{"id":26368,"date":"2024-11-24T15:03:52","date_gmt":"2024-11-24T07:03:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/26368\/"},"modified":"2024-11-24T15:03:52","modified_gmt":"2024-11-24T07:03:52","slug":"sql%e4%bc%98%e5%8c%96%ef%bc%9a%e5%a6%82%e4%bd%95%e4%bc%98%e5%8c%96%e5%8c%85%e5%90%ab%e5%ad%90%e6%9f%a5%e8%af%a2%e7%9a%84%e6%9f%a5%e8%af%a2%e8%af%ad%e5%8f%a5%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/26368\/","title":{"rendered":"SQL\u4f18\u5316\uff1a\u5982\u4f55\u4f18\u5316\u5305\u542b\u5b50\u67e5\u8be2\u7684\u67e5\u8be2\u8bed\u53e5\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173089728534512.jpg\" class=\"aligncenter\" title=\"SQL\u4f18\u5316\uff1a\u5982\u4f55\u4f18\u5316\u5305\u542b\u5b50\u67e5\u8be2\u7684\u67e5\u8be2\u8bed\u53e5\uff1f\u63d2\u56fe\" alt=\"SQL\u4f18\u5316\uff1a\u5982\u4f55\u4f18\u5316\u5305\u542b\u5b50\u67e5\u8be2\u7684\u67e5\u8be2\u8bed\u53e5\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\uff1a\u5982\u4f55\u4f18\u5316\u6b64\u67e5\u8be2\uff1f<\/strong><\/p>\n<p>\u539f\u67e5\u8be2\u5982\u4e0b\uff1a<\/p>\n<pre>select\n    es.id,\n    es.station_name,\n    es.province,\n    es.city,\n    es.district,\n    es.detailed,\n    ( select count(*) from air_conditioner_equipment where station_id = es.id ) as air_conditioning_count,\n    ( select sum( cold_power ) from air_conditioner_equipment where station_id = es.id) as cold_power_total,\n    ( select sum( hot_power) from air_conditioner_equipment where station_id = es.id) as hot_power_total,\n    es.create_time,\n    es.state\nfrom\n    energy_station es\nleft join user_station us on us.station_id = es.id\nleft join user_info u on u.id = us.user_id<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f18\u5316\u5efa\u8bae\uff1a<\/p>\n<ul>\n<li>\u4e3ar_conditioner_equipment\u8868\u7684station_id\u5217\u6dfb\u52a0\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u6dfb\u52a0\u7d22\u5f15\uff0c\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u67e5\u627e\u6570\u636e\uff0c\u4ece\u800c\u63d0\u9ad8\u67e5\u8be2\u901f\u5ea6\u3002<\/p>\n<p>\u4f18\u5316\u540e\u7684\u67e5\u8be2\uff1a<\/p>\n<pre>SELECT\n    es.id,\n    es.station_name,\n    es.province,\n    es.city,\n    es.district,\n    es.detailed,\n    SUM(ace.air_conditioning_count) AS air_conditioning_count,\n    SUM(ace.cold_power) AS cold_power_total,\n    SUM(ace.hot_power) AS hot_power_total,\n    es.create_time,\n    es.state\nFROM energy_station es\nLEFT JOIN user_station us ON us.station_id = es.id\nLEFT JOIN user_info u ON u.id = us.user_id\nLEFT JOIN (\n      SELECT  station_id, COUNT(*) as air_conditioning_count, SUM(cold_power) as cold_power, SUM(hot_power) as hot_power\n      FROM air_conditioner_equipment\n      GROUP BY station_id\n) ace ON ace.station_id = es.id\nGROUP BY es.id;<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fSQL\u4f18\u5316\uff1a\u5982\u4f55\u4f18\u5316\u5305\u542b\u5b50\u67e5\u8be2\u7684\u67e5\u8be2\u8bed\u53e5\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\uff1a\u5982\u4f55\u4f18\u5316\u6b64\u67e5\u8be2\uff1f \u539f\u67e5\u8be2\u5982\u4e0b\uff1a select es.id, es.station_name, es.province, es.city, es.district, es.detailed, ( select count(*) from air_conditioner_equipment where station_id = es.id ) as air_conditioning_count, ( select sum( cold_power ) from air_conditioner_equipment where station_id = es.id) as cold_power_total, ( select sum( hot_power) from air_conditioner_equipment where station_id = es.id) as hot_power_total, es.create_time, es.state from energy_station es left join user_station us [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-26368","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26368","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=26368"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/26368\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=26368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=26368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=26368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}