{"id":142637,"date":"2024-10-31T22:56:20","date_gmt":"2024-10-31T14:56:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/142637\/"},"modified":"2024-10-31T22:56:20","modified_gmt":"2024-10-31T14:56:20","slug":"sqlite-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%84%e6%9d%9f%e8%a9%b3%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/142637\/","title":{"rendered":"SQLite \u6578\u64da\u5eab\u7d04\u675f\u8a73\u89e3"},"content":{"rendered":"

SQLite \u6578\u64da\u5eab\u7d04\u675f\u8a73\u89e3<\/h1>\n

SQLite \u662f\u4e00\u7a2e\u8f15\u91cf\u7d1a\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u5b83\u7684\u7c21\u55ae\u6027\u548c\u9ad8\u6548\u6027\u4f7f\u5176\u6210\u70ba\u958b\u767c\u8005\u7684\u71b1\u9580\u9078\u64c7\u3002\u5728 SQLite \u4e2d\uff0c\u6578\u64da\u5eab\u7d04\u675f\u662f\u7528\u4f86\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6b63\u78ba\u6027\u7684\u91cd\u8981\u5de5\u5177\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39 SQLite \u4e2d\u7684\u5404\u7a2e\u6578\u64da\u5eab\u7d04\u675f\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u7d04\u675f\uff1f<\/h2>\n

\u6578\u64da\u5eab\u7d04\u675f\u662f\u7528\u4f86\u9650\u5236\u6578\u64da\u8868\u4e2d\u6578\u64da\u7684\u985e\u578b\u3001\u7bc4\u570d\u548c\u683c\u5f0f\u7684\u898f\u5247\u3002\u9019\u4e9b\u7d04\u675f\u53ef\u4ee5\u5e6b\u52a9\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u4e0d\u6b63\u78ba\u6216\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u9032\u5165\u6578\u64da\u5eab\u3002SQLite \u652f\u6301\u591a\u7a2e\u7d04\u675f\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u7d04\u675f\u985e\u578b\uff1a<\/p>\n

1. NOT NULL \u7d04\u675f<\/h2>\n

NOT NULL \u7d04\u675f\u7528\u65bc\u78ba\u4fdd\u67d0\u4e00\u5217\u4e0d\u80fd\u5305\u542b\u7a7a\u503c\u3002\u9019\u610f\u5473\u8457\u5728\u63d2\u5165\u6216\u66f4\u65b0\u6578\u64da\u6642\uff0c\u8a72\u5217\u5fc5\u9808\u6709\u4e00\u500b\u6709\u6548\u7684\u503c\u3002<\/p>\n

CREATE TABLE users (\n    id INTEGER PRIMARY KEY,\n    username TEXT NOT NULL,\n    email TEXT NOT NULL\n);<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0cusername<\/code> \u548c email<\/code> \u5217\u90fd\u8a2d\u7f6e\u4e86 NOT NULL \u7d04\u675f\uff0c\u9019\u610f\u5473\u8457\u9019\u5169\u500b\u5b57\u6bb5\u5728\u63d2\u5165\u6578\u64da\u6642\u5fc5\u9808\u63d0\u4f9b\u503c\u3002<\/p>\n
2. UNIQUE \u7d04\u675f<\/h2>\n
UNIQUE \u7d04\u675f\u78ba\u4fdd\u67d0\u4e00\u5217\u6216\u591a\u5217\u7684\u503c\u5728\u6574\u500b\u8868\u4e2d\u662f\u552f\u4e00\u7684\u3002\u9019\u5c0d\u65bc\u9632\u6b62\u91cd\u8907\u6578\u64da\u975e\u5e38\u6709\u7528\u3002<\/p>\n
CREATE TABLE users (\n    id INTEGER PRIMARY KEY,\n    username TEXT UNIQUE,\n    email TEXT UNIQUE\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cusername<\/code> \u548c email<\/code> \u5217\u90fd\u8a2d\u7f6e\u4e86 UNIQUE \u7d04\u675f\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u7528\u6236\u7684\u7528\u6236\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n
3. PRIMARY KEY \u7d04\u675f<\/h2>\n
PRIMARY KEY \u7d04\u675f\u7528\u65bc\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\uff0c\u4e3b\u9375\u7684\u503c\u4e0d\u80fd\u70ba\u7a7a\u4e14\u5fc5\u9808\u552f\u4e00\u3002<\/p>\n
CREATE TABLE users (\n    id INTEGER PRIMARY KEY,\n    username TEXT NOT NULL,\n    email TEXT NOT NULL\n);<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0cid<\/code> \u5217\u88ab\u8a2d\u7f6e\u70ba\u4e3b\u9375\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u7528\u6236\u90fd\u6703\u6709\u4e00\u500b\u552f\u4e00\u7684\u6a19\u8b58\u7b26\u3002<\/p>\n
4. FOREIGN KEY \u7d04\u675f<\/h2>\n
FOREIGN KEY \u7d04\u675f\u7528\u65bc\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002\u5b83\u78ba\u4fdd\u4e00\u500b\u8868\u4e2d\u7684\u67d0\u4e00\u5217\u7684\u503c\u5fc5\u9808\u5b58\u5728\u65bc\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\u4e2d\u3002<\/p>\n
CREATE TABLE orders (\n    order_id INTEGER PRIMARY KEY,\n    user_id INTEGER,\n    FOREIGN KEY (user_id) REFERENCES users(id)\n);<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cuser_id<\/code> \u5217\u662f\u5916\u9375\uff0c\u6307\u5411 users<\/code> \u8868\u4e2d\u7684 id<\/code> \u5217\u3002\u9019\u78ba\u4fdd\u4e86\u6bcf\u500b\u8a02\u55ae\u90fd\u5fc5\u9808\u8207\u4e00\u500b\u6709\u6548\u7684\u7528\u6236\u76f8\u95dc\u806f\u3002<\/p>\n
5. CHECK \u7d04\u675f<\/h2>\n
CHECK \u7d04\u675f\u7528\u65bc\u9650\u5236\u5217\u4e2d\u7684\u503c\uff0c\u78ba\u4fdd\u5b83\u5011\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 CHECK \u7d04\u675f\u4f86\u78ba\u4fdd\u5e74\u9f61\u5217\u7684\u503c\u5fc5\u9808\u5927\u65bc 0\u3002<\/p>\n
CREATE TABLE users (\n    id INTEGER PRIMARY KEY,\n    age INTEGER CHECK (age > 0)\n);<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0cage<\/code> \u5217\u8a2d\u7f6e\u4e86 CHECK \u7d04\u675f\uff0c\u9019\u610f\u5473\u8457\u5e74\u9f61\u5fc5\u9808\u5927\u65bc 0\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
SQLite \u63d0\u4f9b\u4e86\u591a\u7a2e\u6578\u64da\u5eab\u7d04\u675f\u4f86\u5e6b\u52a9\u958b\u767c\u8005\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6b63\u78ba\u6027\u3002\u901a\u904e\u4f7f\u7528 NOT NULL\u3001UNIQUE\u3001PRIMARY KEY\u3001FOREIGN KEY \u548c CHECK \u7b49\u7d04\u675f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u8cea\u91cf\u548c\u4e00\u81f4\u6027\u3002\u5728\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u6642\uff0c\u4e86\u89e3\u9019\u4e9b\u7d04\u675f\u7684\u4f7f\u7528\u5c07\u6709\u52a9\u65bc\u66f4\u597d\u5730\u8a2d\u8a08\u548c\u7ba1\u7406\u6578\u64da\u5eab\u3002\u7121\u8ad6\u662f\u4f7f\u7528 \u9999\u6e2f VPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6b63\u78ba\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u90fd\u662f\u6210\u529f\u7684\u95dc\u9375\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6df1\u5165\u63a2\u8a0eSQLite\u6578\u64da\u5eab\u4e2d\u7684\u7d04\u675f\u689d\u4ef6\uff0c\u4e86\u89e3\u4e3b\u9375\u3001\u5916\u9375\u3001\u552f\u4e00\u6027\u53ca\u6aa2\u67e5\u7d04\u675f\u7684\u4f7f\u7528\u8207\u61c9\u7528\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-142637","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/142637","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=142637"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/142637\/revisions"}],"predecessor-version":[{"id":142638,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/142637\/revisions\/142638"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=142637"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=142637"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=142637"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}