{"id":15728,"date":"2023-12-04T22:06:00","date_gmt":"2023-12-04T14:06:00","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=15728"},"modified":"2023-12-04T22:07:01","modified_gmt":"2023-12-04T14:07:01","slug":"oracle-zhong-bi-mian-suo-yin-shi-xiao-de-zhu-yi-sh","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/04\/oracle-zhong-bi-mian-suo-yin-shi-xiao-de-zhu-yi-sh\/","title":{"rendered":"Oracle \u4e2d\u907f\u514d\u7d22\u5f15\u5931\u6548\u7684\u6ce8\u610f\u4e8b\u9879\uff1f"},"content":{"rendered":"

\u786e\u4fdd\u7d22\u5f15\u7684\u6709\u6548\u4f7f\u7528\u662f\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u3002\u907f\u514d\u7d22\u5f15\u5931\u6548\u7684\u4e00\u4e9b\u5e38\u89c1\u6ce8\u610f\u4e8b\u9879\u5305\u62ec\uff1a<\/p>\n

    \n
  1. \n\u907f\u514d\u5728\u7d22\u5f15\u5217\u4e0a\u8fdb\u884c\u51fd\u6570\u64cd\u4f5c\uff1a<\/strong> \u5f53\u5728\u7d22\u5f15\u5217\u4e0a\u5e94\u7528\u51fd\u6570\u65f6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff0c\u56e0\u4e3a\u6570\u636e\u5e93\u65e0\u6cd5\u5229\u7528\u7d22\u5f15\u5bf9\u51fd\u6570\u7ed3\u679c\u8fdb\u884c\u4f18\u5316\u3002\u5c3d\u91cf\u907f\u514d\u5728 WHERE<\/code> \u6761\u4ef6\u4e2d\u5bf9\u7d22\u5f15\u5217\u4f7f\u7528\u51fd\u6570\u3002\n<\/li>\n
  2. \n\u6ce8\u610f NULL \u503c\u5904\u7406\uff1a<\/strong> \u5982\u679c\u7d22\u5f15\u5217\u5305\u542b\u5927\u91cf\u7684 NULL \u503c\uff0c\u5e76\u4e14\u67e5\u8be2\u4e2d\u4f7f\u7528\u4e86 IS NULL<\/code> \u6216 IS NOT NULL<\/code> \u6761\u4ef6\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u3002\u5728\u9700\u8981\u65f6\u786e\u4fdd NULL \u503c\u4e0d\u4f1a\u5f71\u54cd\u7d22\u5f15\u7684\u9009\u62e9\u6027\u3002\n<\/li>\n
  3. \n\u907f\u514d\u5bf9\u7d22\u5f15\u5217\u8fdb\u884c\u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\uff1a<\/strong> \u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u4e86\u4e0d\u540c\u7c7b\u578b\u7684\u5217\u8fdb\u884c\u6bd4\u8f83\u65f6\uff0c\u6570\u636e\u5e93\u53ef\u80fd\u4f1a\u8fdb\u884c\u9690\u5f0f\u7684\u7c7b\u578b\u8f6c\u6362\u3002\u8fd9\u6837\u505a\u53ef\u80fd\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff0c\u56e0\u4e3a\u6570\u636e\u5e93\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u5bf9\u8f6c\u6362\u540e\u7684\u503c\u8fdb\u884c\u5339\u914d\u3002\n<\/li>\n
  4. \n\u5c0f\u5fc3\u4f7f\u7528\u901a\u914d\u7b26\u67e5\u8be2\uff08%\uff09\uff1a<\/strong> \u5728 LIKE<\/code> \u5b50\u53e5\u4e2d\u4f7f\u7528 %<\/code> \u901a\u914d\u7b26\u53ef\u80fd\u4f1a\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\uff0c\u56e0\u4e3a\u5b83\u4e0d\u5229\u4e8e\u7d22\u5f15\u7684\u4f18\u5316\u3002\u5c3d\u91cf\u907f\u514d\u5728\u67e5\u8be2\u4e2d\u9891\u7e41\u4f7f\u7528\u901a\u914d\u7b26\u5f00\u5934\u7684\u6a21\u7cca\u67e5\u8be2\u3002\n<\/li>\n
  5. \n\u6ce8\u610f\u67e5\u8be2\u4e2d\u7684\u5217\u987a\u5e8f\uff1a<\/strong> \u5728\u591a\u5217\u7d22\u5f15\u4e2d\uff0c\u67e5\u8be2\u7684\u5217\u987a\u5e8f\u5e94\u8be5\u4e0e\u7d22\u5f15\u7684\u5217\u987a\u5e8f\u4e00\u81f4\u6216\u6700\u5de6\u4fa7\u7684\u5217\u987a\u5e8f\u4e00\u81f4\uff0c\u8fd9\u6837\u624d\u80fd\u66f4\u6709\u6548\u5730\u4f7f\u7528\u7d22\u5f15\u3002\n<\/li>\n
  6. \n\u907f\u514d\u9891\u7e41\u7684 DML \u64cd\u4f5c\uff1a<\/strong> \u5bf9\u4e8e\u9891\u7e41\u8fdb\u884c\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u7684\u8868\uff0c\u53ef\u80fd\u5bfc\u81f4\u7d22\u5f15\u5931\u6548\u6216\u7d22\u5f15\u4e0d\u518d\u662f\u6700\u4f18\u9009\u62e9\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u5e2e\u52a9\u6062\u590d\u7d22\u5f15\u7684\u6027\u80fd\u3002\n<\/li>\n
  7. \n\u7edf\u8ba1\u4fe1\u606f\u7684\u66f4\u65b0\uff1a<\/strong> \u786e\u4fdd\u6570\u636e\u5e93\u7684\u7edf\u8ba1\u4fe1\u606f\u662f\u6700\u65b0\u7684\uff0c\u8fd9\u6709\u52a9\u4e8e\u4f18\u5316\u67e5\u8be2\u8ba1\u5212\u7684\u9009\u62e9\uff0c\u907f\u514d\u7d22\u5f15\u5931\u6548\u3002\n<\/li>\n<\/ol>\n

    \u7efc\u5408\u6765\u8bf4\uff0c\u4e86\u89e3\u67e5\u8be2\u4f18\u5316\u5668\u7684\u884c\u4e3a\u5e76\u907f\u514d\u4e0a\u8ff0\u60c5\u51b5\u7684\u53d1\u751f\u53ef\u4ee5\u6709\u6548\u5730\u907f\u514d\u7d22\u5f15\u5931\u6548\uff0c\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u786e\u4fdd\u7d22\u5f15\u7684\u6709\u6548\u4f7f\u7528\u662f\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u3002\u907f\u514d\u7d22\u5f15\u5931\u6548\u7684\u4e00\u4e9b\u5e38\u89c1\u6ce8\u610f\u4e8b\u9879\u5305\u62ec\uff1a \u907f\u514d\u5728\u7d22\u5f15\u5217\u4e0a\u8fdb\u884c\u51fd\u6570\u64cd\u4f5c\uff1a \u5f53 […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-15728","post","type-post","status-publish","format-standard","hentry","category-oracel"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15728","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=15728"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15728\/revisions"}],"predecessor-version":[{"id":15729,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/15728\/revisions\/15729"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=15728"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=15728"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=15728"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}