{"id":33387,"date":"2023-06-06T21:17:57","date_gmt":"2023-06-06T13:17:57","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=33387"},"modified":"2023-07-31T02:05:08","modified_gmt":"2023-07-30T18:05:08","slug":"%e5%a6%82%e6%9e%9c%e6%9c%89%e5%ad%90%e6%9f%a5%e8%af%a2sql%e8%af%ad%e5%8f%a5%e7%9a%84%e6%89%a7%e8%a1%8c%e9%a1%ba%e5%ba%8f%e6%98%af%e6%80%8e%e4%b9%88%e6%a0%b7%e7%9a%84","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/33387.html","title":{"rendered":"\u5982\u679c\u6709\u5b50\u67e5\u8be2SQL\u8bed\u53e5\u7684\u6267\u884c\u987a\u5e8f\u662f\u600e\u4e48\u6837\u7684"},"content":{"rendered":"
\n

\u5982\u679c\u6709\u5b50\u67e5\u8be2SQL\u8bed\u53e5\u7684\u6267\u884c\u987a\u5e8f\u5206\u4e09\u79cd\u60c5\u51b5\uff1a1\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aWHERE\u5b50\u53e5\u7684\u4e00\u90e8\u5206\uff1b2\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aHAVING\u5b50\u53e5\u7684\u4e00\u90e8\u5206\uff1b3\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aSELECT\u5b50\u53e5\u7684\u4e00\u90e8\u5206\u3002\u5b50\u67e5\u8be2\u4f5c\u4e3aWHERE\u5b50\u53e5\u7684\u4e00\u90e8\u5206\u65f6\uff0c\u9996\u5148\u4f1a\u6267\u884c\u5b50\u67e5\u8be2\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\u3002<\/p>\n<\/blockquote>\n

\"\"<\/figure>\n

\u4e00\u3001\u5982\u679c\u6709\u5b50\u67e5\u8be2SQL\u8bed\u53e5\u7684\u6267\u884c\u987a\u5e8f\u662f\u600e\u4e48\u6837\u7684<\/h3>\n

1\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aWHERE\u5b50\u53e5\u7684\u4e00\u90e8\u5206<\/h3>\n

\u5b50\u67e5\u8be2\u4f5c\u4e3aWHERE\u5b50\u53e5\u7684\u4e00\u90e8\u5206\u65f6\uff0c\u9996\u5148\u4f1a\u6267\u884c\u5b50\u67e5\u8be2\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\u540e\uff0c\u5c06\u8be5\u7ed3\u679c\u96c6\u4f5c\u4e3a\u6761\u4ef6\u4e0e\u5916\u5c42\u67e5\u8be2\u7684\u8868\u8fdb\u884c\u6bd4\u8f83\uff0c\u53ea\u6709\u7b26\u5408\u6761\u4ef6\u7684\u884c\u624d\u4f1a\u88ab\u8fd4\u56de\u3002<\/p>\n

\u4f8b\u5982\uff1a<\/p>\n

SELECT * FROM table_name WHERE column_name IN (SELECT column_name FROM another_table_name WHERE condition);<\/pre>\n
\u6b64\u5904\uff0c\u5b50\u67e5\u8be2\u4f1a\u9996\u5148\u6267\u884c\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\uff0c\u5e76\u8fd4\u56de\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u5217\u503c\uff0c\u7136\u540e\u5c06\u8fd9\u4e9b\u5217\u503c\u4e0e\u5916\u5c42WHERE\u6761\u4ef6\u4e2d\u6307\u5b9a\u7684\u5217\u503c\u8fdb\u884c\u6bd4\u8f83\uff0c\u53ea\u8fd4\u56de\u90a3\u4e9b\u6ee1\u8db3\u6761\u4ef6\u7684\u884c\u3002<\/p>\n
2\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aHAVING\u5b50\u53e5\u7684\u4e00\u90e8\u5206<\/h3>\n
\u5b50\u67e5\u8be2\u4f5c\u4e3aHAVING\u5b50\u53e5\u7684\u4e00\u90e8\u5206\u65f6\uff0c\u9996\u5148\u4f1a\u5bf9GROUP BY\u5b50\u53e5\u6240\u6307\u5b9a\u7684\u5217\u8fdb\u884c\u5206\u7ec4\uff0c\u7136\u540e\u518d\u6267\u884c\u5b50\u67e5\u8be2\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\u540e\uff0c\u5c06\u8be5\u7ed3\u679c\u96c6\u4f5c\u4e3a\u6761\u4ef6\u4e0e\u5206\u7ec4\u540e\u7684\u6bcf\u4e2a\u7ec4\u8fdb\u884c\u6bd4\u8f83\uff0c\u53ea\u6709\u7b26\u5408\u6761\u4ef6\u7684\u7ec4\u624d\u4f1a\u88ab\u8fd4\u56de\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
SELECT column_name FROM table_name GROUP BY column_name HAVING MAX(column_name) > (SELECT column_name FROM another_table_name WHERE condition)<\/code><\/pre>\n
\u6b64\u5904\uff0c\u9996\u5148\u4f1a\u5bf9table_name\u4e2d\u7684\u5217\u8fdb\u884c\u5206\u7ec4\uff0c\u7136\u540e\u5728\u6bcf\u4e2a\u7ec4\u5185\u90e8\u6267\u884c\u5b50\u67e5\u8be2\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\uff0c\u5e76\u8fd4\u56de\u90a3\u4e9b\u6700\u5927\u503c\u5927\u4e8eanother_table_name\u4e2d\u7684\u5217\u503c\u7684\u7ec4\u3002<\/p>\n
3\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aSELECT\u5b50\u53e5\u7684\u4e00\u90e8\u5206<\/h3>\n
\u5b50\u67e5\u8be2\u4f5c\u4e3aSELECT\u5b50\u53e5\u7684\u4e00\u90e8\u5206\u65f6\uff0c\u9996\u5148\u4f1a\u6267\u884c\u5b50\u67e5\u8be2\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\u540e\uff0c\u5c06\u8be5\u7ed3\u679c\u96c6\u4f5c\u4e3a\u5217\u503c\u52a0\u5165\u5230\u5916\u5c42\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\u4e2d\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
SELECT column_name1, (SELECT column_name2 FROM another_table_name WHERE condition) AS column_name3 FROM table_name;<\/code><\/pre>\n
\u6b64\u5904\uff0c\u5b50\u67e5\u8be2\u4f1a\u9996\u5148\u6267\u884c\uff0c\u5f97\u5230\u7ed3\u679c\u96c6\uff0c\u5e76\u5c06\u5176\u4f5c\u4e3a\u4e00\u5217(column_name3)\u52a0\u5165\u5230\u5f53\u524d\u67e5\u8be2\u7ed3\u679c\u96c6\u4e2d\u3002<\/p>\n
\u4e8c\u3001SQL\u5355\u8868\u67e5\u8be2<\/h3>\n
1\u3001\u7b80\u4ecb<\/h3>\n
\u67e5\u8be2\u8bed\u53e5\uff08SELECT\uff09\u662f\u6570\u636e\u5e93\u4e2d\u6700\u57fa\u672c\u7684\u548c\u6700\u91cd\u8981\u7684\u8bed\u53e5\u4e4b\u4e00\uff0c\u5176\u529f\u80fd\u662f\u4ece\u6570\u636e\u5e93\u4e2d\u68c0\u7d22\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\u3002\u67e5\u8be2\u7684\u6570\u636e\u6e90\u53ef\u4ee5\u6765\u81ea\u4e00\u5f20\u8868\uff0c\u4e5f\u53ef\u4ee5\u6765\u81ea\u591a\u5f20\u8868\u751a\u81f3\u6765\u81ea\u89c6\u56fe\uff0c\u67e5\u8be2\u7684\u7ed3\u679c\u662f\u75310\u884c\uff08\u6ca1\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u6570\u636e\uff09\u6216\u591a\u884c\u8bb0\u5f55\u7ec4\u6210\u7684\u4e00\u4e2a\u8bb0\u5f55\u96c6\u5408\uff0c\u5e76\u5141\u8bb8\u9009\u62e9\u4e00\u4e2a\u6216\u591a\u4e2a\u5b57\u6bb5\u4f5c\u4e3a\u8f93\u51fa\u5b57\u6bb5\u3002SELECT\u8bed\u53e5\u8fd8\u53ef\u4ee5\u5bf9\u67e5\u8be2\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f\u3001\u6c47\u603b\u7b49\u3002\u67e5\u8be2\u8bed\u53e5\u7684\u57fa\u672c\u7ed3\u6784\u53ef\u63cf\u8ff0\u4e3a\uff1a<\/p>\n
SELECT <\u76ee\u6807\u5217\u540d\u5e8f\u5217> -- \u9700\u8981\u54ea\u4e9b\u5217FROM <\u8868\u540d> [JOIN <\u8868\u540d> ON <\u8fde\u63a5\u6761\u4ef6>] -- \u6765\u81ea\u54ea\u4e9b\u8868[WHERE <\u884c\u9009\u62e9\u6761\u4ef6>] -- \u6839\u636e\u4ec0\u4e48\u6761\u4ef6[GROUP BY <\u5206\u7ec4\u4f9d\u636e\u5217>][HAVING <\u7ec4\u9009\u62e9\u6761\u4ef6>][ORDER BY <\u6392\u5217\u4f9d\u636e\u5217>]<\/code><\/pre>\n
\u5176\u4e2d\uff1a<\/p>\n
    \n
  • SELECT \u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u8f93\u51fa\u7684\u5b57\u6bb5<\/li>\n
  • FROM \u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u6570\u636e\u7684\u6765\u6e90<\/li>\n
  • WHERE \u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u6570\u636e\u7684\u884c\u9009\u62e9\u6761\u4ef6<\/li>\n
  • GROUP BY \u5b50\u53e5\u7528\u4e8e\u5bf9\u68c0\u7d22\u5230\u7684\u8bb0\u5f55\u8fdb\u884c\u5206\u7ec4<\/li>\n
  • HAVING \u5b50\u53e5\u7528\u4e8e\u6307\u5b9a\u5bf9\u5206\u7ec4\u540e\u7ed3\u679c\u7684\u9009\u62e9\u6761\u4ef6<\/li>\n
  • ORDER BY \u5b50\u53e5\u7528\u4e8e\u5bf9\u67e5\u8be2\u7684\u7ed3\u679c\u8fdb\u884c\u6392\u5e8f<\/li>\n<\/ul>\n
    2\u3001\u9009\u62e9\u8868\u4e2d\u82e5\u5e72\u5217<\/h3>\n
    \u67e5\u8be2\u6307\u5b9a\u7684\u5217\uff1a<\/p>\n
    -- \u67e5\u8be2\u5168\u4f53\u5b66\u751f\u7684\u5b66\u597d\u4e0e\u59d3\u540dSELECT Sno, Sname FROM Student<\/code><\/pre>\n
    \u67e5\u8be2\u5168\u90e8\u5217\uff1a<\/p>\n
    -- \u67e5\u8be2\u5168\u4f53\u5b66\u751f\u7684\u5168\u90e8\u4fe1\u606fSELECT Sno, Sname, Ssex, Sbirthday, Sdept, Memo FROM Student-- \u7b49\u4ef7\u4e8eSELECT * FROM Student<\/code><\/pre>\n
    \u67e5\u8be2\u8868\u4e2d\u6ca1\u6709\u7684\u5217\uff1a<\/p>\n
    -- \u542b\u8868\u8fbe\u5f0f\u7684\u5217\uff1a\u67e5\u8be2\u5168\u4f53\u5b66\u751f\u7684\u59d3\u540d\u53ca\u5e74\u9f84\uff08\u5e74\u9f84\u7684\u5217\u540d\u662f\u7a7a\uff09\nSELECT Sname, YEAR(GETDATE()) - YEAR(Sbirthday) FROM Student\n\n-- \u67e5\u8be2\u5168\u4f53\u5b66\u751f\u7684\u59d3\u540d\u3001\u5e74\u9f84\u3001\u5b57\u7b26\u4e32\u201c\u4eca\u5e74\u662f\u201d\u4ee5\u53ca\u4eca\u5e74\u7684\u5e74\u4efd\uff08\u7ed9\u5217\u53d6\u522b\u540d\uff09\nSELECT Sname \u59d3\u540d,\nYEAR(GETDATE()) - YEAR(Sbirthday) \u5e74\u9f84,\n'\u4eca\u5e74\u662f' \u4eca\u5e74\u662f, YEAR(GETDATE()) \u5e74\u4efd\nFROM Student<\/code><\/pre>\n
    3\u3001\u9009\u62e9\u8868\u4e2d\u82e5\u5e72\u884c<\/h3>\n
    \u67e5\u8be2\u6ee1\u8db3\u6761\u4ef6\u7684\u5143\u7ec4\uff1a<\/p>\n
    -- 1. \u6bd4\u8f83\u5927\u5c0f--------------------------------------------\n-- \u67e5\u8be2\u8ba1\u7b97\u673a\u7cfb\u6240\u6709\u5b66\u751f\u7684\u59d3\u540d\nSELECT Sname FROM Student WHERE Sdept='\u8ba1\u7b97\u673a\u7cfb'\n\n-- \u67e5\u8be2\u8003\u8bd5\u6210\u7ee9\u5927\u4e8e90\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u8bfe\u7a0b\u53f7\u548c\u6210\u7ee9\nSELECT Sno, Cno, Grade FROM SC WHERE Grade > 90\n\n-- 2. \u786e\u5b9a\u8303\u56f4--------------------------------------------\n\/*\n\u6ce8\u610f\uff1a\nBETWEEN ... AND ... \uff1a\u5305\u62ec\u8fb9\u754c\nNOT BETWEEN ... AND ... \uff1a\u4e0d\u5305\u62ec\u8fb9\u754c\n*\/\n-- \u67e5\u8be2\u5b66\u5206\u57282\uff5e3\u4e4b\u95f4\u7684\u8bfe\u7a0b\u7684\u8bfe\u7a0b\u540d\u79f0\u3001\u5b66\u5206\u548c\u5f00\u8bfe\u5b66\u671f\nSELECT Cname, Credit, Semester FROM Course WHERE Credit BETWEEN 2 AND 3\n-- \u7b49\u4ef7\u4e8e\nSELECT Cname, Credit, Semester FROM Course \nWHERE Credit >= 2 AND Credit <=3\n\n-- \u67e5\u8be2\u5b66\u5206\u4e0d\u57282\uff5e3\u4e4b\u95f4\u7684\u8bfe\u7a0b\u7684\u8bfe\u7a0b\u540d\u79f0\u3001\u5b66\u5206\u548c\u5f00\u8bfe\u5b66\u671f\nSELECT Cname, Credit, Semester FROM Course \nWHERE Credit NOT BETWEEN 2 AND 3\n-- \u7b49\u4ef7\u4e8e\nSELECT Cname, Credit, Semester FROM Course\nWHERE Credit < 2 OR Credit > 3\n\n-- \u67e5\u8be2\u51fa\u751f\u57281997\u5e74\u7684\u5b66\u751f\u7684\u5168\u90e8\u4fe1\u606f\nSELECT * FROM Student\nWHERE Sbirthday BETWEEN '1997-01-01' AND '1997-12-31'\n\n-- 3. \u786e\u5b9a\u96c6\u5408--------------------------------------------\n-- \u67e5\u8be2\u2018\u8ba1\u7b97\u673a\u7cfb\u2019\u548c\u2018\u673a\u7535\u7cfb\u2019\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student\nWHERE Sdept IN ('\u8ba1\u7b97\u673a\u7cfb', '\u673a\u7535\u7cfb')\n\n-- \u67e5\u8be2\u4e0d\u5728\u2018\u8ba1\u7b97\u673a\u7cfb\u2019\u548c\u2018\u673a\u7535\u7cfb\u2019\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student\nWHERE Sdept NOT IN ('\u8ba1\u7b97\u673a\u7cfb', '\u673a\u7535\u7cfb')\n\n-- 4. \u5b57\u7b26\u4e32\u5339\u914d--------------------------------------------\n\/*\n\u5339\u914d\u4e32\u4e2d\u6709\u5982\u4e0b\u56db\u79cd\u901a\u914d\u7b26\uff1a\n_\uff1a\u5339\u914d\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\n%\uff1a\u5339\u914d0\u5230\u591a\u4e2a\u5b57\u7b26\n[]\uff1a\u5339\u914d[ ]\u4e2d\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\u3002\u5982[abcd]\u8868\u793a\u5339\u914da, b, c, d\u4e2d\u7684\u4e00\u4e2a\u3002\n\t\u82e5\u8981\u6bd4\u8f83\u7684\u5b57\u7b26\u662f\u8fde\u7eed\u7684\uff0c\u4e5f\u53ef\u4ee5\u7528\u8fde\u5b57\u7b26'-'\u8868\u8fbe\uff0c\u6bd4\u5982\u5339\u914d abcd\u4e2d\u4efb\u610f\u4e00\u4e2a\n\t\u53ef\u5199\u6210 [a-d]\n[^ ]\uff1a\u4e0d\u5339\u914d[ ]\u4e2d\u7684\u4efb\u610f\u4e00\u4e2a\u5b57\u7b26\uff0c\u7528\u6cd5\u4e0e[ ]\u4e00\u81f4\uff0c\u4e5f\u53ef\u4ee5\u7528'-'\u8868\u793a\u8fde\u7eed\u5b57\u7b26\n*\/\n-- \u67e5\u8be2\u59d3\u2018\u674e\u2019\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student\nWHERE Sname LIKE '\u674e%'\n\n-- \u67e5\u8be2\u59d3\u540d\u4e2d\u7b2c\u4e8c\u4e2a\u5b57\u662f\u2018\u51b2\u2019\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student\nWHERE Sname LIKE '_\u51b2%'\n\n-- \u67e5\u8be2\u5b66\u53f7\u6700\u540e\u4e0d\u662f\u20182\u2019\u6216\u8005\u20183\u2019\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student\nWHERE Sno NOT LIKE '%[23]'\n\/*\n\u6ce8\uff1amysql\u7684LIKE\u597d\u50cf\u6ca1\u6709 []\u548c [^]\u7684\u7528\u6cd5\uff0c\u4f46\u53ef\u4ee5\u7528 REGEXP\u548c NOT REGEXP\n\t\u6765\u7528\u6b63\u5219\u8868\u8fbe\u5f0f\u8fdb\u884c\u5339\u914d\n*\/\n-- \u5982mysql\u4e0b\uff0c\u67e5\u8be2\u5b66\u53f7\u6700\u540e\u4e0d\u662f\u20182\u2019\u6216\u8005\u20183\u2019\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u6240\u5728\u7cfb\nSELECT Sno, Sname, Sdept FROM Student \nWHERE Sno NOT REGEXP '[23]$'\n\n\/*\nESCAPE\uff1a\u53ef\u4ee5\u6307\u5b9a\u4e00\u4e2a\u5b57\u7b26\uff0c\u5c06\u8be5\u5b57\u7b26\u540e\u9762\u7684\u4e00\u4e2a\u5b57\u7b26\u5f53\u4f5c\u666e\u901a\u5b57\u7b26\u770b\u5f85\uff0c\n\t\u53ef\u4ee5\u7528\u6765\u5339\u914d '_' \u548c '%' \u7b49\u901a\u914d\u7b26\n*\/\n-- \u67e5\u8be2msg\u5b57\u6bb5\u4e2d\u5305\u542b \"30%\" \u7684\u8bb0\u5f55\nWHERE msg LIKE '%30!%%' ESCAPE '!'\n\n-- 5. \u6d89\u53ca\u7a7a\u503c\u7684\u67e5\u8be2--------------------------------------------\n-- \u67e5\u8be2\u8fd8\u6ca1\u6709\u8003\u8bd5\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u76f8\u5e94\u7684\u8bfe\u7a0b\u53f7\nSELECT Sno, Cno FROM SC\nWHERE Grade IS NULL\n\n-- \u67e5\u8be2\u6709\u5907\u6ce8\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u548c\u5907\u6ce8\nSELECT Sno, Sname, Memo FROM Student\nWHERE Memo IS NOT NULL\n\n-- 6. \u591a\u91cd\u6761\u4ef6\u67e5\u8be2--------------------------------------------\n-- \u67e5\u8be2\u2018\u8ba1\u7b97\u673a\u7cfb\u2019\u6709\u5907\u6ce8\u7684\u5b66\u751f\u7684\u5b66\u597d\u3001\u59d3\u540d\u3001\u6240\u5728\u7cfb\u548c\u5907\u6ce8\nSELECT Sno, Sname, Sdept, Memo FROM Student\nWHERE Memo IS NOT NULL AND Sdelt = '\u8ba1\u7b97\u673a\u7cfb'\n\n-- \u67e5\u8be2 \u2018\u673a\u7535\u7cfb\u2019\u548c\u2018\u8ba1\u7b97\u673a\u7cfb\u20191997\u5e74\u51fa\u751f\u7684\u5b66\u751f\u7684\u5b66\u53f7\u3001\u59d3\u540d\u3001\u6240\u5728\u7cfb\u548c\u751f\u65e5\nSELECT Sno, Sname, Sdept, Sbirthday FROM Student\nWHERE (Sdept = '\u8ba1\u7b97\u673a\u7cfb' OR Sdept = '\u673a\u7535\u7cfb')\nAND Sbirthday BETWEEN '1997-01-01' AND '1997-12-31'\n<\/code><\/pre>\n
    \u6d88\u9664\u53d6\u503c\u76f8\u540c\u7684\u884c\uff1a<\/p>\n
    \/*\n\u867d\u7136\u539f\u5173\u7cfb\u4e2d\u4e0d\u5b58\u5728\u4e24\u4e2a\u5b8c\u5168\u76f8\u540c\u7684\u5143\u7ec4\uff0c\n\u4f46\u7ecf\u8fc7\u4e00\u5b9a\u64cd\u4f5c\u540e\u53ef\u80fd\u4f1a\u51fa\u73b0\u76f8\u540c\u7684\u5143\u7ec4\n*\/\n-- \u67e5\u8be2\u6709\u8003\u8bd5\u6302\u79d1\u7684\u5b66\u751f\u7684\u5b66\u53f7\nSELECT DISTINCT Sno FROM SC\nWHERE Grade < 60\n<\/code><\/pre>\n
    \u5ef6\u4f38\u9605\u8bfb1\uff1aSQL\u8bed\u6cd5\u8981\u6c42<\/em><\/strong><\/p>\n
      \n
    • SQL\u8bed\u53e5\u53ef\u4ee5\u5355\u884c\u6216\u591a\u884c\u4e66\u5199\uff0c\u4ee5\u5206\u53f7\u7ed3\u5c3e\uff1b<\/li>\n
    • \u53ef\u4ee5\u7528\u7a7a\u683c\u548c\u7f29\u8fdb\u6765\u6765\u589e\u5f3a\u8bed\u53e5\u7684\u53ef\u8bfb\u6027\uff1b<\/li>\n
    • \u5173\u952e\u5b57\u4e0d\u533a\u522b\u5927\u5c0f\u5199\uff0c\u5efa\u8bae\u4f7f\u7528\u5927\u5199\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"\u5982\u679c\u6709\u5b50\u67e5\u8be2SQL\u8bed\u53e5\u7684\u6267\u884c\u987a\u5e8f\u5206\u4e09\u79cd\u60c5\u51b5\uff1a1\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aWHERE\u5b50\u53e5\u7684\u4e00\u90e8\u5206\uff1b2\u3001\u5b50\u67e5\u8be2\u4f5c\u4e3aHAVING\u5b50 […]","protected":false},"author":1,"featured_media":33388,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[119],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/33387"}],"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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=33387"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/33387\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/33388"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=33387"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=33387"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=33387"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}