{"id":20371,"date":"2024-01-02T05:04:23","date_gmt":"2024-01-02T05:04:23","guid":{"rendered":"https:\/\/server.hk\/blog\/20371\/"},"modified":"2024-11-14T10:39:37","modified_gmt":"2024-11-14T02:39:37","slug":"postgresql-command-grant","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20371\/","title":{"rendered":"PostgreSQL \u547d\u4ee4\uff1aBEGIN"},"content":{"rendered":"

PostgreSQL \u547d\u4ee4\uff1aBEGIN<\/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\u591a\u7a2e\u529f\u80fd\u548c\u80fd\u529b\u3002BEGIN<\/code> \u662f PostgreSQL \u4e2d\u7684\u57fa\u672c\u547d\u4ee4\u4e4b\u4e00\uff0c\u7528\u65bc\u958b\u59cb\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u4e8b\u52d9\uff1f<\/h2>\n

\u5728\u6578\u64da\u5eab\u7684\u80cc\u666f\u4e0b\uff0c\u4e8b\u52d9\u662f\u4e00\u7cfb\u5217\u88ab\u8996\u70ba\u4e00\u500b\u5de5\u4f5c\u55ae\u5143\u7684\u64cd\u4f5c\u3002\u9019\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u5305\u62ec\u5411\u6578\u64da\u5eab\u63d2\u5165\u3001\u66f4\u65b0\u6216\u522a\u9664\u6578\u64da\u3002\u4e8b\u52d9\u7684\u76ee\u7684\u662f\u4fdd\u8b49\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n

\u7576\u4e8b\u52d9\u958b\u59cb\u6642\uff0cPostgreSQL \u6703\u5275\u5efa\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u5340\u584a\uff0c\u5141\u8a31\u5c07\u591a\u500b\u64cd\u4f5c\u7d44\u5408\u5728\u4e00\u8d77\u3002\u9019\u500b\u5340\u584a\u6703\u4fdd\u6301\u6d3b\u52d5\u72c0\u614b\uff0c\u76f4\u5230\u4e8b\u52d9\u88ab\u63d0\u4ea4\u6216\u56de\u6efe\u70ba\u6b62\u3002<\/p>\n

\u4f7f\u7528 BEGIN \u547d\u4ee4<\/h2>\n

BEGIN<\/code> \u547d\u4ee4\u7528\u65bc\u5728 PostgreSQL \u4e2d\u958b\u59cb\u4e00\u500b\u65b0\u7684\u4e8b\u52d9\u3002\u901a\u5e38\u5b83\u5f8c\u9762\u6703\u8ddf\u96a8\u4e00\u7cfb\u5217\u7d44\u6210\u4e8b\u52d9\u7684 SQL \u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff1a<\/p>\n

BEGIN;\r\nINSERT INTO customers (name, email) VALUES ('John Doe', 'john@example.com');\r\nUPDATE orders SET status = 'completed' WHERE customer_id = 1;\r\nCOMMIT;\r\n<\/code><\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 BEGIN<\/code> \u547d\u4ee4\u958b\u59cb\u4e00\u500b\u65b0\u4e8b\u52d9\u3002\u96a8\u5f8c\u6211\u5011\u5728 “customers” \u8868\u4e2d\u63d2\u5165\u4e86\u4e00\u4f4d\u65b0\u5ba2\u6236\uff0c\u4e26\u66f4\u65b0\u4e86\u8a02\u55ae\u7684\u72c0\u614b\u3002\u6700\u5f8c\uff0c\u6211\u5011\u4f7f\u7528 COMMIT<\/code> \u547d\u4ee4\u63d0\u4ea4\u4e8b\u52d9\uff0c\u4f7f\u6240\u6709\u66f4\u6539\u6c38\u4e45\u751f\u6548\u3002<\/p>\n
\u5982\u679c\u5728\u4e8b\u52d9\u904e\u7a0b\u4e2d\u51fa\u73fe\u932f\u8aa4\uff0c\u6216\u6211\u5011\u6c7a\u5b9a\u53d6\u6d88\u66f4\u6539\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 ROLLBACK<\/code> \u547d\u4ee4\u4f86\u64a4\u92b7\u66f4\u6539\u4e26\u7d50\u675f\u4e8b\u52d9\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff1a<\/p>\n
BEGIN;\r\nINSERT INTO customers (name, email) VALUES ('John Doe', 'john@example.com');\r\nUPDATE orders SET status = 'completed' WHERE customer_id = 1;\r\nROLLBACK;\r\n<\/code><\/pre>\n
\u5728\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0cROLLBACK<\/code> \u547d\u4ee4\u5c07\u64a4\u92b7 INSERT<\/code> \u548c UPDATE<\/code> \u8a9e\u53e5\u6240\u505a\u7684\u66f4\u6539\uff0c\u6709\u6548\u5730\u53d6\u6d88\u4e8b\u52d9\u3002<\/p>\n
\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225<\/h2>\n
PostgreSQL \u652f\u63f4\u4e0d\u540c\u7684\u4e8b\u52d9\u9694\u96e2\u7d1a\u5225\uff0c\u9019\u6c7a\u5b9a\u4e86\u4e26\u767c\u4e8b\u52d9\u4e4b\u9593\u5982\u4f55\u4e92\u52d5\u3002PostgreSQL \u7684\u9ed8\u8a8d\u9694\u96e2\u7d1a\u5225\u662f \u8b80\u5df2\u63d0\u4ea4\uff08Read Committed\uff09<\/em>\uff0c\u9019\u5728\u4e26\u767c\u6027\u548c\u6578\u64da\u4e00\u81f4\u6027\u4e4b\u9593\u63d0\u4f9b\u4e86\u826f\u597d\u7684\u5e73\u8861\u3002<\/p>\n
\u5176\u4ed6\u9694\u96e2\u7d1a\u5225\uff0c\u5982 \u53ef\u5e8f\u5217\u5316\uff08Serializable\uff09<\/em> \u548c \u53ef\u91cd\u8907\u8b80\u53d6\uff08Repeatable Read\uff09<\/em>\uff0c\u63d0\u4f9b\u66f4\u5f37\u7684\u4fdd\u8b49\uff0c\u4f46\u53ef\u80fd\u6703\u56e0\u9396\u5b9a\u548c\u4e8b\u52d9\u5e8f\u5217\u5316\u589e\u52a0\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
BEGIN<\/code> \u547d\u4ee4\u662f PostgreSQL \u4e8b\u52d9\u7ba1\u7406\u7cfb\u7d71\u7684\u57fa\u672c\u7d44\u6210\u90e8\u5206\u3002\u5b83\u5141\u8a31\u60a8\u5c07\u591a\u500b SQL \u8a9e\u53e5\u7d44\u5408\u6210\u4e00\u500b\u4e8b\u52d9\uff0c\u5f9e\u800c\u4fdd\u8b49\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u4f7f\u7528 COMMIT<\/code> \u548c ROLLBACK<\/code> \u547d\u4ee4\uff0c\u60a8\u53ef\u4ee5\u63a7\u5236\u4e8b\u52d9\u7684\u7d50\u679c\uff0c\u6c7a\u5b9a\u4f7f\u66f4\u6539\u6c38\u4e45\u751f\u6548\u6216\u64a4\u92b7\u5b83\u5011\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc PostgreSQL \u53ca\u5176\u529f\u80fd\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u63a2\u7d22 Hong Kong VPS Hosting<\/a>\u3002Server.HK \u63d0\u4f9b\u529f\u80fd\u5f37\u5927\u4e14\u53ef\u9760\u7684 VPS \u89e3\u6c7a\u65b9\u6848\uff0c\u70ba\u60a8\u63d0\u4f9b\u904b\u884c PostgreSQL \u6578\u64da\u5eab\u7684\u7406\u60f3\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
PostgreSQL \u547d\u4ee4\uff1aBE...<\/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-20371","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20371","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=20371"}],"version-history":[{"count":2,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20371\/revisions"}],"predecessor-version":[{"id":24381,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20371\/revisions\/24381"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}