerce store.
- text: 'Orders can be of three categories: food, clothes, and electronics.'