{"id":311204,"date":"2024-05-20T22:09:34","date_gmt":"2024-05-20T14:09:34","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/311204.html"},"modified":"2024-05-20T22:09:46","modified_gmt":"2024-05-20T14:09:46","slug":"mysql-%e5%a4%9a%e8%a1%a8%e8%81%94%e5%90%88%e6%9f%a5%e8%af%a2%e8%af%ad%e5%8f%a5%e5%ba%94%e8%af%a5%e6%80%8e%e4%b9%88%e5%86%99","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/311204.html","title":{"rendered":"mysql \u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\u5e94\u8be5\u600e\u4e48\u5199"},"content":{"rendered":"

\"mysql<\/p>\n

MySQL\u4e2d\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u901a\u5e38\u662f\u901a\u8fc7JOIN\u5b50\u53e5\u6765\u5b9e\u73b0\u7684\uff0c\u5305\u62ecINNER JOIN\uff08\u5185\u8fde\u63a5\uff09\u3001LEFT JOIN\uff08\u5de6\u8fde\u63a5\uff09\u3001RIGHT JOIN\uff08\u53f3\u8fde\u63a5\uff09\u548cFULL OUTER JOIN\uff08\u5168\u5916\u8fde\u63a5\uff09\u7b49\u7c7b\u578b\u3002\u5177\u4f53\u9009\u62e9\u54ea\u79cd\u8fde\u63a5\u65b9\u5f0f\u53d6\u51b3\u4e8e\u67e5\u8be2\u9700\u6c42\u548c\u6d89\u53ca\u7684\u8868\u4e4b\u95f4\u7684\u6570\u636e\u5173\u7cfb\u3002INNER JOIN\u7528\u4e8e\u8fd4\u56de\u4e24\u4e2a\u8868\u4e2d\u6709\u5339\u914d\u7684\u8bb0\u5f55\uff0cLEFT JOIN\u4f1a\u8fd4\u56de\u5de6\u8868\u7684\u6240\u6709\u8bb0\u5f55\u4ee5\u53ca\u53f3\u8868\u4e2d\u5339\u914d\u7684\u8bb0\u5f55\uff08\u5982\u679c\u6ca1\u6709\u5339\u914d\u5219\u8fd4\u56deNULL\uff09\uff0cRIGHT JOIN\u5219\u76f8\u53cd\u3002\u800cFULL OUTER JOIN\u5219\u8fd4\u56de\u5de6\u53f3\u8868\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2a\u5339\u914d\u7684\u8bb0\u5f55\u3002<\/p>\n<\/p>\n

\u4f8b\u5982\uff0c\u8003\u8651\u4ee5\u4e0b\u4e24\u4e2a\u8868\uff1aorders<\/code>\uff08\u8ba2\u5355\u8868\uff09\u548ccustomers<\/code>\uff08\u5ba2\u6237\u8868\uff09\uff0c\u5b83\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u5171\u6709\u7684\u5b57\u6bb5customer_id<\/code>\u8fdb\u884c\u8fde\u63a5\u3002\u5047\u8bbe\u6211\u4eec\u8981\u67e5\u8be2\u6240\u6709\u8ba2\u5355\u53ca\u5176\u5bf9\u5e94\u7684\u5ba2\u6237\u4fe1\u606f\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8be2\uff1a<\/p>\n<\/p>\n

SELECT orders.order_id, customers.customer_name<\/p>\n
FROM orders<\/p>\n
INNER JOIN customers ON orders.customer_id = customers.id;<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u6761\u8bed\u53e5\u901a\u8fc7INNER JOIN<\/code>\u5173\u952e\u5b57\u5c06orders<\/code>\u548ccustomers<\/code>\u4e24\u4e2a\u8868\u8fde\u63a5\u8d77\u6765\uff0c\u5e76\u4e14\u901a\u8fc7ON<\/code>\u5b50\u53e5\u6307\u5b9a\u4e86\u8054\u5408\u7684\u6761\u4ef6\u4e3a\u4e24\u8868\u4e2dcustomer_id<\/code>\u548cid<\/code>\u7684\u503c\u76f8\u7b49\u3002<\/p>\n<\/p>\n
\u4e00\u3001MYSQL\u591a\u8868\u67e5\u8be2\u57fa\u7840<\/h3>\n<\/p>\n
\u591a\u8868\u67e5\u8be2\u662f\u65e5\u5e38\u5de5\u4f5c\u4e2d\u5e38\u89c1\u7684\u9700\u6c42\uff0c\u8981\u719f\u7ec3\u4f7f\u7528\uff0c\u5fc5\u987b\u638c\u63e1\u4ee5\u4e0b\u51e0\u4e2a\u57fa\u7840\u6982\u5ff5\u3002<\/p>\n<\/p>\n
\u5173\u4e8eJOIN<\/h4>\n<\/p>\n
JOIN\u5b50\u53e5<\/strong>\u7528\u4e8e\u7ed3\u5408\u4e24\u4e2a\u6216\u591a\u4e2a\u6570\u636e\u5e93\u8868\u4e2d\u901a\u8fc7\u5217\u4e4b\u95f4\u7684\u5173\u7cfb\u5bf9\u8bb0\u5f55\u8fdb\u884c\u8fde\u63a5\u3002\u5728\u591a\u8868\u67e5\u8be2\u4e2d\uff0c\u5173\u952e\u5728\u4e8e\u8981\u521b\u5efa\u5408\u9002\u7684\u8fde\u63a5\u6761\u4ef6\u3002<\/p>\n<\/p>\n
\u5173\u4e8e\u8054\u63a5\u7c7b\u578b<\/h4>\n<\/p>\n
\u8fde\u63a5\u7c7b\u578b\u51b3\u5b9a\u4e86\u67e5\u8be2\u7ed3\u679c\u4e2d\u8868\u8bb0\u5f55\u7684\u663e\u793a\u65b9\u5f0f\u3002INNER JOIN\u8fd4\u56de\u4e24\u4e2a\u8868\u4e2d\u5b57\u6bb5\u5339\u914d\u5173\u7cfb\u7684\u8bb0\u5f55<\/strong>\uff0c\u800cLEFT JOIN\u5219\u8fd4\u56de\u5de6\u8868\u6240\u6709\u8bb0\u5f55\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u65e0\u5339\u914d\u8bb0\u5f55\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u5177\u4f53JOIN\u7c7b\u578b\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n
\u4e3a\u4e86\u89e3\u51b3\u4e0d\u540c\u7684\u6570\u636e\u67e5\u8be2\u9700\u6c42\uff0c\u4e86\u89e3\u6bcf\u79cdJOIN\u7c7b\u578b\u7684\u5177\u4f53\u5e94\u7528\u573a\u666f\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<\/p>\n
\u5e94\u7528INNER JOIN<\/h4>\n<\/p>\n
INNER JOIN<\/strong>\u5e38\u7528\u4e8e\u9700\u8981\u9009\u62e9\u4e24\u4e2a\u8868\u4e2d\u90fd\u6709\u7684\u8bb0\u5f55\u7684\u60c5\u51b5\u3002\u4f8b\u5982\uff0c\u8981\u67e5\u8be2\u6240\u6709\u4e0b\u5355\u7684\u7528\u6237\u53ca\u5176\u8ba2\u5355\u4fe1\u606f\uff0c\u53ef\u4ee5\u4f7f\u7528INNER JOIN\u6765\u5b9e\u73b0\u5bf9\u7528\u6237\u548c\u8ba2\u5355\u8868\u7684\u8fde\u63a5\u3002<\/p>\n<\/p>\n
\u5e94\u7528LEFT JOIN\u548cRIGHT JOIN<\/h4>\n<\/p>\n
\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u9700\u8981\u4fdd\u7559\u4e00\u4e2a\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u5e76\u4e14\u53ea\u83b7\u5f97\u53e6\u4e00\u4e2a\u8868\u4e2d\u5339\u914d\u7684\u8bb0\u5f55\u3002\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u5e94\u5f53\u4f7f\u7528LEFT JOIN\u6216\u8005RIGHT JOIN<\/strong>\uff0c\u5177\u4f53\u4f7f\u7528\u54ea\u4e00\u4e2a\u53d6\u51b3\u4e8e\u8981\u5b8c\u6574\u4fdd\u7559\u54ea\u4e2a\u8868\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u591a\u8868\u67e5\u8be2\u7684\u9ad8\u7ea7\u6280\u5de7<\/h3>\n<\/p>\n
\u9664\u4e86\u57fa\u672c\u7684JOIN\u7528\u6cd5\uff0cSQL\u4e5f\u63d0\u4f9b\u4e86\u9ad8\u7ea7\u529f\u80fd\u6765\u5904\u7406\u66f4\u590d\u6742\u7684\u591a\u8868\u67e5\u8be2\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u522b\u540d\u7b80\u5316\u67e5\u8be2<\/h4>\n<\/p>\n
\u5728\u8fdb\u884c\u591a\u8868\u67e5\u8be2\u65f6\uff0c\u82e5\u8868\u540d\u8f83\u957f\u6216\u8005\u591a\u6b21\u5f15\u7528\u540c\u4e00\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\u522b\u540d\uff08Alias\uff09\u6765\u7b80\u5316SQL\u8bed\u53e5\u3002\u522b\u540d\u901a\u8fc7AS\u5173\u952e\u5b57\u8d4b\u4e88\uff0c\u4f8b\u5982orders AS o<\/code>\uff0c\u8fd9\u80fd\u4f7f\u67e5\u8be2\u8bed\u53e5\u66f4\u52a0\u6e05\u6670\u7b80\u6d01\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u5b50\u67e5\u8be2\u4f18\u5316\u903b\u8f91<\/h4>\n<\/p>\n
\u5b50\u67e5\u8be2\u53ef\u4ee5\u5728\u4e3b\u67e5\u8be2\u4e2d\u5d4c\u5165\uff0c\u4f7f\u5f97\u53ef\u4ee5\u6839\u636e\u5185\u90e8\u67e5\u8be2\u7684\u7ed3\u679c\u8fdb\u884c\u5916\u90e8\u67e5\u8be2\u3002\u5728\u591a\u8868\u67e5\u8be2\u4e2d\uff0c\u5b50\u67e5\u8be2\u5e38\u5e38\u88ab\u7528\u4e8e\u4e34\u65f6\u8868\u6570\u91cf\u7684\u7b5b\u9009\u6216\u8005\u6570\u636e\u7684\u9884\u5904\u7406\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5b9e\u6218\u5e94\u7528\u548c\u4f18\u5316\u5efa\u8bae<\/h3>\n<\/p>\n
\u5728\u5b9e\u8df5\u4e2d\uff0c\u591a\u8868\u67e5\u8be2\u4e0d\u4ec5\u8981\u6c42\u7f16\u5199\u6b63\u786e\u7684\u8bed\u53e5\uff0c\u8fd8\u9700\u8981\u6ce8\u610f\u4f18\u5316\u67e5\u8be2\u6548\u7387\u3002<\/p>\n<\/p>\n
\u7d22\u5f15\u4f18\u5316<\/h4>\n<\/p>\n
\u67e5\u8be2\u6027\u80fd\u5bc6\u5207\u76f8\u5173\u4e8e\u6570\u636e\u5e93\u7d22\u5f15\u3002\u5728\u8fdb\u884cJOIN\u64cd\u4f5c\u524d\uff0c\u786e\u4fdd\u6d89\u53ca\u5230\u7684\u5217\u4e0a\u6709\u9002\u5f53\u7684\u7d22\u5f15\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u5347\u67e5\u8be2\u901f\u5ea6\u3002<\/p>\n<\/p>\n
\u5206\u6790\u67e5\u8be2\u8ba1\u5212<\/h4>\n<\/p>\n
\u5728\u6267\u884c\u590d\u6742\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u4e4b\u524d\uff0c\u4f7f\u7528EXPLAI<\/a>N\u5173\u952e\u5b57\u53ef\u4ee5\u5e2e\u52a9\u7406\u89e3MySQL\u662f\u5982\u4f55\u6267\u884c\u67e5\u8be2\u7684\u3002\u8fd9\u4e2a\u547d\u4ee4\u53ef\u4ee5\u663e\u793a\u67e5\u8be2\u7684\u6267\u884c\u8ba1\u5212\uff0c\u5305\u62ec\u8bb0\u5f55\u8bfb\u53d6\u987a\u5e8f\u3001\u8fde\u63a5\u7c7b\u578b\u7b49\u4fe1\u606f\u3002<\/p>\n<\/p>\n
\u7efc\u4e0a\u6240\u8ff0\uff0c\u6b63\u786e\u7f16\u5199MySQL\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\u9700\u8981\u660e\u6670\u5404\u79cdJOIN\u7c7b\u578b\u7684\u7528\u6cd5\u548c\u9002\u7528\u573a\u666f\uff0c\u5e76\u901a\u8fc7\u4e00\u4e9b\u9ad8\u7ea7\u6280\u5de7\u548c\u4f18\u5316\u624b\u6bb5\u6765\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002\u638c\u63e1\u591a\u8868\u67e5\u8be2\u4e0d\u4ec5\u80fd\u591f\u5e2e\u52a9\u5f00\u53d1\u8005\u6709\u6548\u5730\u5904\u7406\u6570\u636e\uff0c\u8fd8\u80fd\u4fdd\u8bc1\u6570\u636e\u5e93\u7684\u9ad8\u6027\u80fd\u8fd0\u884c\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u6211\u600e\u6837\u624d\u80fd\u5728MySQL\u4e2d\u7f16\u5199\u4e00\u4e2a\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\uff1f<\/strong><\/p>\n
\u7f16\u5199\u4e00\u4e2a\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\u5728MySQL\u4e2d\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528JOIN\u5173\u952e\u5b57\u5b9e\u73b0\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4e0d\u540c\u7684JOIN\u7c7b\u578b\uff08\u5982INNER JOIN, LEFT JOIN, RIGHT JOIN\u7b49\uff09\u6765\u5b9a\u4e49\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u5173\u7cfb\u548c\u67e5\u8be2\u7ed3\u679c\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f8b\u5b50\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u57fa\u672c\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n
SELECT \u5217\u540d\nFROM \u88681\nJOIN \u88682 ON \u88681.\u5217\u540d = \u88682.\u5217\u540d\n<\/code><\/pre>\n
\u60a8\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u60c5\u51b5\u6765\u5b9a\u5236\u8fd9\u4e2a\u67e5\u8be2\u8bed\u53e5\uff0c\u5305\u62ec\u9009\u62e9\u8981\u67e5\u8be2\u7684\u5217\u3001\u6307\u5b9a\u8fde\u63a5\u6761\u4ef6\uff08\u4f7f\u7528ON\u5173\u952e\u5b57\uff09\u4ee5\u53ca\u6dfb\u52a0\u5176\u4ed6\u8fc7\u6ee4\u6761\u4ef6\uff08\u4f7f\u7528WHERE\u5173\u952e\u5b57\uff09\u3002<\/p>\n
2. \u5728MySQL\u4e2d\uff0c\u5982\u4f55\u8054\u5408\u67e5\u8be2\u591a\u4e2a\u8868\u5e76\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\uff1f<\/strong><\/p>\n
\u5982\u679c\u60a8\u9700\u8981\u83b7\u53d6\u591a\u4e2a\u8868\u4e2d\u7684\u7279\u5b9a\u6570\u636e\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u8868\u8054\u5408\u67e5\u8be2\u6765\u5b9e\u73b0\u3002\u5728\u7f16\u5199\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528JOIN\u5173\u952e\u5b57\u8fde\u63a5\u76f8\u5e94\u7684\u8868\uff0c\u5e76\u4f7f\u7528SELECT\u8bed\u53e5\u9009\u62e9\u6240\u9700\u7684\u5217\u3002<\/p>\n
\u793a\u4f8b\u67e5\u8be2\u8bed\u53e5\u5982\u4e0b\uff1a<\/p>\n
SELECT \u88681.\u52171, \u88682.\u52172\nFROM \u88681\nJOIN \u88682 ON \u88681.\u5217\u540d = \u88682.\u5217\u540d\n<\/code><\/pre>\n
\u60a8\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u6240\u9700\u7684\u5217\uff0c\u4ee5\u53ca\u6839\u636e\u5177\u4f53\u7684\u8fde\u63a5\u6761\u4ef6\u4ee5\u53ca\u5176\u4ed6\u8fc7\u6ee4\u6761\u4ef6\u6765\u5b9a\u5236\u67e5\u8be2\u8bed\u53e5\u3002\u901a\u8fc7\u6b64\u65b9\u6cd5\uff0c\u53ef\u4ee5\u4ece\u591a\u4e2a\u8868\u4e2d\u83b7\u53d6\u6240\u9700\u7684\u6570\u636e\u3002<\/p>\n
3. \u5982\u4f55\u5728MySQL\u4e2d\u5199\u4e00\u4e2a\u590d\u6742\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\uff1f<\/strong><\/p>\n
\u6709\u65f6\u5019\uff0c\u60a8\u53ef\u80fd\u9700\u8981\u7f16\u5199\u66f4\u590d\u6742\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\u4ee5\u6ee1\u8db3\u7279\u5b9a\u7684\u67e5\u8be2\u9700\u6c42\u3002\u60a8\u53ef\u4ee5\u5bf9\u591a\u4e2aJOIN\u5173\u952e\u5b57\u8fdb\u884c\u5d4c\u5957\u6216\u4f7f\u7528\u591a\u4e2aJOIN\u5b50\u53e5\u6765\u5b9e\u73b0\u590d\u6742\u7684\u67e5\u8be2\u3002<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u7f16\u5199\u4e00\u4e2a\u590d\u6742\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n
SELECT \u88681.\u52171, \u88682.\u52172, \u88683.\u52173\nFROM \u88681\nJOIN \u88682 ON \u88681.\u5217\u540d = \u88682.\u5217\u540d\nJOIN \u88683 ON \u88682.\u5217\u540d = \u88683.\u5217\u540d\nWHERE \u6761\u4ef6\n<\/code><\/pre>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e24\u4e2aJOIN\u5b50\u53e5\u6765\u8fde\u63a5\u4e09\u4e2a\u8868\uff0c\u5e76\u4f7f\u7528WHERE\u5b50\u53e5\u6dfb\u52a0\u4e86\u989d\u5916\u7684\u8fc7\u6ee4\u6761\u4ef6\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u9700\u6c42\u8fdb\u884c\u4fee\u6539\u548c\u6269\u5c55\uff0c\u4ee5\u7f16\u5199\u9002\u5408\u60a8\u7684\u590d\u6742\u591a\u8868\u8054\u5408\u67e5\u8be2\u8bed\u53e5\u3002\u8bb0\u5f97\u4f7f\u7528\u9002\u5f53\u7684JOIN\u7c7b\u578b\u548c\u5408\u9002\u7684\u8fde\u63a5\u6761\u4ef6\u6765\u5b9a\u4e49\u8868\u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"MySQL\u4e2d\u7684\u591a\u8868\u8054\u5408\u67e5\u8be2\u901a\u5e38\u662f\u901a\u8fc7JOIN\u5b50\u53e5\u6765\u5b9e\u73b0\u7684\uff0c\u5305\u62ecINNER JOIN\uff08\u5185\u8fde\u63a5\uff09\u3001LEFT JOI […]","protected":false},"author":3,"featured_media":311218,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/311204"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=311204"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/311204\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/311218"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=311204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=311204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=311204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}