{"id":315057,"date":"2024-01-22T12:38:35","date_gmt":"2024-01-22T04:38:35","guid":{"rendered":"https:\/\/www.idc.net\/help\/315057\/"},"modified":"2024-01-22T12:38:35","modified_gmt":"2024-01-22T04:38:35","slug":"oracle-%e8%af%ad%e5%8f%a5%e7%9a%84%e4%bc%98%e5%8c%96%e8%a7%84%e5%88%99%e4%b8%ad%e7%9a%84%e7%9b%b8%e5%85%b3%e9%a1%b9%e7%9b%ae","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/315057\/","title":{"rendered":"Oracle \u8bed\u53e5\u7684\u4f18\u5316\u89c4\u5219\u4e2d\u7684\u76f8\u5173\u9879\u76ee"},"content":{"rendered":"

\u4ee5\u4e0b\u7684\u6587\u7ae0\u4e3b\u8981\u662f\u8bb2\u8ff0Oracle  \u8bed\u53e5\u7684\u4f18\u5316\u89c4\u5219\u6c47\u603b\uff0c\u5176\u4e2d\u5305\u62ecWHERE\u5b50\u53e5\u4e2d\u7684\u6b63\u786e\u7684\u8fde\u63a5\u987a\u5e8f\uff0c\u4ee5\u53caSELECT\u5b50\u53e5\u4e2d\u5e94\u907f\u514d\u4f7f\u7528\u7684\u7b26\u53f7\u7684\u4ecb\u7ecd\u3002\u4ee5\u4e0b\u5c31\u662f\u6b63\u6587\u7684\u76f8\u5173\u5185\u5bb9\u7684\u4ecb\u7ecd\uff0c\u671b\u4f60\u4f1a\u6709\u6240\u6536\u83b7\u3002<\/p>\n

1. WHERE\u5b50\u53e5\u4e2d\u7684\u8fde\u63a5\u987a\u5e8f<\/strong><\/p>\n

Oracle \u91c7\u7528\u81ea\u4e0b\u800c\u4e0a\u7684\u987a\u5e8f\u89e3\u6790WHERE\u5b50\u53e5\uff0c\u6839\u636e\u8fd9\u4e2a\u539f\u7406\uff0c\u8868\u4e4b\u95f4\u7684\u8fde\u63a5\u5fc5\u987b\u5199\u5728\u5176\u4ed6WHERE\u6761\u4ef6\u4e4b\u524d\uff0c \u90a3\u4e9b\u53ef\u4ee5\u8fc7\u6ee4\u6389***\u6570\u91cf\u8bb0\u5f55\u7684\u6761\u4ef6\u5fc5\u987b\u5199\u5728WHERE\u5b50\u53e5\u7684\u672b\u5c3e\u3002<\/p>\n

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

(\u4f4e\u6548\uff0c\u6267\u884c\u65f6\u95f4156.3\u79d2)<\/p>\n

 <\/p>\n

\n \n \n 
    \n  \n  \n  
  1. SELECT \u2026   <\/span><\/span><\/li>\n  \n  \n  
  2. FROM EMP E   <\/span><\/li>\n  \n  \n  
  3. WHERE SAL <\/span>><\/span> 50000   <\/span><\/li>\n  \n  \n  
  4. AND <\/span>JOB<\/span> = \u2018MANAGER\u2019   <\/span><\/li>\n  \n  \n  
  5. AND 25 <\/span><<\/span> (SELECT COUNT(*) FROM EMP   <\/span><\/li>\n  \n  \n  
  6. WHERE <\/span>MGR<\/span>=<\/span>E<\/span>.EMPNO);  <\/span><\/li>\n \n \n <\/ol><\/pre>\n
    (\u9ad8\u6548,\u6267\u884c\u65f6\u95f410.6\u79d2)<\/p>\n
     <\/p>\n
    \n \n \n 
      \n  \n  \n  
    1. SELECT \u2026   <\/span><\/span><\/li>\n  \n  \n  
    2. FROM EMP E   <\/span><\/li>\n  \n  \n  
    3. WHERE 25 <\/span><<\/span> (SELECT COUNT(*) FROM EMP   <\/span><\/li>\n  \n  \n  
    4. WHERE <\/span>MGR<\/span>=<\/span>E<\/span>.EMPNO)   <\/span><\/li>\n  \n  \n  
    5. AND SAL <\/span>><\/span> 50000   <\/span><\/li>\n  \n  \n  
    6. AND <\/span>JOB<\/span> = \u2018MANAGER\u2019;  <\/span><\/li>\n \n \n <\/ol><\/pre>\n
      2. SELECT\u5b50\u53e5\u4e2d\u907f\u514d\u4f7f\u7528 \u2018 * \u2019<\/strong><\/p>\n
      \u5f53\u4f60\u60f3\u5728SELECT\u5b50\u53e5\u4e2d\u5217\u51fa\u6240\u6709\u7684COLUMN\u65f6\uff0c\u4f7f\u7528\u52a8\u6001SQL\u5217\u5f15\u7528 \u2018*\u2019 \u662f\u4e00\u4e2a\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002\u4e0d\u5e78\u7684\u662f\uff0c\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u4f4e\u6548\u7684\u65b9\u6cd5\u3002 \u5b9e\u9645\u4e0a\uff0cOracle \u5728\u89e3\u6790\u7684\u8fc7\u7a0b\u4e2d\uff0c \u4f1a\u5c06\u2018*\u2019 \u4f9d\u6b21\u8f6c\u6362\u6210\u6240\u6709\u7684\u5217\u540d\uff0c \u8fd9\u4e2a\u5de5\u4f5c\u662f\u901a\u8fc7\u67e5\u8be2\u6570\u636e\u5b57\u5178\u5b8c\u6210\u7684\uff0c \u8fd9\u610f\u5473\u7740\u5c06\u8017\u8d39\u66f4\u591a\u7684\u65f6\u95f4\u3002<\/p>\n
      3. \u51cf\u5c11\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u6b21\u6570<\/strong><\/p>\n
      \u5f53\u6267\u884c\u6bcf\u6761Oracle \u8bed\u53e5\u65f6\uff0c Oracle \u5728\u5185\u90e8\u6267\u884c\u4e86\u8bb8\u591a\u5de5\u4f5c\uff1a \u89e3\u6790Oracle \u8bed\u53e5\uff0c \u4f30\u7b97\u7d22\u5f15\u7684\u5229\u7528\u7387\uff0c \u7ed1\u5b9a\u53d8\u91cf \uff0c \u8bfb\u6570\u636e\u5757\u7b49\u7b49\u3002 \u7531\u6b64\u53ef\u89c1\uff0c \u51cf\u5c11\u8bbf\u95ee\u6570\u636e\u5e93\u7684\u6b21\u6570 \uff0c \u5c31\u80fd\u5b9e\u9645\u4e0a\u51cf\u5c11Oracle \u7684\u5de5\u4f5c\u91cf\u3002<\/p>\n
      \u6587\u7ae0\u51fa\u81ea:http:\/\/www.programbbs.com\/doc\/class10-2.htm<\/p>\n
      \u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n
        \n
      1. \u63a2\u8ba8\u600e\u6837\u56de\u6536Oracle\u76d1\u542c\u5668\u65e5\u5fd7\u6587\u4ef6<\/li>\n
      2. \u53d1\u6325Oracle\u6570\u636e\u5e93\u6570\u636e\u7ba1\u7406\u529f\u80fd\u7684\u65b9\u6cd5<\/li>\n
      3. Oracle 11g\u4e94\u5927\u72ec\u7279\u7279\u80fd\u7684\u63cf\u8ff0<\/li>\n
      4. \u600e\u6837\u6062\u590dOracle\u91cd\u505a\u65e5\u5fd7\u4e22\u5931\u7684\u7a8d\u95e8<\/li>\n
      5. \u5982\u4f55\u914d\u7f6eOracle\u6570\u636e\u5e93<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
        \u4ee5\u4e0b\u7684\u6587\u7ae0\u4e3b\u8981\u662f\u8bb2\u8ff0Oracle  \u8bed\u53e5\u7684\u4f18\u5316\u89c4\u5219\u6c47\u603b\uff0c\u5176\u4e2d\u5305\u62ecWHERE\u5b50\u53e5\u4e2d\u7684\u6b63\u786e\u7684\u8fde\u63a5\u987a\u5e8f\uff0c\u4ee5 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-315057","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/315057","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=315057"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/315057\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=315057"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=315057"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=315057"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}