{"id":15011,"date":"2024-12-04T13:55:44","date_gmt":"2024-12-04T05:55:44","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=15011"},"modified":"2024-12-04T13:56:30","modified_gmt":"2024-12-04T05:56:30","slug":"%e7%aa%97%e5%8f%a3%e5%87%bd%e6%95%b0%e6%af%8f%e6%ac%a1%e8%bf%94%e5%9b%9e%e5%80%bc%e4%b8%8d%e5%9b%ba%e5%ae%9a%e9%97%ae%e9%a2%98%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=15011","title":{"rendered":"\u7a97\u53e3\u51fd\u6570\u6bcf\u6b21\u8fd4\u56de\u503c\u4e0d\u56fa\u5b9a\u95ee\u9898\u8bf4\u660e"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p>\u9047\u5230\u6709\u5ba2\u6237\u53cd\u9988\uff0c\u67d0\u4e2a\u5305\u542b\u7a97\u53e3\u51fd\u6570\u7684sql\u8bed\u53e5\uff0c\u591a\u6b21\u6267\u884c\u7684\u7ed3\u679c\u4e0d\u56fa\u5b9a\uff0c\u672c\u6587\u7ed9\u51fa\u89e3\u91ca\u8bf4\u660e\u3002<\/p>\n<p>\u539f\u56e0\u662f\uff0c\u5206\u7ec4\u5b57\u6bb5 \u548c \u6392\u5e8f\u5b57\u6bb5 \u5982\u679c\u6709\u91cd\u590d\u6570\u636e\u7684\u8bdd\uff0c\u65e0\u6cd5\u786e\u4fdd<code>rn=1<\/code>\u7684\u503c\u662f\u56fa\u5b9a\u7684\u3002<\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<pre><code class=\"language-sql\">--\u521b\u5efa\u4e00\u5f203\u5206\u6876\u7684orc\u4e8b\u52a1\u8868\nDROP TABLE IF EXISTS EMP;\nCREATE TABLE EMP(\n       EMPNO int,\n       ENAME string,\n       JOB string,\n       MGR INT,\n       HIREDATE DATE,\n       SAL INT,\n       COMM INT,\n       DEPTNO INT\n)CLUSTERED BY (empno) INTO 3 BUCKETS \nSTORED AS ORC_TRANSACTION;\n\n--\u63d2\u51654\u6761\u6570\u636e\nINSERT INTO EMP VALUES (7499,'ALLEN','SALESMAN',7698,tdh_todate('20-2-1981','dd-mm-yyyy'),1600,300,30);\nINSERT INTO EMP VALUES (7521,'WARD','SALESMAN',7698,tdh_todate('22-2-1981','dd-mm-yyyy'),1250,500,30);\nINSERT INTO EMP VALUES (7654,'MARTIN','SALESMAN',7698,tdh_todate('28-9-1981','dd-mm-yyyy'),1250,1400,30);\nINSERT INTO EMP VALUES (7844,'TURNER','SALESMAN',7698,tdh_todate('8-9-1981','dd-mm-yyyy'),1500,0,30);\n<\/code><\/pre>\n<p>\u6267\u884c\u5982\u4e0bsql\u8bed\u53e5\uff0c\u53ef\u4ee5\u770b\u5230\u6bcf\u6b21\u6267\u884c\u7684\u7ed3\u679c\u5e76\u4e0d\u662f\u7a33\u5b9a\u7684\uff0cename\u6709\u65f6\u662fWARD\u6709\u65f6\u662fMARTIN\u3002<\/p>\n<pre><code class=\"language-sql\">select * from\n(\n    select\n    ename,job, sal,\n    row_number() over (partition by job order by sal ASC ) as rn from EMP\n    WHERE job ='SALESMAN'\n)\nwhere rn =1;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/nj.transwarp.cn:8180\/wp-content\/uploads\/2024\/12\/image-1733291462122.png\" alt=\"file\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/nj.transwarp.cn:8180\/wp-content\/uploads\/2024\/12\/image-1733291494622.png\" alt=\"file\" \/><\/p>\n<p>\u539f\u56e0\u5c31\u662f \u7b26\u5408\u5f00\u7a97\u51fd\u6570 <code>partition by job order by sal<\/code> \u7684\u5206\u7ec4\u548c\u6392\u5e8f\u4e2d\u67092\u6761\u6570\u636e\uff0c\u6240\u4ee5\u5728\u5916\u5c42 <code>where rn=1<\/code> \u65f6 \u5c31\u65e0\u6cd5\u552f\u4e00\u786e\u5b9a\u8fd4\u56de\u54ea\u6761\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/nj.transwarp.cn:8180\/wp-content\/uploads\/2024\/12\/image-1733291372892.png\" alt=\"file\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 \u9047\u5230\u6709\u5ba2\u6237\u53cd\u9988\uff0c\u67d0\u4e2a\u5305\u542b\u7a97\u53e3\u51fd\u6570\u7684sql\u8bed\u53e5\uff0c\u591a\u6b21\u6267\u884c\u7684\u7ed3\u679c\u4e0d\u56fa\u5b9a\uff0c\u672c\u6587\u7ed9\u51fa\u89e3\u91ca\u8bf4\u660e\u3002 \u539f\u56e0\u662f\uff0c\u5206\u7ec4 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=15011\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-15011","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/15011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15011"}],"version-history":[{"count":3,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/15011\/revisions"}],"predecessor-version":[{"id":15060,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/15011\/revisions\/15060"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}