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sql - 在 SQL 中将字典拆分为多列

问题描述

从 API 获取的数据返回存储在列中的字典格式，如下所示：

{"messaging": true, "newsletters": true, "ranking_coach": true, "sms_reminders": true, "birthday_reminders": true, "merchant_shiftplan": true}
{"messaging": false, "yext_sync": false, "marketplace": false, "newsletters": false, "ranking_coach": false, "sms_reminders": false, "sms_newsletters": false, "merchant_payment": true, "customer_feedback": true, "birthday_reminders": false, "merchant_dashboard": true, "merchant_shiftplan": false, "reserve_with_google": false, "sms_customer_confirmation": false, "individual_email_from_name": true, "appointment_location_customer": false}
{"messaging": false, "yext_sync": false, "marketplace": false, "newsletters": false, "ranking_coach": false, "sms_reminders": false, "sms_newsletters": false, "merchant_payment": true, "customer_feedback": true, "birthday_reminders": false, "merchant_dashboard": true, "merchant_shiftplan": false, "reserve_with_google": false, "sms_customer_confirmation": false, "individual_email_from_name": true, "appointment_location_customer": false}
{"messaging": false, "newsletters": false, "merchant_payment": false, "birthday_reminders": false, "merchant_shiftplan": false, "double_opt_in_required": false}
{"messaging": false, "yext_sync": false, "marketplace": false, "newsletters": false, "ranking_coach": false, "sms_reminders": false, "sms_newsletters": false, "merchant_payment": true, "customer_feedback": true, "birthday_reminders": false, "merchant_dashboard": true, "merchant_shiftplan": false, "reserve_with_google": false, "sms_customer_confirmation": false, "individual_email_from_name": true, "appointment_location_customer": false}
{"square": false, "insights": true, "api_token": false, "messaging": true, "wait_list": false, "yext_sync": false, "marketplace": false, "newsletters": true, "pdf_prefill": false, "free_product": false, "website_duda": false, "ranking_coach": false, "sms_reminders": true, "contact_widget": false, "online_booking": true, "sms_newsletters": false, "merchant_payment": false, "shared_customers": false, "customer_feedback": true, "external_services": false, "birthday_reminders": true, "merchant_dashboard": true, "merchant_shiftplan": false, "net_promoter_score": false, "new_booking_widget": true, "reserve_with_google": false, "file_download_widget": false, "automated_newsletters": true, "double_opt_in_required": false, "sms_customer_confirmation": false, "individual_email_from_name": false, "new_closingtime_background": false, "gdpr_marketing_opt_in_modal": false, "appointment_location_customer": false, "facebook_instagram_integration": false, "new_full_screen_booking_widget": true, "merchant_logo_on_customer_email": true, "show_all_branch_option_on_insights": false, "participating_account_notifications": false, "show_newsletter_non_subscriber_selection": false}
{"reporting": true, "newsletters": false, "merchant_payment": false, "customer_feedback": true, "reserve_with_google": true, "new_closingtime_background": true, "merchant_logo_on_customer_email": true}
{"messaging": false, "yext_sync": false, "marketplace": false, "newsletters": false, "ranking_coach": false, "sms_reminders": false, "sms_newsletters": false, "merchant_payment": true, "customer_feedback": true, "birthday_reminders": false, "merchant_dashboard": true, "merchant_shiftplan": false, "reserve_with_google": false, "sms_customer_confirmation": false, "individual_email_from_name": true, "appointment_location_customer": false}
{"messaging": false, "newsletters": false, "merchant_payment": false, "birthday_reminders": false, "merchant_shiftplan": false, "double_opt_in_required": false, "new_closingtime_background": true, "facebook_instagram_integration": true, "show_all_branch_option_on_insights": true, "show_newsletter_non_subscriber_selection": false}
{"sms_reminders": true, "customer_feedback": true, "merchant_dashboard": true, "reserve_with_google": false, "show_all_branch_option_on_insights": true}

值得注意的一点是，并非所有行都具有相同的特征。例如，第 1 行到第 5 行以消息开头，第 6 行以正方形开头，第 7 行以报告开头。

我想将这一列拆分为多列，其中每列只有 1 个功能。

预期输出：

No. messaging   newsletter    ranking_coach   sms_reminders
1     true        true            true             true
2     false       null            null             null
3     false       null            null             null
..
6     null        null            null             null

标签： sqlpostgresql

解决方案

您可以在 postgresql 中使用 json 功能：

select
    Jsoncol ->> 'messaging' messaging,
    Jsoncol ->> 'newsletters' newsletters,
    Jsoncol ->> 'ranking_coach' ranking_coach,
    Jsoncol ->> 'sms_reminders' sms_reminders
from tablename

db<>在这里摆弄

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