{"id":168463,"date":"2024-11-06T12:35:25","date_gmt":"2024-11-06T04:35:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168463\/"},"modified":"2024-11-06T12:35:26","modified_gmt":"2024-11-06T04:35:26","slug":"sql-%e8%aa%9e%e5%8f%a5%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a%e5%ba%ab%e6%95%b8%e6%93%9a%e8%a9%b3%e8%a7%a3-sql-%e8%aa%9e%e5%8f%a5%e6%95%b8%e6%93%9a%e5%ba%ab%e4%bf%ae%e6%94%b9%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168463\/","title":{"rendered":"SQL \u8a9e\u53e5\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u8a73\u89e3 (sql \u8a9e\u53e5\u6578\u64da\u5eab\u4fee\u6539\u6578\u64da)"},"content":{"rendered":"

SQL \u8a9e\u53e5\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\u8a73\u89e3<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u81f3\u95dc\u91cd\u8981\u7684\u5de5\u5177\u3002\u5b83\u4e0d\u50c5\u7528\u65bc\u67e5\u8a62\u6578\u64da\uff0c\u9084\u53ef\u4ee5\u7528\u4f86\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\uff0c\u5305\u62ec\u5e38\u7528\u7684\u8a9e\u53e5\u53ca\u5176\u7528\u6cd5\u3002<\/p>\n

SQL \u4fee\u6539\u6578\u64da\u7684\u57fa\u672c\u8a9e\u53e5<\/h2>\n

\u5728 SQL \u4e2d\uff0c\u6700\u5e38\u7528\u7684\u4fee\u6539\u6578\u64da\u7684\u8a9e\u53e5\u662f UPDATE<\/code>\u3001INSERT<\/code> \u548c DELETE<\/code>\u3002\u9019\u4e9b\u8a9e\u53e5\u5404\u81ea\u6709\u4e0d\u540c\u7684\u529f\u80fd\uff0c\u4e0b\u9762\u5c07\u9010\u4e00\u4ecb\u7d39\u3002<\/p>\n

1. UPDATE \u8a9e\u53e5<\/h3>\n

UPDATE<\/code> \u8a9e\u53e5\u7528\u65bc\u4fee\u6539\u5df2\u5b58\u5728\u7684\u6578\u64da\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

UPDATE \u8868\u540d\nSET \u52171 = \u503c1, \u52172 = \u503c2, ...\nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba employees<\/code> \u7684\u8868\uff0c\u60f3\u8981\u66f4\u65b0\u67d0\u4f4d\u54e1\u5de5\u7684\u85aa\u6c34\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
UPDATE employees\nSET salary = 60000\nWHERE employee_id = 1;<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u53ea\u6709 employee_id<\/code> \u70ba 1 \u7684\u54e1\u5de5\u7684\u85aa\u6c34\u6703\u88ab\u66f4\u65b0\u70ba 60000\u3002\u5982\u679c\u6c92\u6709 WHERE<\/code> \u689d\u4ef6\uff0c\u5247\u6240\u6709\u8a18\u9304\u7684\u85aa\u6c34\u90fd\u6703\u88ab\u66f4\u65b0\u3002<\/p>\n
2. INSERT \u8a9e\u53e5<\/h3>\n
INSERT<\/code> \u8a9e\u53e5\u7528\u65bc\u5411\u6578\u64da\u5eab\u4e2d\u6dfb\u52a0\u65b0\u6578\u64da\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
INSERT INTO \u8868\u540d (\u52171, \u52172, ...)\nVALUES (\u503c1, \u503c2, ...);<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5411 employees<\/code> \u8868\u4e2d\u6dfb\u52a0\u4e00\u4f4d\u65b0\u54e1\u5de5\u7684\u8a18\u9304\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
INSERT INTO employees (name, position, salary)\nVALUES ('John Doe', 'Developer', 50000);<\/code><\/pre>\n
3. DELETE \u8a9e\u53e5<\/h3>\n
DELETE<\/code> \u8a9e\u53e5\u7528\u65bc\u522a\u9664\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
DELETE FROM \u8868\u540d\nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u82e5\u8981\u522a\u9664 employee_id<\/code> \u70ba 1 \u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n
DELETE FROM employees\nWHERE employee_id = 1;<\/code><\/pre>\n
\u540c\u6a23\u5730\uff0c\u5982\u679c\u6c92\u6709 WHERE<\/code> \u689d\u4ef6\uff0c\u5247\u6574\u500b\u8868\u7684\u6578\u64da\u90fd\u6703\u88ab\u522a\u9664\u3002<\/p>\n
\u4f7f\u7528\u4e8b\u52d9\u4f86\u4fdd\u8b77\u6578\u64da<\/h2>\n
\u5728\u9032\u884c\u6578\u64da\u4fee\u6539\u6642\uff0c\u4f7f\u7528\u4e8b\u52d9\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\uff0c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u4f7f\u7528 BEGIN TRANSACTION<\/code> \u958b\u59cb\u4e8b\u52d9\uff0c\u7136\u5f8c\u4f7f\u7528 COMMIT<\/code> \u63d0\u4ea4\u6216 ROLLBACK<\/code> \u56de\u6efe\u3002<\/p>\n
BEGIN TRANSACTION;\n\nUPDATE employees\nSET salary = 60000\nWHERE employee_id = 1;\n\nCOMMIT;<\/code><\/pre>\n
\u5982\u679c\u5728\u66f4\u65b0\u904e\u7a0b\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528 ROLLBACK<\/code> \u4f86\u64a4\u92b7\u6240\u6709\u64cd\u4f5c\uff0c\u78ba\u4fdd\u6578\u64da\u4e0d\u6703\u8655\u65bc\u4e0d\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
SQL \u8a9e\u53e5\u662f\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\uff0c\u901a\u904e UPDATE<\/code>\u3001INSERT<\/code> \u548c DELETE<\/code> \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u4fee\u6539\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u3002\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u8a9e\u53e5\u53ca\u5176\u7528\u6cd5\uff0c\u5c0d\u65bc\u4efb\u4f55\u5e0c\u671b\u6709\u6548\u7ba1\u7406\u6578\u64da\u7684\u958b\u767c\u8005\u4f86\u8aaa\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n
\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u5728 \u9999\u6e2fVPS<\/a> \u4e0a\u904b\u884c\u548c\u7ba1\u7406\u6578\u64da\u5eab\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8a0e SQL \u8a9e\u53e5\u5982\u4f55\u6709\u6548\u4fee\u6539\u6578\u64da\u5eab\u6578\u64da\uff0c\u63d0\u4f9b\u8a73\u7d30\u7bc4\u4f8b\u8207\u6280\u5de7\uff0c\u52a9\u60a8\u8f15\u9b06\u638c\u63e1\u6578\u64da\u7ba1\u7406\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-168463","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168463","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=168463"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168463\/revisions"}],"predecessor-version":[{"id":168464,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168463\/revisions\/168464"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168463"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168463"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168463"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}