\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u8996\u5716\u662f\u4e00\u7a2e\u865b\u64ec\u8868\u683c\uff0c\u5b83\u4e26\u4e0d\u5132\u5b58\u6578\u64da\uff0c\u800c\u662f\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u57fa\u790e\u8868\u683c\u7684\u67e5\u8a62\u7d50\u679c\u3002Oracle\u6578\u64da\u5eab\u4e2d\u7684\u8996\u5716\u63d0\u4f9b\u4e86\u4e00\u7a2e\u65b9\u4fbf\u7684\u65b9\u5f0f\u4f86\u7c21\u5316\u6578\u64da\u7684\u67e5\u8a62\u548c\u7ba1\u7406\uff0c\u4e26\u4e14\u53ef\u4ee5\u7528\u4f86\u589e\u5f37\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u53ef\u7528\u6027\u3002<\/p>\n
\u8996\u5716\u7684\u4e3b\u8981\u529f\u80fd\u662f\u5c07\u8907\u96dc\u7684\u67e5\u8a62\u7d50\u679c\u5c01\u88dd\u6210\u4e00\u500b\u7c21\u55ae\u7684\u8868\u683c\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u50cf\u64cd\u4f5c\u666e\u901a\u8868\u683c\u4e00\u6a23\u4f86\u67e5\u8a62\u8996\u5716\u3002\u8996\u5716\u7684\u7279\u9ede\u5305\u62ec\uff1a<\/p>\n
\u5728Oracle\u4e2d\uff0c\u5275\u5efa\u8996\u5716\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
CREATE VIEW \u8996\u5716\u540d\u7a31 AS\nSELECT \u52171, \u52172, ...\nFROM \u57fa\u790e\u8868\u683c\nWHERE \u689d\u4ef6;<\/code><\/pre>\n\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cemployees\u201d\u7684\u8868\u683c\uff0c\u5305\u542b\u54e1\u5de5\u7684\u8a73\u7d30\u4fe1\u606f\u3002\u5982\u679c\u6211\u5011\u60f3\u5275\u5efa\u4e00\u500b\u53ea\u986f\u793a\u54e1\u5de5\u59d3\u540d\u548c\u85aa\u6c34\u7684\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n
CREATE VIEW employee_salary AS\nSELECT name, salary\nFROM employees;<\/code><\/pre>\n\u8996\u5716\u7684\u4f7f\u7528<\/h2>\n
\u5275\u5efa\u8996\u5716\u5f8c\uff0c\u7528\u6236\u53ef\u4ee5\u50cf\u67e5\u8a62\u666e\u901a\u8868\u683c\u4e00\u6a23\u67e5\u8a62\u8996\u5716\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM employee_salary;<\/code><\/pre>\n\u9019\u5c07\u8fd4\u56de\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\u548c\u85aa\u6c34\u3002\u8996\u5716\u4e5f\u53ef\u4ee5\u8207\u5176\u4ed6SQL\u8a9e\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4f8b\u5982JOIN\u3001ORDER BY\u7b49\u3002<\/p>\n
\u66f4\u65b0\u8996\u5716<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u8996\u5716\u662f\u53ef\u66f4\u65b0\u7684\uff0c\u9019\u610f\u5473\u8457\u7528\u6236\u53ef\u4ee5\u901a\u904e\u8996\u5716\u4f86\u4fee\u6539\u57fa\u790e\u8868\u683c\u4e2d\u7684\u6578\u64da\u3002\u8981\u4f7f\u8996\u5716\u53ef\u66f4\u65b0\uff0c\u5fc5\u9808\u6eff\u8db3\u4e00\u4e9b\u689d\u4ef6\uff0c\u4f8b\u5982\u8996\u5716\u5fc5\u9808\u57fa\u65bc\u55ae\u4e00\u8868\u683c\uff0c\u4e26\u4e14\u4e0d\u5305\u542b\u805a\u5408\u51fd\u6578\u6216GROUP BY\u5b50\u53e5\u3002<\/p>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u901a\u904e\u201cemployee_salary\u201d\u8996\u5716\u66f4\u65b0\u54e1\u5de5\u7684\u85aa\u6c34\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n
UPDATE employee_salary\nSET salary = salary * 1.1\nWHERE name = 'John Doe';<\/code><\/pre>\n\u522a\u9664\u8996\u5716<\/h2>\n
\u5982\u679c\u4e0d\u518d\u9700\u8981\u67d0\u500b\u8996\u5716\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u522a\u9664\u5b83\uff1a<\/p>\n
DROP VIEW \u8996\u5716\u540d\u7a31;<\/code><\/pre>\n\u4f8b\u5982\uff0c\u522a\u9664\u201cemployee_salary\u201d\u8996\u5716\u7684\u8a9e\u53e5\u70ba\uff1a<\/p>\n
DROP VIEW employee_salary;<\/code><\/pre>\n\u7e3d\u7d50<\/h2>\n
Oracle\u8996\u5716\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u7c21\u5316\u6578\u64da\u67e5\u8a62\u3001\u589e\u5f37\u6578\u64da\u5b89\u5168\u6027\u4ee5\u53ca\u63d0\u9ad8\u6578\u64da\u7ba1\u7406\u7684\u9748\u6d3b\u6027\u3002\u901a\u904e\u5275\u5efa\u548c\u4f7f\u7528\u8996\u5716\uff0c\u7528\u6236\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u64cd\u4f5c\u6578\u64da\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u66f4\u65b0\u548c\u522a\u9664\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u4e86\u89e3\u548c\u638c\u63e1\u8996\u5716\u7684\u4f7f\u7528\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bcVPS\u3001\u9999\u6e2fVPS<\/a>\u3001\u670d\u52a1\u5668<\/a>\u6216\u5176\u4ed6\u96f2\u670d\u52d9\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u4e86\u89e3Oracle\u8996\u5716\u7684\u57fa\u672c\u6982\u5ff5\u53ca\u5176\u5275\u5efa\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u64cd\u4f5c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-195415","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=195415"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195415\/revisions"}],"predecessor-version":[{"id":195416,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/195415\/revisions\/195416"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=195415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=195415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=195415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}