{"id":2625,"date":"2025-03-11T23:37:55","date_gmt":"2025-03-11T15:37:55","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2625"},"modified":"2025-03-11T23:37:55","modified_gmt":"2025-03-11T15:37:55","slug":"postgresql-update-%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/11\/postgresql-update-%e8%af%ad%e5%8f%a5\/","title":{"rendered":"PostgreSQL UPDATE \u8bed\u53e5"},"content":{"rendered":"\n

UPDATE<\/code> \u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u5df2\u5b58\u5728\u7684\u6570\u636e\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7 WHERE<\/code> \u5b50\u53e5\u6307\u5b9a\u54ea\u4e9b\u8bb0\u5f55\u9700\u8981\u66f4\u65b0\uff0c\u5982\u679c\u4e0d\u52a0 WHERE<\/code>\uff0c\u6240\u6709\u8bb0\u5f55\u90fd\u4f1a\u88ab\u66f4\u65b0\u3002<\/p>\n\n\n\n

\n\n\n\n

1. UPDATE \u8bed\u6cd5<\/strong><\/h2>\n\n\n\n
UPDATE table_name\nSET column1 = value1, column2 = value2, ...\nWHERE condition;<\/code><\/pre>\n\n\n\n
    \n
  • table_name<\/code>\uff1a\u4f60\u8981\u66f4\u65b0\u6570\u636e\u7684\u8868\u540d\u3002<\/li>\n\n\n\n
  • column1<\/code>, column2<\/code>, \u2026\uff1a\u4f60\u60f3\u8981\u66f4\u65b0\u7684\u5217\u3002<\/li>\n\n\n\n
  • value1<\/code>, value2<\/code>, \u2026\uff1a\u5217\u7684\u65b0\u503c\u3002<\/li>\n\n\n\n
  • condition<\/code>\uff1a\u6761\u4ef6\uff0c\u786e\u5b9a\u54ea\u4e9b\u884c\u5c06\u88ab\u66f4\u65b0\u3002\u5982\u679c\u6ca1\u6709 WHERE<\/code> \u6761\u4ef6\uff0c\u6240\u6709\u884c\u90fd\u4f1a\u88ab\u66f4\u65b0\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    2. \u793a\u4f8b<\/strong><\/h2>\n\n\n\n
    \u5047\u8bbe\u6709\u4e00\u4e2a employees<\/code> \u8868\uff0c\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n\n\n\n
    CREATE TABLE employees (\n    id SERIAL PRIMARY KEY,\n    name VARCHAR(50),\n    age INT,\n    department VARCHAR(50),\n    salary DECIMAL(10,2)\n);<\/code><\/pre>\n\n\n\n
    \u5411\u8868\u4e2d\u63d2\u5165\u4e00\u4e9b\u6570\u636e\uff1a<\/p>\n\n\n\n
    INSERT INTO employees (name, age, department, salary) VALUES\n('Alice', 30, 'HR', 6000),\n('Bob', 35, 'IT', 8000),\n('Charlie', 28, 'Finance', 5500),\n('David', 40, 'IT', 9500),\n('Eve', 25, 'HR', 5000);<\/code><\/pre>\n\n\n\n
    \n\n\n\n
    2.1 \u66f4\u65b0\u5355\u4e2a\u5b57\u6bb5<\/strong><\/h3>\n\n\n\n
    \u67e5\u8be2<\/strong>\uff1a\u5c06 Alice<\/code> \u7684\u85aa\u6c34\u66f4\u65b0\u4e3a 6500\u3002<\/p>\n\n\n\n
    UPDATE employees\nSET salary = 6500\nWHERE name = 'Alice';<\/code><\/pre>\n\n\n\n
    \u7ed3\u679c<\/strong>\uff1a\u53ea\u4f1a\u66f4\u65b0 Alice<\/code> \u7684\u85aa\u6c34\uff0c\u5176\u4ed6\u5458\u5de5\u7684\u6570\u636e\u4e0d\u53d8\u3002<\/p>\n\n\n\n
    \n\n\n\n
    2.2 \u66f4\u65b0\u591a\u4e2a\u5b57\u6bb5<\/strong><\/h3>\n\n\n\n
    \u67e5\u8be2<\/strong>\uff1a\u5c06 Bob<\/code> \u7684\u5e74\u9f84\u66f4\u65b0\u4e3a 36\uff0c\u5e76\u5c06\u4ed6\u7684\u85aa\u6c34\u66f4\u65b0\u4e3a 8500\u3002<\/p>\n\n\n\n
    UPDATE employees\nSET age = 36, salary = 8500\nWHERE name = 'Bob';<\/code><\/pre>\n\n\n\n
    \u7ed3\u679c<\/strong>\uff1aBob<\/code> \u7684\u5e74\u9f84\u548c\u85aa\u6c34\u88ab\u66f4\u65b0\u3002<\/p>\n\n\n\n
    \n\n\n\n
    2.3 \u4f7f\u7528\u8868\u8fbe\u5f0f\u66f4\u65b0\u5b57\u6bb5<\/strong><\/h3>\n\n\n\n
    \u4f60\u53ef\u4ee5\u4f7f\u7528\u8ba1\u7b97\u3001\u51fd\u6570\u7b49\u8868\u8fbe\u5f0f\u6765\u66f4\u65b0\u5217\u7684\u503c\u3002<\/p>\n\n\n\n
    \u67e5\u8be2<\/strong>\uff1a\u5c06\u6240\u6709 IT<\/code> \u90e8\u95e8\u5458\u5de5\u7684\u85aa\u6c34\u589e\u52a0 10%\u3002<\/p>\n\n\n\n
    UPDATE employees\nSET salary = salary * 1.1\nWHERE department = 'IT';<\/code><\/pre>\n\n\n\n
    \u7ed3\u679c<\/strong>\uff1aIT<\/code> \u90e8\u95e8\u7684\u5458\u5de5\u85aa\u6c34\u4f1a\u589e\u52a0 10%\u3002<\/p>\n\n\n\n
    \n\n\n\n
    2.4 \u4f7f\u7528\u5b50\u67e5\u8be2\u66f4\u65b0\u5b57\u6bb5<\/strong><\/h3>\n\n\n\n
    \u53ef\u4ee5\u4f7f\u7528\u5b50\u67e5\u8be2\u6765\u52a8\u6001\u5730\u66f4\u65b0\u6570\u636e\u3002<\/p>\n\n\n\n
    \u67e5\u8be2<\/strong>\uff1a\u66f4\u65b0 HR<\/code> \u90e8\u95e8\u5458\u5de5\u7684\u85aa\u6c34\u4e3a\u6240\u6709 IT<\/code> \u90e8\u95e8\u5458\u5de5\u85aa\u6c34\u7684\u5e73\u5747\u503c\u3002<\/p>\n\n\n\n
    UPDATE employees\nSET salary = (SELECT AVG(salary) FROM employees WHERE department = 'IT')\nWHERE department = 'HR';<\/code><\/pre>\n\n\n\n
    \u7ed3\u679c<\/strong>\uff1aHR<\/code> \u90e8\u95e8\u7684\u5458\u5de5\u85aa\u6c34\u5c06\u66f4\u65b0\u4e3a IT<\/code> \u90e8\u95e8\u5458\u5de5\u85aa\u6c34\u7684\u5e73\u5747\u503c\u3002<\/p>\n\n\n\n
    \n\n\n\n
    3. \u4f7f\u7528 RETURNING \u5b50\u53e5\u83b7\u53d6\u66f4\u65b0\u540e\u7684\u7ed3\u679c<\/strong><\/h2>\n\n\n\n
    RETURNING<\/code> \u5b50\u53e5\u5141\u8bb8\u4f60\u8fd4\u56de\u66f4\u65b0\u64cd\u4f5c\u540e\u7684\u6570\u636e\uff0c\u4fbf\u4e8e\u68c0\u67e5\u66f4\u65b0\u7ed3\u679c\u3002<\/p>\n\n\n\n
    \u67e5\u8be2<\/strong>\uff1a\u66f4\u65b0 Charlie<\/code> \u7684\u90e8\u95e8\u4e3a Marketing<\/code>\uff0c\u5e76\u8fd4\u56de\u66f4\u65b0\u540e\u7684\u8bb0\u5f55\u3002<\/p>\n\n\n\n
    UPDATE employees\nSET department = 'Marketing'\nWHERE name = 'Charlie'\nRETURNING *;<\/code><\/pre>\n\n\n\n
    \u7ed3\u679c<\/strong>\uff1a<\/p>\n\n\n\n
    id | name    | age | department | salary\n---+---------+-----+------------+--------\n3  | Charlie |  28 | Marketing  | 5500.00<\/code><\/pre>\n\n\n\n
    RETURNING<\/code> \u5b50\u53e5\u8fd4\u56de\u7684\u662f\u66f4\u65b0\u540e\u7684\u8bb0\u5f55\u3002<\/p>\n\n\n\n
    \n\n\n\n
    4. \u4f7f\u7528 UPDATE \u8bed\u53e5\u7684\u6ce8\u610f\u4e8b\u9879<\/strong><\/h2>\n\n\n\n
      \n
    • \u6761\u4ef6\u975e\u5e38\u91cd\u8981<\/strong>\uff1a\u5728\u6ca1\u6709 WHERE<\/code> \u5b50\u53e5\u7684\u60c5\u51b5\u4e0b\uff0cUPDATE<\/code> \u4f1a\u66f4\u65b0\u8868\u4e2d\u7684\u6240\u6709\u884c\u3002\u786e\u4fdd\u4f60\u4f7f\u7528\u4e86\u6b63\u786e\u7684\u6761\u4ef6\u3002<\/li>\n\n\n\n
    • \u907f\u514d\u5168\u8868\u66f4\u65b0<\/strong>\uff1a\u5728\u6ca1\u6709 WHERE<\/code> \u6761\u4ef6\u65f6\uff0c\u66f4\u65b0\u6240\u6709\u884c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u53ef\u9884\u89c1\u7684\u9519\u8bef\u6216\u6570\u636e\u4e22\u5931\u3002<\/li>\n\n\n\n
    • \u4f7f\u7528 RETURNING<\/code><\/strong>\uff1aRETURNING<\/code> \u5b50\u53e5\u53ef\u4ee5\u5e2e\u52a9\u4f60\u786e\u8ba4\u6570\u636e\u66f4\u65b0\u60c5\u51b5\u3002<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      5. \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
        \n
      • UPDATE<\/code> \u8bed\u53e5\u7528\u4e8e\u66f4\u65b0\u8868\u4e2d\u7684\u6570\u636e\u3002<\/li>\n\n\n\n
      • \u53ef\u4ee5\u66f4\u65b0\u5355\u4e2a\u6216\u591a\u4e2a\u5217\u7684\u503c\u3002<\/li>\n\n\n\n
      • \u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u6765\u6307\u5b9a\u66f4\u65b0\u7684\u8bb0\u5f55\u3002<\/li>\n\n\n\n
      • \u53ef\u4ee5\u4f7f\u7528\u5b50\u67e5\u8be2\u548c\u8868\u8fbe\u5f0f\u6765\u52a8\u6001\u66f4\u65b0\u6570\u636e\u3002<\/li>\n\n\n\n
      • RETURNING<\/code> \u5b50\u53e5\u5e2e\u52a9\u4f60\u67e5\u770b\u66f4\u65b0\u540e\u7684\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n
        \u901a\u8fc7\u6b63\u786e\u4f7f\u7528 UPDATE<\/code> \u8bed\u53e5\uff0c\u4f60\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u548c\u4fee\u6539\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u3002\u5176\u4ed6\u76f8\u5173\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
        UPDATE \u8bed\u53e5\u7528\u4e8e\u4fee\u6539\u8868\u4e2d\u5df2\u5b58\u5728\u7684\u6570\u636e\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7 WHERE \u5b50\u53e5\u6307\u5b9a\u54ea\u4e9b\u8bb0\u5f55\u9700\u8981\u66f4\u65b0\uff0c\u5982\u679c\u4e0d\u52a0 WHE […]<\/p>\n","protected":false},"author":1,"featured_media":2626,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[78],"tags":[],"class_list":["post-2625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-postgresql"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2625"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2625\/revisions"}],"predecessor-version":[{"id":2627,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2625\/revisions\/2627"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/2626"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}