{"id":3970,"date":"2023-12-22T17:59:26","date_gmt":"2023-12-22T09:59:26","guid":{"rendered":"http:\/\/192.168.31.200\/?p=3970"},"modified":"2023-12-22T18:01:02","modified_gmt":"2023-12-22T10:01:02","slug":"python%e4%bb%a3%e7%a0%81%e6%93%8d%e4%bd%9csqlite3%e6%95%b0%e6%8d%ae%e5%ba%93crud","status":"publish","type":"post","link":"http:\/\/xc.ipyingshe.net:5347\/?p=3970","title":{"rendered":"python\u4ee3\u7801\u64cd\u4f5csqlite3\u6570\u636e\u5e93CRUD"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>#python sqlite3\u6570\u636e\u5e93\u521b\u5efa\u3001\u589e\u3001\u5220\u3001\u67e5\u3001\u6539\nimport sqlite3\n\n#\u751f\u6210\u4e00\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u5bf9\u8c61conn\nconn = sqlite3.connect(\"test.db\") # \u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\n#\u60a8\u53ef\u4ee5\u901a\u8fc7\u8fde\u63a5\u5bf9\u8c61\u521b\u5efa\u4e00\u4e2a\u6e38\u6807\u5bf9\u8c61\uff0c\u7528\u4e8e\u6267\u884c SQL \u8bed\u53e5\uff0c\u4f8b\u5982\uff1a\n \ncursor = conn.cursor()\ncursor.execute(\"create table if not exists user (id integer primary key, name text, age integer)\") # \u521b\u5efa\u4e00\u4e2a user \u8868\ncursor.execute(\"insert into user (id, name, age) values (1, 'Alice', 20)\")  # \u63d2\u5165\u4e00\u6761\u8bb0\u5f55\nfor i in range(2, 10):  \n    cursor.execute(\"insert into user (name, age) values ('cnliutz', {})\".format(60+i))\n    # Replace 'Unknown' with the actual name\n    data = ('John Doe'+str(i), 25+i)\n    cursor.execute(\"insert into user (name, age) values ( ?, ?)\", data)\n\nconn.commit() # \u63d0\u4ea4\u4e8b\u52a1\n \n#\u60a8\u53ef\u4ee5\u4f7f\u7528\u6e38\u6807\u5bf9\u8c61\u7684 fetchone(), fetchmany() \u6216 fetchall() \u65b9\u6cd5\u6765\u83b7\u53d6\u67e5\u8be2\u7ed3\u679c\u96c6\u4e2d\u7684\u6570\u636e\uff0c\u4f8b\u5982\uff1a\n \ncursor.execute(\"select * from user where age &gt; 18\") # \u67e5\u8be2\u5e74\u9f84\u5927\u4e8e 18 \u7684\u7528\u6237\nusers = cursor.fetchall() # \u83b7\u53d6\u6240\u6709\u7b26\u5408\u6761\u4ef6\u7684\u7528\u6237\nfor user in users:\n    print(user) # \u6253\u5370\u6bcf\u4e2a\u7528\u6237\u7684\u4fe1\u606f\n \n#\u60a8\u53ef\u4ee5\u4f7f\u7528\u6e38\u6807\u5bf9\u8c61\u7684 execute() \u6216 executemany() \u65b9\u6cd5\u6765\u66f4\u65b0\u6216\u5220\u9664\u6570\u636e\uff0c\u4f8b\u5982\uff1a\n \ncursor.execute(\"update user set age = 21 where id = 1\") # \u66f4\u65b0 id \u4e3a 1 \u7684\u7528\u6237\u7684\u5e74\u9f84\u4e3a 21\ncursor.executemany(\"delete from user where name = ?\", &#91;(\"Alice\",), (\"Bob\",)]) # \u5220\u9664\u540d\u5b57\u4e3a Alice \u6216 Bob \u7684\u7528\u6237\nconn.commit() # \u63d0\u4ea4\u4e8b\u52a1\n \n#\u6700\u540e\uff0c\u60a8\u9700\u8981\u5173\u95ed\u6e38\u6807\u548c\u8fde\u63a5\u5bf9\u8c61\uff0c\u4ee5\u91ca\u653e\u8d44\u6e90\uff0c\u4f8b\u5982\uff1a\n \ncursor.close()\nconn.close()<\/code><\/pre>\n\n\n\n<p><strong>\u6ce8\u610f\u63d2\u5165\u6570\u636e\u65f6\u7684\u7075\u6d3b\u6027<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ce8\u610f\u63d2\u5165\u6570\u636e\u65f6\u7684\u7075\u6d3b\u6027<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[],"class_list":["post-3970","post","type-post","status-publish","format-standard","hentry","category-2"],"_links":{"self":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/3970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3970"}],"version-history":[{"count":2,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/3970\/revisions"}],"predecessor-version":[{"id":3972,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=\/wp\/v2\/posts\/3970\/revisions\/3972"}],"wp:attachment":[{"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3970"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xc.ipyingshe.net:5347\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}