{"id":2303,"date":"2025-03-04T08:28:03","date_gmt":"2025-03-04T00:28:03","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2303"},"modified":"2025-03-04T08:28:03","modified_gmt":"2025-03-04T00:28:03","slug":"sqlite-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/03\/04\/sqlite-%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b\/","title":{"rendered":"SQLite \u6570\u636e\u7c7b\u578b"},"content":{"rendered":"\n
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SQLite \u4f7f\u7528 \u52a8\u6001\u7c7b\u578b<\/strong>\uff0c\u4e0d\u540c\u4e8e\u4f20\u7edf\u7684 SQL \u6570\u636e\u5e93\uff08\u5982 MySQL\u3001PostgreSQL\uff09\u4f7f\u7528\u7684\u9759\u6001\u7c7b\u578b<\/strong>\u3002\u5728 SQLite \u4e2d\uff0c\u4e00\u4e2a\u5217\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u800c\u4e0d\u50cf MySQL \u90a3\u6837\u4e25\u683c\u9650\u5236\u3002<\/p>\n<\/blockquote>\n\n\n\n

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1. SQLite \u7684\u5b58\u50a8\u7c7b<\/strong><\/h2>\n\n\n\n

SQLite \u53ea\u6709 \u4e94\u79cd\u5b58\u50a8\u7c7b\uff08Storage Classes\uff09<\/strong>\uff0c\u800c\u4e0d\u662f\u4f20\u7edf SQL \u6570\u636e\u5e93\u7684\u591a\u4e2a\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n\n\n\n

\u5b58\u50a8\u7c7b<\/th>\u8bf4\u660e<\/th><\/tr><\/thead>
NULL<\/code><\/td>\u8be5\u503c\u4e3a\u7a7a\u503c\uff08NULL\uff09\u3002<\/td><\/tr>
INTEGER<\/code><\/td>\u6709\u7b26\u53f7\u6574\u6570\uff081\u30012\u30013\u3001100\u7b49\uff09\uff0c\u5360\u7528 1\u30012\u30013\u30014\u30016 \u6216 8 \u5b57\u8282\u3002<\/td><\/tr>
REAL<\/code><\/td>\u6d6e\u70b9\u6570\uff08\u5c0f\u6570\uff09\uff0c\u4f7f\u7528 8 \u5b57\u8282\u5b58\u50a8\u3002<\/td><\/tr>
TEXT<\/code><\/td>\u6587\u672c\u5b57\u7b26\u4e32\uff0cUTF-8\u3001UTF-16 \u7f16\u7801\u3002<\/td><\/tr>
BLOB<\/code><\/td>\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u5b58\u50a8\u4e3a\u8f93\u5165\u683c\u5f0f\uff0c\u9002\u7528\u4e8e\u56fe\u7247\u3001\u6587\u4ef6\u7b49\u3002<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
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2. SQLite \u7684\u6570\u636e\u7c7b\u578b\uff08\u7c7b\u578b\u4eb2\u548c\u6027\uff09<\/strong><\/h2>\n\n\n\n

SQLite \u6ca1\u6709\u4e25\u683c\u7684\u6570\u636e\u7c7b\u578b<\/strong>\uff0c\u4f46\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7c7b\u578b\u4eb2\u548c\u6027\uff08Type Affinity\uff09<\/strong>\uff0c\u7528\u4e8e\u4fdd\u8bc1\u6570\u636e\u5b58\u50a8\u7684\u5408\u7406\u6027\u3002<\/p>\n\n\n\n

SQLite \u5141\u8bb8\u4f60\u5728 CREATE TABLE<\/code> \u8bed\u53e5\u4e2d\u6307\u5b9a\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u8fd9\u4e9b\u7c7b\u578b\u4f1a\u88ab\u6620\u5c04\u5230\u5b58\u50a8\u7c7b\u3002\u4f8b\u5982\uff1a<\/p>\n\n\n\n

CREATE TABLE users (\n    id INTEGER PRIMARY KEY AUTOINCREMENT,\n    name TEXT NOT NULL,\n    age INTEGER,\n    balance REAL,\n    profile BLOB\n);<\/code><\/pre>\n\n\n\n
\u5728 SQLite \u5185\u90e8\uff0cINTEGER<\/code>\u3001REAL<\/code>\u3001TEXT<\/code>\u3001BLOB<\/code> \u5b9e\u9645\u4e0a\u4f1a\u6620\u5c04\u5230\u5b58\u50a8\u7c7b\u3002<\/p>\n\n\n\n
SQLite \u7c7b\u578b\u4eb2\u548c\u6027\u89c4\u5219<\/strong><\/h3>\n\n\n\n
SQLite \u8bc6\u522b\u7684\u6570\u636e\u7c7b\u578b\u4f1a\u6620\u5c04\u5230\u4e94\u79cd\u5b58\u50a8\u7c7b\uff1a<\/p>\n\n\n\n
\u6307\u5b9a\u7684\u6570\u636e\u7c7b\u578b<\/th>\u4eb2\u548c\u7c7b\u578b\uff08Affinity\uff09<\/th><\/tr><\/thead>
INT<\/code>, INTEGER<\/code>, BIGINT<\/code>, TINYINT<\/code><\/td>INTEGER<\/code><\/td><\/tr>
REAL<\/code>, FLOAT<\/code>, DOUBLE<\/code>, NUMERIC<\/code><\/td>REAL<\/code><\/td><\/tr>
CHAR<\/code>, TEXT<\/code>, VARCHAR<\/code>, CLOB<\/code><\/td>TEXT<\/code><\/td><\/tr>
BLOB<\/code><\/td>BLOB<\/code><\/td><\/tr>
BOOLEAN<\/code>, DATE<\/code>, DATETIME<\/code><\/td>NUMERIC<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\u4f8b\u5982\uff1a<\/p>\n\n\n\n
CREATE TABLE test (\n    col1 INT,        -- INTEGER\n    col2 VARCHAR(50), -- TEXT\n    col3 BOOLEAN,     -- NUMERIC\n    col4 REAL,        -- REAL\n    col5 BLOB         -- BLOB\n);<\/code><\/pre>\n\n\n\n
\u5728 SQLite \u4e2d\uff1a<\/p>\n\n\n\n
    \n
  • col1<\/code> \u4f1a\u88ab\u89c6\u4e3a INTEGER<\/code>\uff0c\u5373\u4f7f\u4f60\u5199\u7684\u662f INT<\/code>\u3002<\/li>\n\n\n\n
  • col2<\/code> \u4f1a\u88ab\u89c6\u4e3a TEXT<\/code>\uff0c\u5373\u4f7f\u4f60\u5199\u7684\u662f VARCHAR(50)<\/code>\u3002<\/li>\n\n\n\n
  • col3<\/code> \u4f1a\u88ab\u89c6\u4e3a NUMERIC<\/code>\uff0c\u4f46\u5b9e\u9645\u4e0a SQLite \u4ecd\u5141\u8bb8\u5b58\u50a8\u6574\u6570\u3002<\/li>\n\n\n\n
  • col4<\/code> \u4f1a\u88ab\u89c6\u4e3a REAL<\/code>\uff0c\u7528\u4e8e\u5b58\u50a8\u6d6e\u70b9\u6570\u3002<\/li>\n\n\n\n
  • col5<\/code> \u76f4\u63a5\u5b58\u50a8\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n
    3. SQLite \u7279\u6b8a\u6570\u636e\u7c7b\u578b<\/strong><\/h2>\n\n\n\n
    SQLite \u652f\u6301\u4e00\u4e9b\u7279\u6b8a\u6570\u636e\u7c7b\u578b\uff0c\u5c3d\u7ba1\u5b83\u4eec\u4ecd\u7136\u6620\u5c04\u5230\u4e94\u79cd\u5b58\u50a8\u7c7b\u4e4b\u4e00\u3002<\/p>\n\n\n\n
    (1) BOOLEAN\uff08\u5e03\u5c14\u503c\uff09<\/strong><\/h3>\n\n\n\n
    SQLite \u6ca1\u6709<\/strong> BOOLEAN<\/code> \u7c7b\u578b\uff0c\u4f46\u53ef\u4ee5\u7528 INTEGER<\/code> \u5b58\u50a8\uff1a<\/p>\n\n\n\n
    CREATE TABLE settings (\n    id INTEGER PRIMARY KEY,\n    is_enabled BOOLEAN -- \u5b9e\u9645\u5b58\u50a8\u4e3a INTEGER\n);<\/code><\/pre>\n\n\n\n
      \n
    • 0<\/code> \u4ee3\u8868 FALSE<\/code><\/li>\n\n\n\n
    • 1<\/code> \u4ee3\u8868 TRUE<\/code><\/li>\n<\/ul>\n\n\n\n
      (2) DATE \u548c DATETIME\uff08\u65e5\u671f\u548c\u65f6\u95f4\uff09<\/strong><\/h3>\n\n\n\n
      SQLite \u6ca1\u6709<\/strong> DATE<\/code> \u6216 DATETIME<\/code> \u7c7b\u578b\uff0c\u4f46\u53ef\u4ee5\u5b58\u50a8\u4e3a TEXT<\/code>\u3001INTEGER<\/code> \u6216 REAL<\/code>\uff1a<\/p>\n\n\n\n
      CREATE TABLE events (\n    id INTEGER PRIMARY KEY,\n    event_name TEXT,\n    event_date TEXT  -- \u53ef\u4ee5\u5b58\u50a8 '2025-03-04'\n);<\/code><\/pre>\n\n\n\n
      SQLite \u5904\u7406\u65e5\u671f\u7684\u65b9\u6cd5\uff1a<\/p>\n\n\n\n
        \n
      • TEXT<\/code>\uff08\u63a8\u8350\uff09\uff1a'YYYY-MM-DD HH:MM:SS'<\/code> \u683c\u5f0f<\/li>\n\n\n\n
      • REAL<\/code>\uff1a\u5b58\u50a8 \u81ea 1970-01-01 \u4ee5\u6765\u7684\u5929\u6570<\/strong><\/li>\n\n\n\n
      • INTEGER<\/code>\uff1a\u5b58\u50a8 UNIX \u65f6\u95f4\u6233\uff08\u79d2\u6570\uff09<\/strong><\/li>\n<\/ul>\n\n\n\n
        \u63d2\u5165\u65e5\u671f<\/strong><\/p>\n\n\n\n
        INSERT INTO events (event_name, event_date) VALUES ('Meeting', '2025-03-04 10:30:00');\nINSERT INTO events (event_name, event_date) VALUES ('Conference', strftime('%Y-%m-%d %H:%M:%S', 'now'));<\/code><\/pre>\n\n\n\n
        \u67e5\u8be2\u65e5\u671f<\/strong><\/p>\n\n\n\n
        SELECT * FROM events WHERE event_date > datetime('now', '-1 day');<\/code><\/pre>\n\n\n\n
        \n\n\n\n
        4. SQLite \u52a8\u6001\u6570\u636e\u5b58\u50a8<\/strong><\/h2>\n\n\n\n
        SQLite \u4e0d\u5f3a\u5236\u5217\u7684\u6570\u636e\u7c7b\u578b<\/strong>\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n
        CREATE TABLE test (col1 INTEGER);\nINSERT INTO test (col1) VALUES ('Hello'); -- \u5141\u8bb8\u63d2\u5165\u5b57\u7b26\u4e32\nSELECT * FROM test;<\/code><\/pre>\n\n\n\n
        SQLite \u4e0d\u4f1a\u62a5\u9519<\/strong>\uff0c\u4f46\u4f1a\u6839\u636e\u5b58\u50a8\u7c7b\u6765\u5b58\u50a8\u6570\u636e\uff1a<\/p>\n\n\n\n
          \n
        • col1<\/code> \u8bbe\u4e3a INTEGER<\/code>\uff0c\u4f46\u4ecd\u7136\u53ef\u4ee5\u5b58\u50a8\u5b57\u7b26\u4e32 \"Hello\"<\/code>\uff0c\u4f1a\u6309 TEXT<\/code> \u5904\u7406\u3002<\/li>\n\n\n\n
        • \u4f46\u5982\u679c col1<\/code> \u8bbe\u4e3a INTEGER PRIMARY KEY<\/code>\uff0c\u5219\u4e0d\u80fd\u5b58\u50a8\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          5. SQLite \u7c7b\u578b\u8f6c\u6362<\/strong><\/h2>\n\n\n\n
          SQLite \u5728\u5b58\u50a8\u548c\u67e5\u8be2\u65f6\u53ef\u80fd\u4f1a\u8f6c\u6362\u6570\u636e\u7c7b\u578b\uff1a<\/p>\n\n\n\n
          SELECT CAST('123' AS INTEGER); -- \u8fd4\u56de 123\nSELECT CAST(123 AS TEXT);      -- \u8fd4\u56de '123'\nSELECT CAST('3.14' AS REAL);   -- \u8fd4\u56de 3.14<\/code><\/pre>\n\n\n\n
          \n\n\n\n
          6. SQLite \u6570\u636e\u7c7b\u578b vs \u4f20\u7edf\u6570\u636e\u5e93<\/strong><\/h2>\n\n\n\n
          \u6570\u636e\u7c7b\u578b<\/th>SQLite \u5b58\u50a8\u7c7b<\/th>MySQL<\/th>PostgreSQL<\/th><\/tr><\/thead>
          INTEGER<\/code><\/td>INTEGER<\/code><\/td>TINYINT<\/code>\u3001SMALLINT<\/code>\u3001MEDIUMINT<\/code>\u3001BIGINT<\/code><\/td>SMALLINT<\/code>\u3001BIGINT<\/code><\/td><\/tr>
          REAL<\/code><\/td>REAL<\/code><\/td>FLOAT<\/code>\u3001DOUBLE<\/code><\/td>FLOAT<\/code>\u3001DOUBLE PRECISION<\/code><\/td><\/tr>
          TEXT<\/code><\/td>TEXT<\/code><\/td>VARCHAR(n)<\/code>\u3001TEXT<\/code><\/td>VARCHAR(n)<\/code>\u3001TEXT<\/code><\/td><\/tr>
          BLOB<\/code><\/td>BLOB<\/code><\/td>BLOB<\/code><\/td>BYTEA<\/code><\/td><\/tr>
          BOOLEAN<\/code><\/td>NUMERIC<\/code>\uff080\/1\uff09<\/td>TINYINT(1)<\/code><\/td>BOOLEAN<\/code><\/td><\/tr>
          DATE\/DATETIME<\/code><\/td>TEXT\/INTEGER\/REAL<\/code><\/td>DATETIME<\/code><\/td>TIMESTAMP<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
          \n\n\n\n
          7. \u4ec0\u4e48\u65f6\u5019\u4f7f\u7528 SQLite \u7684\u6570\u636e\u7c7b\u578b<\/strong><\/h2>\n\n\n\n
            \n
          • \u5b58\u50a8\u6574\u6570<\/strong> \u2192 \u4f7f\u7528 INTEGER<\/code><\/li>\n\n\n\n
          • \u5b58\u50a8\u5c0f\u6570<\/strong> \u2192 \u4f7f\u7528 REAL<\/code><\/li>\n\n\n\n
          • \u5b58\u50a8\u6587\u672c<\/strong> \u2192 \u4f7f\u7528 TEXT<\/code><\/li>\n\n\n\n
          • \u5b58\u50a8\u4e8c\u8fdb\u5236\u6587\u4ef6\uff08\u56fe\u7247\u3001\u97f3\u9891\u7b49\uff09<\/strong> \u2192 \u4f7f\u7528 BLOB<\/code><\/li>\n\n\n\n
          • \u5b58\u50a8\u65e5\u671f\/\u65f6\u95f4<\/strong> \u2192 \u4f7f\u7528 TEXT<\/code> \u6216 INTEGER<\/code>\uff08UNIX \u65f6\u95f4\u6233\uff09<\/li>\n<\/ul>\n\n\n\n
            \n\n\n\n
            \u603b\u7ed3<\/strong><\/h2>\n\n\n\n
              \n
            1. SQLite \u53ea\u6709 5 \u79cd\u5b58\u50a8\u7c7b\uff1aNULL<\/code>\u3001INTEGER<\/code>\u3001REAL<\/code>\u3001TEXT<\/code>\u3001BLOB<\/code>\u3002<\/li>\n\n\n\n
            2. SQLite \u4e0d\u5f3a\u5236\u6570\u636e\u7c7b\u578b<\/strong>\uff0c\u4f46\u6709\u7c7b\u578b\u4eb2\u548c\u6027<\/strong>\u3002<\/li>\n\n\n\n
            3. BOOLEAN<\/code>\u3001DATE<\/code>\u3001DATETIME<\/code> \u5b9e\u9645\u4e0a\u4f1a\u6620\u5c04\u5230 NUMERIC<\/code> \u6216 TEXT<\/code>\u3002<\/li>\n\n\n\n
            4. SQLite \u652f\u6301\u52a8\u6001\u6570\u636e\u5b58\u50a8<\/strong>\uff0c\u53ef\u4ee5\u5b58\u50a8\u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\uff0c\u4f46\u5efa\u8bae\u9075\u5faa\u7c7b\u578b\u4eb2\u548c\u6027\u3002<\/li>\n\n\n\n
            5. \u9002\u5f53\u4f7f\u7528 CAST()<\/code> \u8fdb\u884c\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u3002<\/li>\n<\/ol>\n\n\n\n
              \u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/strong><\/p>\n\n\n\n
              <\/p>\n","protected":false},"excerpt":{"rendered":"
              SQLite \u4f7f\u7528 \u52a8\u6001\u7c7b\u578b\uff0c\u4e0d\u540c\u4e8e\u4f20\u7edf\u7684 SQL \u6570\u636e\u5e93\uff08\u5982 MySQL\u3001PostgreSQL\uff09\u4f7f\u7528\u7684\u9759\u6001\u7c7b […]<\/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-2303","post","type-post","status-publish","format-standard","hentry","category-sqlite"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2303","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=2303"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2303\/revisions"}],"predecessor-version":[{"id":2304,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2303\/revisions\/2304"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2303"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2303"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2303"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}