{"id":2301,"date":"2025-03-04T08:26:55","date_gmt":"2025-03-04T00:26:55","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2301"},"modified":"2025-03-04T08:26:55","modified_gmt":"2025-03-04T00:26:55","slug":"sqlite-%e8%af%ad%e6%b3%95%e5%a4%a7%e5%85%a8","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/04\/sqlite-%e8%af%ad%e6%b3%95%e5%a4%a7%e5%85%a8\/","title":{"rendered":"SQLite \u8bed\u6cd5\u5927\u5168"},"content":{"rendered":"\n
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SQLite \u8bed\u6cd5\u5927\u90e8\u5206\u4e0e\u6807\u51c6 SQL \u517c\u5bb9\uff0c\u4f46\u7531\u4e8e\u5176\u8f7b\u91cf\u7ea7\u7279\u6027\uff0c\u6709\u4e9b SQL \u529f\u80fd\u6709\u6240\u4e0d\u540c\u3002\u4e0b\u9762\u662f SQLite \u7684\u4e3b\u8981 SQL \u8bed\u6cd5\uff0c\u5305\u62ec\u6570\u636e\u5e93\u7ba1\u7406\u3001\u8868\u64cd\u4f5c\u3001\u6570\u636e\u64cd\u4f5c\u3001\u67e5\u8be2\u3001\u7d22\u5f15\u3001\u89c6\u56fe\u7b49\u3002<\/p>\n<\/blockquote>\n\n\n\n

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1. SQLite \u6570\u636e\u5e93\u7ba1\u7406<\/strong><\/h2>\n\n\n\n

\u521b\u5efa\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n

SQLite \u4e0d\u9700\u8981\u624b\u52a8\u521b\u5efa\u6570\u636e\u5e93\uff0c\u53ea\u9700\u5728 sqlite3<\/code> \u547d\u4ee4\u540e\u6307\u5b9a\u6587\u4ef6\u540d\uff1a<\/p>\n\n\n\n

sqlite3 mydatabase.db<\/code><\/pre>\n\n\n\n
\u5982\u679c mydatabase.db<\/code> \u4e0d\u5b58\u5728\uff0c\u5219 SQLite \u4f1a\u81ea\u52a8\u521b\u5efa\u5b83\u3002<\/p>\n\n\n\n
\u6253\u5f00\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n
sqlite3 mydatabase.db<\/code><\/pre>\n\n\n\n
\u5220\u9664\u6570\u636e\u5e93<\/strong><\/h3>\n\n\n\n
SQLite \u6ca1\u6709 DROP DATABASE<\/code> \u8bed\u6cd5\uff0c\u76f4\u63a5\u5220\u9664\u6587\u4ef6\u5373\u53ef\uff1a<\/p>\n\n\n\n
rm mydatabase.db  # Linux\/macOS\ndel mydatabase.db # Windows<\/code><\/pre>\n\n\n\n
\n\n\n\n
2. SQLite \u8868\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n
\u521b\u5efa\u8868<\/strong><\/h3>\n\n\n\n
CREATE TABLE users (\n    id INTEGER PRIMARY KEY AUTOINCREMENT,\n    name TEXT NOT NULL,\n    age INTEGER DEFAULT 18,\n    email TEXT UNIQUE\n);<\/code><\/pre>\n\n\n\n
\u67e5\u770b\u8868\u7ed3\u6784<\/strong><\/h3>\n\n\n\n
.schema users<\/code><\/pre>\n\n\n\n
\u4fee\u6539\u8868<\/strong><\/h3>\n\n\n\n
SQLite \u4e0d\u652f\u6301 ALTER TABLE<\/code> \u5220\u9664\u5217\uff0c\u53ea\u80fd\u6dfb\u52a0\u5217\u6216\u91cd\u547d\u540d\u8868\uff1a<\/p>\n\n\n\n
ALTER TABLE users ADD COLUMN phone TEXT;\nALTER TABLE users RENAME TO customers;<\/code><\/pre>\n\n\n\n
\u5220\u9664\u8868<\/strong><\/h3>\n\n\n\n
DROP TABLE users;<\/code><\/pre>\n\n\n\n
\n\n\n\n
3. SQLite \u6570\u636e\u64cd\u4f5c<\/strong><\/h2>\n\n\n\n
\u63d2\u5165\u6570\u636e<\/strong><\/h3>\n\n\n\n
INSERT INTO users (name, age, email) VALUES ('Alice', 25, 'alice@example.com');\nINSERT INTO users (name, email) VALUES ('Bob', 'bob@example.com');  -- age \u9ed8\u8ba4\u503c18<\/code><\/pre>\n\n\n\n
\u67e5\u8be2\u6570\u636e<\/strong><\/h3>\n\n\n\n
SELECT * FROM users;\nSELECT name, age FROM users WHERE age > 20;\nSELECT * FROM users ORDER BY age DESC;\nSELECT COUNT(*) FROM users;<\/code><\/pre>\n\n\n\n
\u66f4\u65b0\u6570\u636e<\/strong><\/h3>\n\n\n\n
UPDATE users SET age = 30 WHERE name = 'Alice';<\/code><\/pre>\n\n\n\n
\u5220\u9664\u6570\u636e<\/strong><\/h3>\n\n\n\n
DELETE FROM users WHERE name = 'Bob';\nDELETE FROM users;  -- \u6e05\u7a7a\u8868<\/code><\/pre>\n\n\n\n
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4. SQLite \u67e5\u8be2<\/strong><\/h2>\n\n\n\n
\u57fa\u672c\u67e5\u8be2<\/strong><\/h3>\n\n\n\n
SELECT * FROM users;\nSELECT name, age FROM users WHERE age > 20;<\/code><\/pre>\n\n\n\n
\u6761\u4ef6\u67e5\u8be2<\/strong><\/h3>\n\n\n\n
SELECT * FROM users WHERE age BETWEEN 20 AND 30;\nSELECT * FROM users WHERE name LIKE 'A%';  -- \u4ee5 A \u5f00\u5934<\/code><\/pre>\n\n\n\n
\u6392\u5e8f<\/strong><\/h3>\n\n\n\n
SELECT * FROM users ORDER BY age DESC;<\/code><\/pre>\n\n\n\n
\u5206\u7ec4<\/strong><\/h3>\n\n\n\n
SELECT age, COUNT(*) FROM users GROUP BY age;<\/code><\/pre>\n\n\n\n
LIMIT \u5206\u9875<\/strong><\/h3>\n\n\n\n
SELECT * FROM users LIMIT 10;  -- \u53d6\u524d 10 \u6761\nSELECT * FROM users LIMIT 10 OFFSET 20;  -- \u4ece\u7b2c 21 \u6761\u5f00\u59cb\u53d6 10 \u6761<\/code><\/pre>\n\n\n\n
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5. SQLite \u7ea6\u675f<\/strong><\/h2>\n\n\n\n
\u7ea6\u675f<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
PRIMARY KEY<\/code><\/td>\u4e3b\u952e\uff0c\u552f\u4e00\u4e14\u975e\u7a7a<\/td><\/tr>
AUTOINCREMENT<\/code><\/td>\u81ea\u589e\uff0c\u914d\u5408 INTEGER PRIMARY KEY<\/code> \u4f7f\u7528<\/td><\/tr>
NOT NULL<\/code><\/td>\u4e0d\u80fd\u4e3a\u7a7a<\/td><\/tr>
UNIQUE<\/code><\/td>\u552f\u4e00<\/td><\/tr>
CHECK<\/code><\/td>\u7ea6\u675f<\/td><\/tr>
DEFAULT<\/code><\/td>\u9ed8\u8ba4\u503c<\/td><\/tr>
FOREIGN KEY<\/code><\/td>\u5916\u952e<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u793a\u4f8b\uff1a<\/p>\n\n\n\n
CREATE TABLE orders (\n    id INTEGER PRIMARY KEY AUTOINCREMENT,\n    user_id INTEGER,\n    amount REAL CHECK(amount > 0),\n    FOREIGN KEY (user_id) REFERENCES users(id)\n);<\/code><\/pre>\n\n\n\n
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6. SQLite \u4e8b\u52a1<\/strong><\/h2>\n\n\n\n
\u5f00\u542f\u4e8b\u52a1<\/strong><\/h3>\n\n\n\n
BEGIN TRANSACTION;<\/code><\/pre>\n\n\n\n
\u63d0\u4ea4\u4e8b\u52a1<\/strong><\/h3>\n\n\n\n
COMMIT;<\/code><\/pre>\n\n\n\n
\u56de\u6eda\u4e8b\u52a1<\/strong><\/h3>\n\n\n\n
ROLLBACK;<\/code><\/pre>\n\n\n\n
\u793a\u4f8b\uff1a<\/p>\n\n\n\n
BEGIN TRANSACTION;\nINSERT INTO users (name, age) VALUES ('Charlie', 40);\nROLLBACK;  -- \u64a4\u9500\u63d2\u5165\u64cd\u4f5c<\/code><\/pre>\n\n\n\n
\n\n\n\n
7. SQLite \u7d22\u5f15<\/strong><\/h2>\n\n\n\n
\u521b\u5efa\u7d22\u5f15<\/strong><\/h3>\n\n\n\n
CREATE INDEX idx_users_name ON users (name);<\/code><\/pre>\n\n\n\n
\u5220\u9664\u7d22\u5f15<\/strong><\/h3>\n\n\n\n
DROP INDEX idx_users_name;<\/code><\/pre>\n\n\n\n
\n\n\n\n
8. SQLite \u89c6\u56fe<\/strong><\/h2>\n\n\n\n
\u521b\u5efa\u89c6\u56fe<\/strong><\/h3>\n\n\n\n
CREATE VIEW user_names AS\nSELECT id, name FROM users;<\/code><\/pre>\n\n\n\n
\u67e5\u8be2\u89c6\u56fe<\/strong><\/h3>\n\n\n\n
SELECT * FROM user_names;<\/code><\/pre>\n\n\n\n
\u5220\u9664\u89c6\u56fe<\/strong><\/h3>\n\n\n\n
DROP VIEW user_names;<\/code><\/pre>\n\n\n\n
\n\n\n\n
9. SQLite \u89e6\u53d1\u5668<\/strong><\/h2>\n\n\n\n
CREATE TRIGGER user_insert_trigger\nAFTER INSERT ON users\nBEGIN\n    INSERT INTO logs (message) VALUES ('New user added: ' || NEW.name);\nEND;<\/code><\/pre>\n\n\n\n
\n\n\n\n
10. SQLite JSON \u652f\u6301<\/strong><\/h2>\n\n\n\n
SQLite \u652f\u6301 JSON \u89e3\u6790\uff1a<\/p>\n\n\n\n
SELECT json_extract('{\"name\": \"Alice\", \"age\": 25}', '$.name');<\/code><\/pre>\n\n\n\n
\n\n\n\n
\u603b\u7ed3<\/strong><\/h3>\n\n\n\n
\u5206\u7c7b<\/th>\u8bed\u6cd5<\/th><\/tr><\/thead>
\u6570\u636e\u5e93\u7ba1\u7406<\/strong><\/td>sqlite3 mydatabase.db<\/code> rm mydatabase.db<\/code><\/td><\/tr>
\u8868\u7ba1\u7406<\/strong><\/td>CREATE TABLE<\/code> DROP TABLE<\/code> ALTER TABLE<\/code><\/td><\/tr>
\u6570\u636e\u64cd\u4f5c<\/strong><\/td>INSERT<\/code> SELECT<\/code> UPDATE<\/code> DELETE<\/code><\/td><\/tr>
\u4e8b\u52a1<\/strong><\/td>BEGIN TRANSACTION<\/code> COMMIT<\/code> ROLLBACK<\/code><\/td><\/tr>
\u7d22\u5f15<\/strong><\/td>CREATE INDEX<\/code> DROP INDEX<\/code><\/td><\/tr>
\u89c6\u56fe<\/strong><\/td>CREATE VIEW<\/code> DROP VIEW<\/code><\/td><\/tr>
\u89e6\u53d1\u5668<\/strong><\/td>CREATE TRIGGER<\/code> DROP TRIGGER<\/code><\/td><\/tr>
JSON<\/strong><\/td>json_extract()<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
SQLite \u8bed\u6cd5\u7b80\u5355\u4e14\u5f3a\u5927\uff0c\u53ef\u4ee5\u4ece\u8868\u7684\u521b\u5efa\u548c\u6570\u636e\u63d2\u5165\u5f00\u59cb\uff01\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
SQLite \u8bed\u6cd5\u5927\u90e8\u5206\u4e0e\u6807\u51c6 SQL \u517c\u5bb9\uff0c\u4f46\u7531\u4e8e\u5176\u8f7b\u91cf\u7ea7\u7279\u6027\uff0c\u6709\u4e9b SQL \u529f\u80fd\u6709\u6240\u4e0d\u540c\u3002\u4e0b\u9762\u662f SQLi […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[76],"tags":[],"class_list":["post-2301","post","type-post","status-publish","format-standard","hentry","category-sqlite"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2301","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=2301"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2301\/revisions"}],"predecessor-version":[{"id":2302,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2301\/revisions\/2302"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2301"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2301"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2301"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}