{"id":20337,"date":"2024-01-02T04:30:22","date_gmt":"2024-01-02T04:30:22","guid":{"rendered":"https:\/\/server.hk\/blog\/20337\/"},"modified":"2024-11-14T10:40:12","modified_gmt":"2024-11-14T02:40:12","slug":"postgresql-command-update","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20337\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aUPDATE"},"content":{"rendered":"

PostgreSQL \u547d\u4ee4\uff1aUPDATE<\/h1>\n

PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u5ee3\u6cdb\u7684\u529f\u80fd\u548c\u80fd\u529b\u3002\u5176\u4e2d\u4e00\u500b\u95dc\u9375\u547d\u4ee4\u662f UPDATE \u547d\u4ee4\uff0c\u5b83\u5141\u8a31\u4f60\u4fee\u6539\u8868\u4e2d\u7684\u73fe\u6709\u6578\u64da\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u5c07\u8a73\u7d30\u63a2\u8a0e UPDATE \u547d\u4ee4\u53ca\u5176\u6709\u6548\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n

UPDATE \u547d\u4ee4\u7684\u8a9e\u6cd5<\/h2>\n

\u5728 PostgreSQL \u4e2d\uff0cUPDATE \u547d\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

UPDATE table_name\r\nSET column1 = value1, column2 = value2, ...\r\nWHERE condition;<\/code><\/pre>\n
table_name<\/code> \u6307\u5b9a\u4f60\u60f3\u8981\u66f4\u65b0\u7684\u8868\u540d\u7a31\u3002SET<\/code> \u5b50\u53e5\u7528\u4f86\u6307\u5b9a\u6b04\u4f4d\u53ca\u5176\u65b0\u503c\u3002\u4f60\u53ef\u4ee5\u540c\u6642\u66f4\u65b0\u591a\u500b\u6b04\u4f4d\uff0c\u4f7f\u7528\u9017\u865f\u5206\u9694\u5b83\u5011\u3002WHERE<\/code> \u5b50\u53e5\u662f\u53ef\u9078\u7684\uff0c\u5141\u8a31\u4f60\u6307\u5b9a\u689d\u4ef6\u4f86\u6c7a\u5b9a\u61c9\u66f4\u65b0\u54ea\u4e9b\u884c\u3002\u5982\u679c\u7701\u7565 WHERE<\/code> \u5b50\u53e5\uff0c\u8868\u4e2d\u7684\u6240\u6709\u884c\u90fd\u5c07\u88ab\u66f4\u65b0\u3002<\/p>\n
\u7bc4\u4f8b<\/h2>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba employees<\/code> \u7684\u8868\uff0c\u5176\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n
+----+----------+-----+\r\n| ID | Name     | Age |\r\n+----+----------+-----+\r\n| 1  | John     | 30  |\r\n| 2  | Jane     | 35  |\r\n| 3  | Michael  | 40  |\r\n+----+----------+-----+<\/code><\/pre>\n
\u7bc4\u4f8b 1\uff1a\u66f4\u65b0\u55ae\u4e00\u6b04\u4f4d<\/p>\n
UPDATE employees\r\nSET Age = 32\r\nWHERE ID = 1;<\/code><\/pre>\n
\u6b64\u67e5\u8a62\u5c07\u628a ID<\/code> \u70ba 1 \u7684\u54e1\u5de5\u7684 Age<\/code> \u6b04\u4f4d\u66f4\u65b0\u70ba 32\u3002<\/p>\n
\u7bc4\u4f8b 2\uff1a\u66f4\u65b0\u591a\u500b\u6b04\u4f4d<\/p>\n
UPDATE employees\r\nSET Name = 'Robert', Age = 38\r\nWHERE ID = 2;<\/code><\/pre>\n
\u6b64\u67e5\u8a62\u5c07\u628a ID<\/code> \u70ba 2 \u7684\u54e1\u5de5\u7684 Name<\/code> \u548c Age<\/code> \u6b04\u4f4d\u5206\u5225\u66f4\u65b0\u70ba ‘Robert’ \u548c 38\u3002<\/p>\n
\u7bc4\u4f8b 3\uff1a\u66f4\u65b0\u6240\u6709\u884c<\/p>\n
UPDATE employees\r\nSET Age = Age + 1;<\/code><\/pre>\n
\u6b64\u67e5\u8a62\u5c07\u628a\u6240\u6709\u54e1\u5de5\u7684 Age<\/code> \u6b04\u4f4d\u7684\u503c\u589e\u52a0 1\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL \u7684 UPDATE \u547d\u4ee4\u5141\u8a31\u4f60\u4fee\u6539\u8868\u4e2d\u7684\u73fe\u6709\u6578\u64da\u3002\u901a\u904e\u6307\u5b9a\u8868\u540d\u3001\u6b04\u4f4d\u53ca\u5176\u65b0\u503c\uff0c\u4f60\u53ef\u4ee5\u66f4\u65b0\u7279\u5b9a\u7684\u884c\u6216\u6574\u500b\u8868\u4e2d\u7684\u6240\u6709\u884c\u3002WHERE<\/code> \u5b50\u53e5\u70ba\u9078\u64c7\u6027\u66f4\u65b0\u884c\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\uff0c\u4f7f\u5176\u53ef\u4ee5\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u9032\u884c\u7be9\u9078\u3002PostgreSQL \u7684 UPDATE \u547d\u4ee4\u662f\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u5eab\u4e2d\u6578\u64da\u7684\u5f37\u5927\u5de5\u5177\u3002<\/p>\n
\u5982\u9700\u66f4\u591a\u6709\u95dc VPS \u4e3b\u6a5f\u670d\u52d9\u7684\u8cc7\u8a0a\uff0c\u5efa\u8b70\u67e5\u770b Server.HK<\/a>\u3002\u4ed6\u5011\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6027\u80fd\u7684 VPS \u89e3\u6c7a\u65b9\u6848\uff0c\u4ee5\u6eff\u8db3\u4f60\u7684\u7279\u5b9a\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PostgreSQL \u547d\u4ee4\uff1aUP...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20337","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20337","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=20337"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20337\/revisions"}],"predecessor-version":[{"id":24423,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20337\/revisions\/24423"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}