{"id":61447,"date":"2024-10-13T11:11:14","date_gmt":"2024-10-13T03:11:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61447\/"},"modified":"2024-10-13T11:11:14","modified_gmt":"2024-10-13T03:11:14","slug":"fmdb%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8d%87%e7%b4%9a%ef%bc%9a%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%ef%bc%9f-fmdb%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8d%87%e7%b4%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61447\/","title":{"rendered":"FMDB\u6578\u64da\u5eab\u5347\u7d1a\uff1a\u5982\u4f55\u8655\u7406\uff1f (fmdb\u6578\u64da\u5eab\u5347\u7d1a)"},"content":{"rendered":"<h1 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\u5275\u5efa\u5347\u7d1a\u8173\u672c<\/h3>\n<p>\u5347\u7d1a\u8173\u672c\u662f\u57f7\u884c\u6578\u64da\u5eab\u7d50\u69cb\u8b8a\u66f4\u7684\u95dc\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u5347\u7d1a\u8173\u672c\u793a\u4f8b\uff1a<\/p>\n<pre><code>ALTER TABLE users ADD COLUMN age INTEGER;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u5728\u201cusers\u201d\u8868\u4e2d\u6dfb\u52a0\u4e00\u500b\u540d\u70ba\u201cage\u201d\u7684\u6574\u6578\u985e\u578b\u5b57\u6bb5\u3002<\/p>\n<h3 id=\"3-%e5%af%a6%e6%96%bd%e5%8d%87%e7%b4%9a-SDHNRHtCZO\">3. \u5be6\u65bd\u5347\u7d1a<\/h3>\n<p>\u5728\u5be6\u65bd\u5347\u7d1a\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u73fe\u6709\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002\u4f7f\u7528FMDB\u9032\u884c\u5347\u7d1a\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>FMDatabase *db = [FMDatabase databaseWithPath:databasePath];\nif ([db open]) {\n    [db executeUpdate:@\"ALTER TABLE users ADD COLUMN age INTEGER;\"];\n    [db close];\n}<\/code><\/pre>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e5%8d%87%e7%b4%9a-SDHNRHtCZO\">4. \u6e2c\u8a66\u5347\u7d1a<\/h3>\n<p>\u5347\u7d1a\u5b8c\u6210\u5f8c\uff0c\u5fc5\u9808\u9032\u884c\u6e2c\u8a66\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u548c\u529f\u80fd\u6b63\u5e38\u3002\u53ef\u4ee5\u901a\u904e\u67e5\u8a62\u65b0\u6dfb\u52a0\u7684\u5b57\u6bb5\u4f86\u9a57\u8b49\u5347\u7d1a\u662f\u5426\u6210\u529f\uff1a<\/p>\n<pre><code>FMResultSet *results = [db executeQuery:@\"SELECT age FROM users;\"];\nwhile ([results next]) {\n    NSLog(@\"Age: %@\", [results stringForColumn:@\"age\"]);\n}<\/code><\/pre>\n<h2 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