\u4e00\u3001\u6982\u8ff0<\/p>\n
\u5206\u8868\u662f\u4e2a\u76ee\u524d\u7b97\u662f\u6bd4\u8f83\u7092\u7684\u6bd4\u8f83\u6d41\u884c\u7684\u6982\u5ff5\uff0c\u7279\u522b\u662f\u5728\u5927\u8d1f\u8f7d\u7684\u60c5\u51b5\u4e0b\uff0c\u5206\u8868\u662f\u4e00\u4e2a\u826f\u597d\u5206\u6563\u6570\u636e\u5e93\u538b\u529b\u7684\u597d\u65b9\u6cd5\u3002<\/p>\n
\u9996\u5148\u8981\u4e86\u89e3\u4e3a\u4ec0\u4e48\u8981\u5206\u8868\uff0c\u5206\u8868\u7684\u597d\u5904\u662f\u4ec0\u4e48\u3002\u6211\u4eec\u5148\u6765\u5927\u6982\u4e86\u89e3\u4ee5\u4e0b\u4e00\u4e2a\u6570\u636e\u5e93\u6267\u884cSQL\u7684\u8fc7\u7a0b\uff1a
\n\u63a5\u6536\u5230SQL –> \u653e\u5165SQL\u6267\u884c\u961f\u5217 –> \u4f7f\u7528\u5206\u6790\u5668\u5206\u89e3SQL –> \u6309\u7167\u5206\u6790\u7ed3\u679c\u8fdb\u884c\u6570\u636e\u7684\u63d0\u53d6\u6216\u8005\u4fee\u6539 –> \u8fd4\u56de\u5904\u7406\u7ed3\u679c<\/p>\n
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\u9501\u8868\u76f4\u63a5\u5bfc\u81f4\u7684\u540e\u679c\u662f\u4ec0\u4e48\uff1f\u5c31\u662f\u5927\u91cf\u7684SQL\u65e0\u6cd5\u7acb\u5373\u6267\u884c\uff0c\u5fc5\u987b\u7b49\u961f\u5217\u524d\u9762\u7684SQL\u5168\u90e8\u6267\u884c\u5b8c\u6bd5\u624d\u80fd\u7ee7\u7eed\u6267\u884c\u3002\u8fd9\u4e2a\u65e0\u6cd5\u6267\u884c\u7684SQL\u5c31\u4f1a\u5bfc\u81f4\u6ca1\u6709\u7ed3\u679c\uff0c\u6216\u8005\u5ef6\u8fdf\u4e25\u91cd\uff0c\u5f71\u54cd\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n
\u7279\u522b\u662f\u5bf9\u4e8e\u4e00\u4e9b\u4f7f\u7528\u6bd4\u8f83\u9891\u7e41\u7684\u8868\uff0c\u6bd4\u5982SNS\u7cfb\u7edf\u4e2d\u7684\u7528\u6237\u4fe1\u606f\u8868\u3001\u8bba\u575b\u7cfb\u7edf\u4e2d\u7684\u5e16\u5b50\u8868\u7b49\u7b49\uff0c\u90fd\u662f\u8bbf\u95ee\u91cf\u5927\u5f88\u5927\u7684\u8868\uff0c\u4e3a\u4e86\u4fdd\u8bc1\u6570\u636e\u7684\u5feb\u901f\u63d0\u53d6\u8fd4\u56de\u7ed9\u7528\u6237\uff0c\u5fc5\u987b\u4f7f\u7528\u4e00\u4e9b\u5904\u7406\u65b9\u5f0f\u6765\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u8fd9\u4e2a\u5c31\u662f\u6211\u4eca\u5929\u8981\u804a\u5230\u7684\u5206\u8868\u6280\u672f\u3002<\/p>\n
\u5206\u8868\u6280\u672f\u987e\u540d\u601d\u4e49\uff0c\u5c31\u662f\u628a\u82e5\u5e72\u4e2a\u5b58\u50a8\u76f8\u540c\u7c7b\u578b\u6570\u636e\u7684\u8868\u5206\u6210\u51e0\u4e2a\u8868\u5206\u8868\u5b58\u50a8\uff0c\u5728\u63d0\u53d6\u6570\u636e\u7684\u65f6\u5019\uff0c\u4e0d\u540c\u7684\u7528\u6237\u8bbf\u95ee\u4e0d\u540c\u7684\u8868\uff0c\u4e92\u4e0d\u51b2\u7a81\uff0c\u51cf\u5c11\u9501\u8868\u7684\u51e0\u7387\u3002\u6bd4\u5982\uff0c\u76ee\u524d\u4fdd\u5b58\u7528\u6237\u5206\u8868\u6709\u4e24\u4e2a\u8868\uff0c\u4e00\u4e2a\u662fuser_1\u8868\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f user_2 \u8868\uff0c\u4e24\u4e2a\u8868\u4fdd\u5b58\u4e86\u4e0d\u540c\u7684\u7528\u6237\u4fe1\u606f\uff0cuser_1 \u4fdd\u5b58\u4e86\u524d10\u4e07\u7684\u7528\u6237\u4fe1\u606f\uff0cuser_2\u4fdd\u5b58\u4e86\u540e10\u4e07\u540d\u7528\u6237\u7684\u4fe1\u606f\uff0c\u73b0\u5728\u5982\u679c\u540c\u65f6\u67e5\u8be2\u7528\u6237 heiyeluren1 \u548c heiyeluren2 \u8fd9\u4e2a\u4e24\u4e2a\u7528\u6237\uff0c\u90a3\u4e48\u5c31\u662f\u5206\u8868\u4ece\u4e0d\u540c\u7684\u8868\u63d0\u53d6\u51fa\u6765\uff0c\u51cf\u5c11\u9501\u8868\u7684\u53ef\u80fd\u3002<\/p>\n
\u6211\u4e0b\u9762\u8981\u8bb2\u8ff0\u7684\u4e24\u79cd\u5206\u8868\u65b9\u6cd5\u6211\u81ea\u5df1\u90fd\u6ca1\u6709\u5b9e\u9a8c\u8fc7\uff0c\u4e0d\u4fdd\u8bc1\u51c6\u786e\u80fd\u7528\uff0c\u53ea\u662f\u63d0\u4f9b\u4e00\u4e2a\u8bbe\u8ba1\u601d\u8def\u3002\u4e0b\u9762\u5173\u4e8e\u5206\u8868\u7684\u4f8b\u5b50\u6211\u5047\u8bbe\u662f\u5728\u4e00\u4e2a\u8d34\u5427\u7cfb\u7edf\u7684\u57fa\u7840\u4e0a\u6765\u8fdb\u884c\u5904\u7406\u548c\u6784\u5efa\u7684\u3002\uff08\u5982\u679c\u6ca1\u6709\u7528\u8fc7\u8d34\u5427\u7684\u7528\u6237\u8d76\u7d27Google\u4e00\u4e0b\uff09<\/p>\n
\u4e8c\u3001\u57fa\u4e8e\u57fa\u7840\u8868\u7684\u5206\u8868\u5904\u7406<\/p>\n
\u8fd9\u4e2a\u57fa\u4e8e\u57fa\u7840\u8868\u7684\u5206\u8868\u5904\u7406\u65b9\u5f0f\u5927\u81f4\u7684\u601d\u60f3\u5c31\u662f\uff1a\u4e00\u4e2a\u4e3b\u8981\u8868\uff0c\u4fdd\u5b58\u4e86\u6240\u6709\u7684\u57fa\u672c\u4fe1\u606f\uff0c\u5982\u679c\u67d0\u4e2a\u9879\u76ee\u9700\u8981\u627e\u5230\u5b83\u6240\u5b58\u50a8\u7684\u8868\uff0c\u90a3\u4e48\u5fc5\u987b\u4ece\u8fd9\u4e2a\u57fa\u7840\u8868\u4e2d\u67e5\u627e\u51fa\u5bf9\u5e94\u7684\u8868\u540d\u7b49\u9879\u76ee\uff0c\u597d\u76f4\u63a5\u8bbf\u95ee\u8fd9\u4e2a\u8868\u3002\u5982\u679c\u89c9\u5f97\u8fd9\u4e2a\u57fa\u7840\u8868\u901f\u5ea6\u4e0d\u591f\u5feb\uff0c\u53ef\u4ee5\u5b8c\u5168\u628a\u6574\u4e2a\u57fa\u7840\u8868\u4fdd\u5b58\u5728\u7f13\u5b58\u6216\u8005\u5185\u5b58\u4e2d\uff0c\u65b9\u4fbf\u6709\u6548\u7684\u67e5\u8be2\u3002<\/p>\n
\u6211\u4eec\u57fa\u4e8e\u8d34\u5427\u7684\u60c5\u51b5\uff0c\u6784\u5efa\u5047\u8bbe\u5982\u4e0b\u76843\u5f20\u8868\uff1a<\/p>\n
1. \u8d34\u5427\u7248\u5757\u8868: \u4fdd\u5b58\u8d34\u5427\u4e2d\u7248\u5757\u7684\u4fe1\u606f
\n2. \u8d34\u5427\u4e3b\u9898\u8868\uff1a\u4fdd\u5b58\u8d34\u5427\u4e2d\u7248\u5757\u4e2d\u7684\u4e3b\u9898\u4fe1\u606f\uff0c\u7528\u4e8e\u6d4f\u89c8
\n3. \u8d34\u5427\u56de\u590d\u8868\uff1a\u4fdd\u5b58\u4e3b\u9898\u7684\u539f\u59cb\u5185\u5bb9\u548c\u56de\u590d\u5185\u5bb9<\/p>\n
\u201c\u8d34\u5427\u7248\u5757\u8868\u201d\u5305\u542b\u5982\u4e0b\u5b57\u6bb5\uff1a
\n\u7248\u5757ID board_id int(10)
\n\u7248\u5757\u540d\u79f0 board_name char(50)
\n\u5b50\u8868ID table_id smallint(5)
\n\u4ea7\u751f\u65f6\u95f4 created datetime<\/p>\n
\u201c\u8d34\u5427\u4e3b\u9898\u8868\u201d\u5305\u542b\u5982\u4e0b\u5b57\u6bb5\uff1a
\n\u4e3b\u9898ID topic_id int(10)
\n\u4e3b\u9898\u540d\u79f0 topic_name char(255)
\n\u7248\u5757ID board_id int(10)
\n\u521b\u5efa\u65f6\u95f4 created datetime<\/p>\n
\u201c\u8d34\u5427\u56de\u590d\u8868\u201d\u7684\u5b57\u6bb5\u5982\u4e0b\uff1a
\n\u56de\u590dID reply_id int(10)
\n\u56de\u590d\u5185\u5bb9 reply_text text
\n\u4e3b\u9898ID topic_id int(10)
\n\u7248\u5757ID board_id int(10)
\n\u521b\u5efa\u65f6\u95f4 created datetime<\/p>\n
\u90a3\u4e48\u4e0a\u9762\u4fdd\u5b58\u4e86\u6211\u4eec\u6574\u4e2a\u8d34\u5427\u4e2d\u7684\u8868\u7ed3\u6784\u4fe1\u606f\uff0c\u4e09\u4e2a\u8868\u5bf9\u5e94\u7684\u5173\u7cfb\u662f\uff1a<\/p>\n
\u7248\u5757 –> \u591a\u4e2a\u4e3b\u9898
\n\u4e3b\u9898 –> \u591a\u4e2a\u56de\u590d<\/p>\n
\u90a3\u4e48\u5c31\u662f\u8bf4\uff0c\u8868\u6587\u4ef6\u5927\u5c0f\u7684\u5173\u7cfb\u662f\uff1a
\n\u7248\u5757\u8868\u6587\u4ef6 < \u4e3b\u9898\u8868\u6587\u4ef6 < \u56de\u590d\u8868\u6587\u4ef6<\/p>\n
\u6240\u4ee5\u57fa\u672c\u53ef\u4ee5\u786e\u5b9a\u9700\u8981\u5bf9\u4e3b\u9898\u8868\u548c\u56de\u590d\u8868\u8fdb\u884c\u5206\u8868\uff0c\u5df2\u589e\u52a0\u6211\u4eec\u6570\u636e\u68c0\u7d22\u67e5\u8be2\u66f4\u6539\u65f6\u5019\u7684\u901f\u5ea6\u548c\u6027\u80fd\u3002<\/p>\n
\u770b\u4e86\u4e0a\u9762\u7684\u8868\u7ed3\u6784\uff0c\u4f1a\u660e\u663e\u53d1\u73b0\uff0c\u5728\u201c\u7248\u5757\u8868\u201d\u4e2d\u4fdd\u5b58\u4e86\u4e00\u4e2a”table_id”\u5b57\u6bb5\uff0c\u8fd9\u4e2a\u5b57\u6bb5\u5c31\u662f\u7528\u4e8e\u4fdd\u5b58\u4e00\u4e2a\u7248\u5757\u5bf9\u5e94\u7684\u4e3b\u9898\u548c\u56de\u590d\u90fd\u662f\u5206\u8868\u4fdd\u5b58\u5728\u4ec0\u4e48\u8868\u91cc\u7684\u3002<\/p>\n
\u6bd4\u5982\u6211\u4eec\u6709\u4e00\u4e2a\u53eb\u505a\u201cPHP\u201d\u7684\u8d34\u5427\uff0cboard_id\u662f1\uff0c\u5b50\u8868ID\u4e5f\u662f1\uff0c\u90a3\u4e48\u8fd9\u6761\u8bb0\u5f55\u5c31\u662f\uff1a<\/p>\n
board_id | board_name | table_id | created
\n1 | PHP | 1 | 2007-01-19 00:30:12<\/p>\n
\u76f8\u5e94\u7684\uff0c\u5982\u679c\u6211\u9700\u8981\u63d0\u53d6\u201cPHP\u201d\u5427\u91cc\u7684\u6240\u6709\u4e3b\u9898\uff0c\u90a3\u4e48\u5c31\u5fc5\u987b\u6309\u7167\u8868\u91cc\u4fdd\u5b58\u7684table_id\u6765\u7ec4\u5408\u4e00\u4e2a\u5b58\u50a8\u4e86\u4e3b\u9898\u7684\u8868\u540d\u79f0\uff0c\u6bd4\u5982\u6211\u4eec\u4e3b\u9898\u8868\u7684\u524d\u7f00\u662f\u201ctopic_\u201d\uff0c\u90a3\u4e48\u7ec4\u5408\u51fa\u6765\u201cPHP\u201d\u5427\u5bf9\u5e94\u7684\u4e3b\u9898\u8868\u5e94\u8be5\u662f\uff1a\u201ctopic_1\u201d\uff0c\u90a3\u4e48\u6211\u4eec\u6267\u884c\uff1a<\/p>\n
SELECT * FROM topic_1 WHERE board_id = 1 ORDER BY topic_id DESC LIMIT 10<\/p>\n
\u8fd9\u6837\u5c31\u80fd\u591f\u83b7\u53d6\u8fd9\u4e2a\u4e3b\u9898\u4e0b\u9762\u56de\u590d\u5217\u8868\uff0c\u65b9\u4fbf\u6211\u4eec\u8fdb\u884c\u67e5\u770b\uff0c\u5982\u679c\u9700\u8981\u67e5\u770b\u67d0\u4e2a\u4e3b\u9898\u4e0b\u9762\u7684\u56de\u590d\uff0c\u6211\u4eec\u53ef\u4ee5\u7ee7\u7eed\u4f7f\u7528\u7248\u5757\u8868\u4e2d\u4fdd\u5b58\u7684\u201ctable_id\u201d\u6765\u8fdb\u884c\u67e5\u8be2\u3002\u6bd4\u5982\u6211\u4eec\u56de\u590d\u8868\u7684\u524d\u7f00\u662f\u201creply_\u201d\uff0c\u90a3\u4e48\u5c31\u53ef\u4ee5\u7ec4\u5408\u51fa\u201cPHP\u201d\u5427\u7684ID\u4e3a1\u7684\u4e3b\u9898\u7684\u56de\u590d\uff1a<\/p>\n
SELECT * FROM reply_1 WHERE topic_id = 1 ORDER BY reply_id DESC LIMIT 10<\/p>\n
\u8fd9\u91cc\uff0c\u6211\u4eec\u80fd\u591f\u6e05\u6670\u7684\u770b\u5230\uff0c\u5176\u5b9e\u6211\u4eec\u8fd9\u91cc\u4f7f\u7528\u4e86\u57fa\u7840\u8868\uff0c\u57fa\u7840\u8868\u5c31\u662f\u6211\u4eec\u7684\u7248\u5757\u8868\u3002\u90a3\u4e48\u76f8\u5e94\u7684\uff0c\u80af\u5b9a\u4f1a\u8bf4\uff1a\u57fa\u7840\u8868\u7684\u6570\u636e\u91cf\u5927\u4e86\u4ee5\u540e\u5982\u4f55\u4fdd\u8bc1\u5b83\u7684\u901f\u5ea6\u548c\u6548\u7387\uff1f<\/p>\n
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function get_hash($id){
\n$str = bin2hex($id);
\n$hash = substr($str, 0, 4);
\nif (strlen($hash)<4){
\n$hash = str_pad($hash, 4, “0”);
\n}
\nreturn $hash;
\n}<\/p>\n
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2. \u8868\u6587\u4ef6\u95ee\u9898
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\u4e94\u3001\u603b\u7ed3<\/p>\n
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