{"id":5681,"date":"2024-11-14T12:39:46","date_gmt":"2024-11-14T04:39:46","guid":{"rendered":"https:\/\/fwq.ai\/blog\/5681\/"},"modified":"2024-11-14T12:39:46","modified_gmt":"2024-11-14T04:39:46","slug":"sql%e5%88%9b%e5%bb%ba%e8%a1%a8%e8%af%ad%e5%8f%a5%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/5681\/","title":{"rendered":"sql\u521b\u5efa\u8868\u8bed\u53e5\u600e\u4e48\u5199"},"content":{"rendered":"

\n sql create table \u8bed\u53e5\u7528\u4e8e\u521b\u5efa\u5305\u542b\u6307\u5b9a\u5217\u540d\u548c\u6570\u636e\u7c7b\u578b\u7684\u65b0\u8868\u3002\u53c2\u6570\u5305\u62ec\u8868\u540d\u3001\u5217\u540d\u3001\u6570\u636e\u7c7b\u578b\u3001not null \u7ea6\u675f\u3001null \u7ea6\u675f\u548c\u7ea6\u675f\u3002\u4f8b\u5982\uff0c”create table customers (customer_id int not null auto_increment, first_name varchar(50) not null, last_name varchar(50) not null, email varchar(100) unique)” \u521b\u5efa\u4e00\u4e2a “custom\n<\/p><\/blockquote>\n

\"sql\u521b\u5efa\u8868\u8bed\u53e5\u600e\u4e48\u5199\u63d2\u56fe\"<\/p>\n

SQL \u521b\u5efa\u8868\u8bed\u53e5<\/h2>\n

\u5728 SQL \u4e2d\uff0cCREATE TABLE<\/strong> \u8bed\u53e5\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8868\uff0c\u5b83\u6307\u5b9a\u4e86\u8868\u540d\u3001\u5217\u540d\u53ca\u5176\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

\u8bed\u6cd5<\/h3>\n
CREATE TABLE table_name (\n  column_name1 data_type [NOT NULL | NULL] [constraints],\n  column_name2 data_type [NOT NULL | NULL] [constraints],\n  ...\n);<\/pre>\n
  \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
\u53c2\u6570<\/h3>\n
    \n
  •  table_name\uff1a<\/strong>\u65b0\u8868\u7684\u540d\u79f0\u3002<\/li>\n
  •  column_name\uff1a<\/strong>\u8868\u7684\u5217\u540d\u3002<\/li>\n
  •  data_type\uff1a<\/strong>\u5217\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f8b\u5982INT<\/strong>\u3001VARCHAR(n)<\/strong>\u6216DATE<\/strong>\u3002<\/li>\n
  •  NOT NULL\uff1a<\/strong>\u6307\u793a\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002<\/li>\n
  •  NULL\uff1a<\/strong>\u6307\u793a\u5217\u53ef\u4ee5\u5305\u542b\u7a7a\u503c\u3002<\/li>\n
  •  constraints\uff1a<\/strong>\u5bf9\u5217\u65bd\u52a0\u7684\u7ea6\u675f\uff0c\u5982UNIQUE<\/strong>\u6216FOREIGN KEY<\/strong>\u3002<\/li>\n<\/ul>\n
    \u793a\u4f8b<\/h3>\n
    \u521b\u5efa\u4e00\u4e2a\u540d\u4e3a “customers” \u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n
    CREATE TABLE customers (\n  customer_id INT NOT NULL AUTO_INCREMENT,\n  first_name VARCHAR(50) NOT NULL,\n  last_name VARCHAR(50) NOT NULL,\n  email VARCHAR(100) UNIQUE\n);<\/pre>\n
      \u767b\u5f55\u540e\u590d\u5236   <\/p>\n
    \u89e3\u91ca<\/h3>\n
      \n
    • customer_id \u5217\u662f\u4e00\u4e2a\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u5b83\u4f7f\u7528 AUTO_INCREMENT \u7ea6\u675f\u81ea\u52a8\u589e\u52a0\u3002<\/li>\n
    • first_name \u548c last_name \u5217\u4e0d\u5141\u8bb8\u4e3a\u7a7a\u503c\u3002<\/li>\n
    • email \u5217\u662f\u552f\u4e00\u7684\uff0c\u8fd9\u610f\u5473\u7740\u4e0d\u4f1a\u6709\u4e24\u4e2a\u5ba2\u6237\u5177\u6709\u76f8\u540c\u7684\u7535\u5b50\u90ae\u4ef6\u5730\u5740\u3002<\/li>\n<\/ul>\n
      \u6ce8\u610f<\/h3>\n
        \n
      • \u8868\u540d\u548c\u5217\u540d\u5e94\u4f7f\u7528\u5c0f\u5199\u5b57\u6bcd\u3002<\/li>\n
      • \u6570\u636e\u7c7b\u578b\u5e94\u4e0e\u8981\u5b58\u50a8\u7684\u6570\u636e\u5339\u914d\u3002<\/li>\n
      • NOT NULL \u7ea6\u675f\u53ef\u786e\u4fdd\u5217\u59cb\u7ec8\u5305\u542b\u503c\uff0c\u9664\u975e\u660e\u786e\u8bbe\u7f6e\u4e3a NULL\u3002<\/li>\n
      • \u7ea6\u675f\u53ef\u7528\u4e8e\u5f3a\u5236\u6570\u636e\u5b8c\u6574\u6027\u548c\u786e\u4fdd\u6570\u636e\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n
        \u4ee5\u4e0a\u5c31\u662fsql\u521b\u5efa\u8868\u8bed\u53e5\u600e\u4e48\u5199\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
        sql create table \u8bed\u53e5\u7528\u4e8e\u521b\u5efa\u5305\u542b\u6307\u5b9a\u5217\u540d\u548c\u6570\u636e\u7c7b\u578b\u7684\u65b0\u8868\u3002\u53c2\u6570\u5305\u62ec\u8868\u540d\u3001\u5217\u540d\u3001\u6570\u636e\u7c7b\u578b\u3001not null \u7ea6\u675f\u3001null \u7ea6\u675f\u548c\u7ea6\u675f\u3002\u4f8b\u5982\uff0c”create table customers (customer_id int not null auto_increment, first_name varchar(50) not null, last_name varchar(50) not null, email varchar(100) unique)” \u521b\u5efa\u4e00\u4e2a “custom SQL \u521b\u5efa\u8868\u8bed\u53e5 \u5728 SQL \u4e2d\uff0cCREATE TABLE \u8bed\u53e5\u7528\u4e8e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8868\uff0c\u5b83\u6307\u5b9a\u4e86\u8868\u540d\u3001\u5217\u540d\u53ca\u5176\u6570\u636e\u7c7b\u578b\u3002 \u8bed\u6cd5 CREATE TABLE table_name ( column_name1 data_type [NOT NULL | NULL] [constraints], column_name2 data_type [NOT NULL | NULL] [constraints], … ); […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-5681","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5681","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=5681"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/5681\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=5681"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=5681"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=5681"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}