{"id":309,"date":"2022-04-01T14:25:22","date_gmt":"2022-04-01T06:25:22","guid":{"rendered":"https:\/\/www.tianjm.cn\/?p=309"},"modified":"2022-04-01T16:22:53","modified_gmt":"2022-04-01T08:22:53","slug":"oracle-b%e8%a1%a8%e5%bf%ab%e9%80%9f%e6%9b%b4%e6%96%b0a%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/www.tianjm.cn\/?p=309","title":{"rendered":"Oracle  B\u8868\u5feb\u901f\u66f4\u65b0A\u8868"},"content":{"rendered":"\n<p>B\u8868\u548cA\u8868\u662f\u76f8\u540c\u7ed3\u6784\u7684\u8868\uff0cA\u8868\u7531\u4e8e\u6709\u4e3b\u5916\u952e\u7684\u5173\u7cfb\uff0c\u6ca1\u529e\u6cd5\u76f4\u63a5\u5220\u9664\u540e\uff0c\u6279\u91cf\u4eceB\u8868\u63d2\u5165\uff0c\u5c31\u9700\u8981\u901a\u8fc7inset \u52a0\u4e0a update\u7684\u65b9\u5f0f\u6765\u66f4\u65b0A\u8868\uff0c\u4f20\u7edf\u7684\u65b9\u5f0f\uff0c\u662f\u6839\u636eB\u8868\u7684ID\u548cA\u8868\u5173\u8054\uff0c\u7136\u540e\u66f4\u65b0\u503c\u3002<\/p>\n\n\n\n<p>\u4e0b\u9762\u4f8b\u5b50\u8bf4\u660e\uff0c\u4f20\u7edf\u7684B\u8868\u66f4\u65b0\u6570\u636e\u7ed9A\u8868<\/p>\n\n\n\n<p>\u4f20\u7edf\u66f4\u65b0\uff1aupdate a set a.value = (select b.value from b where a.id = b.id)<\/p>\n\n\n\n<p>\u4f20\u7edf\u65b0\u589e\uff1a<\/p>\n\n\n\n<p>\u4e0b\u9762\u4ecb\u7ecd\u901a\u8fc7merge\u7684\u65b9\u5f0f\u5feb\u901f\u66f4\u65b0\u548c\u63d2\u5165<\/p>\n\n\n\n<div class=\"wp-block-group is-layout-flow\"><div class=\"wp-block-group__inner-container\">\n<p>merge into a using\uff08select b.id,b.value from b) c on (a.id = c.id)<\/p>\n\n\n\n<p>when matched then<\/p>\n\n\n\n<p>update set a.value = c.value<\/p>\n\n\n\n<p>when not matched then<\/p>\n\n\n\n<p>insert(a.id,a.value)values(c.id,c.value)<\/p>\n<\/div><\/div>\n\n\n\n<p>\u4ee5\u4e0b\u662f\u4f8b\u5b50\uff0c\u5148\u521b\u5efatable1\u548ctable2\uff0c\u7528table2\u8986\u76d6table1<\/p>\n\n\n\n<p>table1\u7684\u6570\u636e<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"86\" height=\"99\" src=\"https:\/\/www.tianjm.cn\/wp-content\/uploads\/2022\/04\/image.png\" alt=\"\" class=\"wp-image-314\"\/><\/figure>\n\n\n\n<p>table2\u7684\u6570\u636e<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"82\" height=\"118\" src=\"https:\/\/www.tianjm.cn\/wp-content\/uploads\/2022\/04\/image-1.png\" alt=\"\" class=\"wp-image-315\"\/><\/figure>\n\n\n\n<p>\u8986\u76d6\u540e\u7684\u7ed3\u679c\uff0c\u5e94\u8be5\u662ftable1\u7684\u6570\u636e\u548ctable2\u4e00\u6837\uff0c\u6267\u884c\u5408\u5e76<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"531\" height=\"82\" src=\"https:\/\/www.tianjm.cn\/wp-content\/uploads\/2022\/04\/image-2.png\" alt=\"\" class=\"wp-image-316\" srcset=\"https:\/\/www.tianjm.cn\/wp-content\/uploads\/2022\/04\/image-2.png 531w, https:\/\/www.tianjm.cn\/wp-content\/uploads\/2022\/04\/image-2-300x46.png 300w\" sizes=\"(max-width: 531px) 100vw, 531px\" \/><\/figure>\n\n\n\n<p>table1\u6570\u636e<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>ID<\/th><th>NAME<\/th><\/tr><tr><td>1<\/td><td>C<\/td><\/tr><tr><td>3<\/td><td>E<\/td><\/tr><tr><td>2<\/td><td>D<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>table2\u6570\u636e<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th>ID<\/th><th>NAME<\/th><\/tr><tr><td>1<\/td><td>C<\/td><\/tr><tr><td>2<\/td><td>D<\/td><\/tr><tr><td>3<\/td><td>E<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\uff0cid\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0ctable2\u7684\u6570\u636e\u66ff\u6362\u4e86table1,<\/p>\n\n\n\n<p>table2\u6ca1\u6709\u627e\u5230table1\u7684id\u60c5\u51b5\u4e0b\uff0ctable2\u65b0\u589e\u4e86\u4e00\u6761\u6570\u636e\u7ed9table1<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u8868\u548cA\u8868\u662f\u76f8\u540c\u7ed3\u6784\u7684\u8868\uff0cA\u8868\u7531\u4e8e\u6709\u4e3b\u5916\u952e\u7684\u5173\u7cfb\uff0c\u6ca1\u529e\u6cd5\u76f4\u63a5\u5220\u9664\u540e\uff0c&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[8],"tags":[],"_links":{"self":[{"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/posts\/309"}],"collection":[{"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=309"}],"version-history":[{"count":5,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions"}],"predecessor-version":[{"id":318,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=\/wp\/v2\/posts\/309\/revisions\/318"}],"wp:attachment":[{"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tianjm.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}