{"id":5217,"date":"2021-02-05T16:53:02","date_gmt":"2021-02-05T08:53:02","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=5217"},"modified":"2025-03-11T09:44:27","modified_gmt":"2025-03-11T01:44:27","slug":"%e6%95%b0%e6%8d%ae%e5%80%be%e6%96%9c%e4%b9%8b%e5%b0%91%e6%95%b0joinkey%e5%80%be%e6%96%9c","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=5217","title":{"rendered":"\u6570\u636e\u503e\u659c\u4e4b\u5927\u8868\u4e0e\u5927\u8868join\uff0c\u5c11\u6570key\u503e\u659c"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p><strong><font color=red>\u6ce8\u610f\uff1aargodb\u9ad8\u7248\u672c\u652f\u6301skewjoin\uff0c\u53ef\u4ee5\u901a\u8fc7skewjoin\u89e3\u51b3\u90e8\u5206jonkey\u503e\u659c\u7684\u95ee\u9898\u3002<\/font><\/strong><\/p>\n<p><strong>\u6570\u636e\u503e\u659c\u53d1\u751f\u7684\u73b0\u8c61\uff1a<\/strong><\/p>\n<ol>\n<li>\u7edd\u5927\u591a\u6570task\u6267\u884c\u5f97\u90fd\u975e\u5e38\u5feb\uff0c\u4f46\u4e2a\u522btask\u6267\u884c\u6781\u6162\u3002\u6bd4\u5982\uff0c\u603b\u5171\u67091000\u4e2atask\uff0c997\u4e2atask\u90fd\u57281\u5206\u949f\u4e4b\u5185\u6267\u884c\u5b8c\u4e86\uff0c\u4f46\u662f\u5269\u4f59\u4e24\u4e09\u4e2atask\u5374\u8981\u4e00\u4e24\u4e2a\u5c0f\u65f6\u3002\u8fd9\u79cd\u60c5\u51b5\u5f88\u5e38\u89c1\u3002<\/li>\n<li>\u539f\u672c\u80fd\u591f\u6b63\u5e38\u6267\u884c\u7684Spark\u4f5c\u4e1a\uff0c\u67d0\u5929\u7a81\u7136\u62a5\u51faOOM\uff08\u5185\u5b58\u6ea2\u51fa\uff09\u5f02\u5e38\uff0c\u89c2\u5bdf\u5f02\u5e38\u6808\uff0c\u662f\u6211\u4eec\u5199\u7684\u4e1a\u52a1\u4ee3\u7801\u9020\u6210\u7684\u3002\u8fd9\u79cd\u60c5\u51b5\u6bd4\u8f83\u5c11\u89c1\u3002<\/li>\n<\/ol>\n<p><strong>\u6570\u636e\u503e\u659c\u53d1\u751f\u7684\u539f\u7406\uff1a<\/strong><\/p>\n<p>\u6570\u636e\u503e\u659c\u7684\u539f\u7406\u5f88\u7b80\u5355\uff1a\u5728\u8fdb\u884cshuffle\u7684\u65f6\u5019\uff0c\u5fc5\u987b\u5c06\u5404\u4e2a\u8282\u70b9\u4e0a\u76f8\u540c\u7684key\u62c9\u53d6\u5230\u67d0\u4e2a\u8282\u70b9\u4e0a\u7684\u4e00\u4e2atask\u6765\u8fdb\u884c\u5904\u7406\uff0c\u6bd4\u5982\u6309\u7167key\u8fdb\u884c\u805a\u5408\u6216join\u7b49\u64cd\u4f5c\u3002<br \/>\n\u6b64\u65f6\u5982\u679c\u67d0\u4e2akey\u5bf9\u5e94\u7684\u6570\u636e\u91cf\u7279\u522b\u5927\u7684\u8bdd\uff0c\u5c31\u4f1a\u53d1\u751f\u6570\u636e\u503e\u659c\u3002\u6bd4\u5982\u5927\u90e8\u5206key\u5bf9\u5e9410\u6761\u6570\u636e\uff0c\u4f46\u662f\u4e2a\u522bkey\u5374\u5bf9\u5e94\u4e86100\u4e07\u6761\u6570\u636e\uff0c\u90a3\u4e48\u5927\u90e8\u5206task\u53ef\u80fd\u5c31\u53ea\u4f1a\u5206\u914d\u523010\u6761\u6570\u636e\uff0c\u7136\u540e1\u79d2\u949f\u5c31\u8fd0\u884c\u5b8c\u4e86\uff1b<br \/>\n\u4f46\u662f\u4e2a\u522btask\u53ef\u80fd\u5206\u914d\u5230\u4e86100\u4e07\u6570\u636e\uff0c\u8981\u8fd0\u884c\u4e00\u4e24\u4e2a\u5c0f\u65f6\u3002\u56e0\u6b64\uff0c\u6574\u4e2aSpark\u4f5c\u4e1a\u7684\u8fd0\u884c\u8fdb\u5ea6\u662f\u7531\u8fd0\u884c\u65f6\u95f4\u6700\u957f\u7684\u90a3\u4e2atask\u51b3\u5b9a\u7684\u3002<\/p>\n<p>\u56e0\u6b64\u51fa\u73b0\u6570\u636e\u503e\u659c\u7684\u65f6\u5019\uff0cSpark\u4f5c\u4e1a\u770b\u8d77\u6765\u4f1a\u8fd0\u884c\u5f97\u975e\u5e38\u7f13\u6162\uff0c\u751a\u81f3\u53ef\u80fd\u56e0\u4e3a\u67d0\u4e2atask\u5904\u7406\u7684\u6570\u636e\u91cf\u8fc7\u5927\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\u3002<\/p>\n<p>\u4e0b\u56fe\u5c31\u662f\u4e00\u4e2a\u5f88\u6e05\u6670\u7684\u4f8b\u5b50\uff1ahello\u8fd9\u4e2akey\uff0c\u5728\u4e09\u4e2a\u8282\u70b9\u4e0a\u5bf9\u5e94\u4e86\u603b\u51717\u6761\u6570\u636e\uff0c\u8fd9\u4e9b\u6570\u636e\u90fd\u4f1a\u88ab\u62c9\u53d6\u5230\u540c\u4e00\u4e2atask\u4e2d\u8fdb\u884c\u5904\u7406\uff1b\u800cworld\u548cyou\u8fd9\u4e24\u4e2akey\u5206\u522b\u624d\u5bf9\u5e941\u6761\u6570\u636e\uff0c\u6240\u4ee5\u53e6\u5916\u4e24\u4e2atask\u53ea\u8981\u5206\u522b\u5904\u74061\u6761\u6570\u636e\u5373\u53ef\u3002\u6b64\u65f6\u7b2c\u4e00\u4e2atask\u7684\u8fd0\u884c\u65f6\u95f4\u53ef\u80fd\u662f\u53e6\u5916\u4e24\u4e2atask\u76847\u500d\uff0c\u800c\u6574\u4e2astage\u7684\u8fd0\u884c\u901f\u5ea6\u4e5f\u7531\u8fd0\u884c\u6700\u6162\u7684\u90a3\u4e2atask\u6240\u51b3\u5b9a\u3002<\/p>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2021\/02\/image-1612410097214.png\" style=\"zoom:70%\" \/><\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<h4>\u95ee\u9898\u73b0\u8c61<\/h4>\n<pre><code class=\"language-sql\">--\u6267\u884c\u5361\u6b7b\u7684sql\u8bed\u53e5\nSELECT\n    a.cust_id AS apptid --\u6295\u4fdd\u4ebaID\n     , h.GENDERCODE_N AS GENDERCODE_N1\n     , to_char(a.CVALIDATE, 'YYYY')\n        - to_char(h.BIRTHDAY, 'YYYY') AS age1\n     , CASE WHEN a.PERSONTYPE_ID = '0' THEN\n             a.cust_id\n             WHEN a.PERSONTYPE_ID = '1' THEN\n             b.cust_id\n        END AS insur_id ---\u88ab\u4fdd\u4ebaID\n     , i.GENDERCODE_N AS GENDERCODE_N2\n     , to_char(a.CVALIDATE, 'YYYY')\n        - to_char(i.BIRTHDAY, 'YYYY') AS age2\n     , a.polno --\u4fdd\u5355\u53f7\n     , a.CVALIDATE --\u751f\u6548\u65f6\u95f4\n     , c.applydate\n     , CASE WHEN c.REALPAY1 IS NULL THEN\n             '\u5426'\n        ELSE\n            '\u662f'\n        END AS givetype\n     , c.REALPAY1\n     , c.result\n     , i.CONTACTADD\n     , e.CORRECT_REL_NAME\n     , CASE WHEN a.SALECHNL = 'n2' AND a.agentcode LIKE '00%' THEN\n             '\u4ee3\u7406\u4eba\u5fae\u4fe1'\n        ELSE\n            f.channel_name\n        END AS salechnl\n     , CASE WHEN a.agentcode LIKE 'WX%' THEN\n             g.wx_name\n        END AS third\n     , a.RISKCODE_N --\u4e3b\u9669\u540d\u79f0\n     , to_char(a.PAYENDDATE, 'YYYY')\n        - to_char(a.CVALIDATE, 'YYYY') AS jiaofei\n     , a.YEARS\n     , a.STATETYPE\nFROM\n    SUM_CU_RISK_DTL a\n    LEFT JOIN SUM_CU_RISK_DTL b\n    ON a.polno = b.polno AND b.PERSONTYPE_ID IN ('2')\n    LEFT JOIN pro_claim c\n    ON trim(c.contno) = a.polno\n    LEFT JOIN ITG_IP_FAML_ALL_D d\n    ON d.polno = a.polno AND stat_day = '20210202'\n    LEFT JOIN D_CORRECT_REL e\n    ON d.CORRECT_REL = e.CORRECT_REL\n    LEFT JOIN D_SALECHNL f\n    ON f.salechnl_id = a.SALECHNL\n    LEFT JOIN d_agent_wx g\n    ON g.wx_id = a.agentcode\n    LEFT JOIN sum_cu_per h\n    ON h.cust_id = a.cust_id\n    LEFT JOIN sum_cu_per i\n    ON i.cust_id\n        = (CASE\n            WHEN a.PERSONTYPE_ID = '0' THEN a.cust_id\n            WHEN a.PERSONTYPE_ID = '1' THEN b.cust_id\n           END)\nWHERE\n     a.polno\n     IN (SELECT\n           DISTINCT polno\n         FROM\n           SUM_CU_RISK_DTL\n         WHERE\n           riskcode IN ('5310063', '5310040', '5310122', '5310265'))\n     AND a.RISKSUBTYPE = 'M'\n     AND a.PERSONTYPE_ID IN ('0', '1')\n     AND a.STATETYPE IN ('1', '4');<\/code><\/pre>\n<h4>\u6392\u67e5\u601d\u8def<\/h4>\n<p><strong>\u4e0a\u8ff0\u662f\u4e00\u6bb5\u53d6\u81ea\u5ba2\u6237\u7684\u6570\u636e\u503e\u659c\u7684\u8bed\u53e5\uff0c\u901a\u8fc7DAG\u56fe\u53ef\u4ee5\u770b\u5230\u5728\u6267\u884c\u548ch\u8868\u7684common join\u8fc7\u7a0b\u4e2d\uff0c\u8be5stage\u7684\u4e00\u4e2atask\u6709\u660e\u663e\u7684\u62d6\u5c3e\u73b0\u8c61\u3002\u6240\u4ee5\u57fa\u672c\u53ef\u4ee5\u65ad\u5b9a\u662f\u8fd9\u4e24\u4fa7\u7684joinkey\u6570\u636e\u8fc7\u4e8e\u96c6\u4e2d\u5bfc\u81f4\u7684\u3002<\/strong><\/p>\n<p><strong>\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u7684\u8bed\u53e5\uff0c\u5bf9\u4e24\u4fa7\u7684joinkey\u505a\u805a\u5408\u67e5\u8be2\uff0c\u786e\u8ba4\u4e00\u4e0b\u662f\u5426joinkey \u8fc7\u4e8e\u96c6\u4e2d<\/strong><\/p>\n<pre><code class=\"language-sql\">--h\u8868\uff0cjoinkey\u5206\u5e03\u5747\u5300\u4e14\u8be5\u8868\u6570\u636e\u91cf\u8f83\u5927\uff08\u65e0\u6cd5\u8d70mapjoin\uff09\nSELECT cust_id,count(*) FROM sum_cu_per h GROUP BY cust_id ORDER BY 2 DESC LIMIT 10;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2021\/02\/image-1612410459250.png\" style=\"zoom:70%\" \/><\/p>\n<pre><code class=\"language-sql\">--\u524d\u7f6e\u8868\nSELECT a.cust_id, count(*)\n  FROM SUM_CU_RISK_DTL a\n  LEFT JOIN SUM_CU_RISK_DTL b\n    ON a.polno = b.polno\n   AND b.PERSONTYPE_ID IN ('2')\n  LEFT JOIN pro_claim c\n    ON trim(c.contno) = a.polno\n  LEFT JOIN ITG_IP_FAML_ALL_D d\n    ON d.polno = a.polno\n   AND stat_day = '20210202'\n  LEFT JOIN D_CORRECT_REL e\n    ON d.CORRECT_REL = e.CORRECT_REL\n  LEFT JOIN D_SALECHNL f\n    ON f.salechnl_id = a.SALECHNL\n  LEFT JOIN d_agent_wx g\n    ON g.wx_id = a.agentcode\n WHERE a.RISKSUBTYPE = 'M'\n   AND a.PERSONTYPE_ID IN ('0', '1')\n   AND a.STATETYPE IN ('1', '4')\nGROUP BY a.cust_id \nORDER BY 2 DESC \nLIMIT 10;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2021\/02\/image-1612410435187.png\" style=\"zoom:70%\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0c\u5728\u524d\u7f6e\u8868\u51fa\u73b0\u4e86\u5173\u4e8ecust_id\u8fc7\u4e8e\u96c6\u4e2d\u7684\u73b0\u8c61\uff0c<code>XXXX_\u5f20\u6770_0_1964-08-15<\/code>\u7684\u8fd9\u6761\u6570\u636e\u8fbe\u5230\u4e866649w\u6761\uff0c\u5176\u4ed6\u7684\u53ea\u67092-3w\u6761\uff0c\u76f8\u5dee\u51e0\u4e2a\u6570\u91cf\u7ea7\uff1b<\/p>\n<h4>\u89e3\u51b3\u65b9\u6848<\/h4>\n<ol>\n<li>\u4ece\u4e1a\u52a1\u4e0a\u6765\u8bf4\uff0c\u5982\u679c\u8be5\u6761\u6570\u636e\u5bf9\u4f5c\u4e1a\u7684\u6267\u884c\u548c\u8ba1\u7b97\u7ed3\u679c\u4e0d\u662f\u7279\u522b\u91cd\u8981\u7684\u8bdd\uff0c\u90a3\u4e48\u5e72\u8106\u5c31\u76f4\u63a5\u8fc7\u6ee4\u6389\u8fd9\u4e2akey\uff1b<br \/>\n<em>&#8211;\u5f53\u524d\u95ee\u9898\uff0c\u5ba2\u6237\u4e0d\u540c\u610f\u5254\u9664\u8be5key.<\/em><\/li>\n<li>\u5982\u679c\u662f\u7ef4\u5ea6\u8868\u91cd\u590d\u6570\u636e\u8fc7\u591a\uff0c\u53ef\u4ee5\u8003\u8651\u5bf9\u7ef4\u5ea6\u8868distinct\u53bb\u91cd\uff1b<br \/>\n<em>&#8211;\u5f53\u524d\u95ee\u9898\uff0ch\u8868\u91cd\u590d\u6570\u636e\u6700\u591a2\u6761\u6240\u4ee5\u5e76\u4e0d\u9002\u7528.<\/em><\/li>\n<li>\u6539\u5199sql\uff0c\u5c06\u8fd9\u4e2a\u503e\u659c\u7684key\u503c\u5355\u72ec\u62ce\u51fa\u6765\u8d70mapjoin\uff0c\u4e0d\u8d70shuffle\uff0c\u7136\u540e\u4e0e\u5176\u4ed6key \u503c\u7684\u7ed3\u679c\u96c6\u505aunion all\uff1b<br \/>\n<em>&#8211;\u5982\u4e0b.<\/em><\/li>\n<\/ol>\n<p><strong>\u6539\u5199sql \u7684\u903b\u8f91\uff0c\u5c31\u662f\u628a<code>cust_id=&#039;XXXX_0_\u5f20\u6770_0_1964-08-15&#039;<\/code>\u7684\u8fd9\u6761\u8bb0\u5f55\u5355\u72ec\u62ff\u51fa\u6765\uff0c\u548ch\u8868\u7684\u8fd9\u6761\u8bb0\u5f55\u8d70mapjoin\uff08\u53ea\u67092\u6761\uff09\uff0c\u89c4\u907f\u6389shuffle\u8fc7\u7a0b\uff1b\u7ed3\u679c\u96c6\u518dunion all\uff0c\u6539\u5199\u540e\u5982\u4e0b<\/strong><\/p>\n<pre><code class=\"language-sql\">SELECT\n  --Select expressions\u90e8\u5206\u7701\u7565\n  FROM SUM_CU_RISK_DTL a\n  LEFT JOIN SUM_CU_RISK_DTL b\n    ON a.polno = b.polno\n   AND b.PERSONTYPE_ID IN ('2')\n  LEFT JOIN pro_claim c\n    ON trim(c.contno) = a.polno\n  LEFT JOIN ITG_IP_FAML_ALL_D d\n    ON d.polno = a.polno\n   AND stat_day = '20210202'\n  LEFT JOIN D_CORRECT_REL e\n    ON d.CORRECT_REL = e.CORRECT_REL\n  LEFT JOIN D_SALECHNL f\n    ON f.salechnl_id = a.SALECHNL\n  LEFT JOIN d_agent_wx g\n    ON g.wx_id = a.agentcode\n  LEFT JOIN sum_cu_per h\n    ON h.cust_id = a.cust_id\n  LEFT JOIN sum_cu_per i\n    ON i.cust_id = (CASE\n         WHEN a.PERSONTYPE_ID = '0' THEN\n          a.cust_id\n         WHEN a.PERSONTYPE_ID = '1' THEN\n          b.cust_id\n       END)\n WHERE a.polno IN\n       (SELECT DISTINCT polno\n          from SUM_CU_RISK_DTL\n         where riskcode in ('5310063', '5310040', '5310122', '5310265'))\n   AND a.RISKSUBTYPE = 'M'\n   AND a.PERSONTYPE_ID IN ('0', '1')\n   AND a.STATETYPE IN ('1', '4')\n   --ppd\u4f18\u5316\u5668\uff0c\u5728\u8fd9\u91cc\u5bf9a\u8868\u505aFilterOperator\u7b49\u540c\u4e8e\u653e\u5728TableScanOperator\u91cc\u9762\n   AND a.cust_id != 'XXXX__\u5f20\u6770_0_1964-08-15'\nUNION ALL\nSELECT\n  --\u4e3a\u4e86\u9632\u6b62h\u4e0d\u8d70\u5c0f\u8868\u5e7f\u64ad\uff0c\u53ef\u4ee5\u5f3a\u5236hint\n  \/*+ MAPJOIN(h)*\/\n  --Select expressions\u90e8\u5206\u7701\u7565\n  FROM SUM_CU_RISK_DTL a\n  LEFT JOIN SUM_CU_RISK_DTL b\n    ON a.polno = b.polno\n   AND b.PERSONTYPE_ID IN ('2')\n  LEFT JOIN pro_claim c\n    ON trim(c.contno) = a.polno\n  LEFT JOIN ITG_IP_FAML_ALL_D d\n    ON d.polno = a.polno\n   AND stat_day = '20210202'\n  LEFT JOIN D_CORRECT_REL e\n    ON d.CORRECT_REL = e.CORRECT_REL\n  LEFT JOIN D_SALECHNL f\n    ON f.salechnl_id = a.SALECHNL\n  LEFT JOIN d_agent_wx g\n    ON g.wx_id = a.agentcode\n  --\u91cd\u70b9\u5173\u6ce8\u4e0b\u9762\u8fd9\u90e8\u5206\n  LEFT JOIN (select GENDERCODE_N, BIRTHDAY, cust_id\n               from sum_cu_per\n              where cust_id = 'XXXX_0_\u5f20\u6770_0_1964-08-15') h\n    ON h.cust_id = a.cust_id\n  LEFT JOIN sum_cu_per i\n    ON i.cust_id = (CASE\n         WHEN a.PERSONTYPE_ID = '0' THEN\n          a.cust_id\n         WHEN a.PERSONTYPE_ID = '1' THEN\n          b.cust_id\n       END)\n WHERE a.polno IN\n       (SELECT DISTINCT polno\n          from SUM_CU_RISK_DTL\n         where riskcode in ('5310063', '5310040', '5310122', '5310265'))\n   AND a.RISKSUBTYPE = 'M'\n   AND a.PERSONTYPE_ID IN ('0', '1')\n   AND a.STATETYPE IN ('1', '4')\n   --ppd\u4f18\u5316\u5668\uff0c\u5728\u8fd9\u91cc\u5bf9a\u8868\u505aFilterOperator\u7b49\u540c\u4e8e\u653e\u5728TableScanOperator\u91cc\u9762\n   AND a.cust_id = 'XXXX_0_\u5f20\u6770_0_1964-08-15';<\/code><\/pre>\n<h4>FAQ<\/h4>\n<p><strong>\u67e5\u627e\u96c6\u4e2d\u7684joinkey\u7684\u65b9\u6cd5\uff1a<\/strong><\/p>\n<p>\u8fd9\u4e2a\u662f\u539f\u59cb\u7684\u62a5\u9519\u8bed\u53e5\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT \n    ...\nFROM ods.ods_hisdb_DrugPC a\nINNER JOIN ods.ods_hisdb_vdrugwastebook_df b \nON a.kcid = b.serialno  AND b.ds='20240107'\nWHERE a.status IN (2) and a.tabletype='mid';<\/code><\/pre>\n<p>\u6211\u4eec\u901a\u8fc7\u5982\u4e0bsql\u6392\u67e5joinkey\u7684\u96c6\u4e2d\u60c5\u51b5\uff1a<\/p>\n<p><strong>\u65b9\u6cd5\u4e00\uff1a\u5206\u522b\u805a\u5408\u67e5\u8be2\u7edf\u8ba1<\/strong><\/p>\n<pre><code class=\"language-sql\">SELECT a.kcid, count(*) AS cnt1 \nFROM ods.ods_hisdb_DrugPC a WHERE a.status IN (2) and a.tabletype='mid' GROUP BY a.kcid ORDER BY cnt1 desc limit 10;\n\nSELECT b.serialno, count(*) AS cnt2 \nFROM  ods.ods_hisdb_vdrugwastebook_df b GROUP BY b.serialno ORDER BY cnt2 desc limit 10;<\/code><\/pre>\n<p><strong>\u65b9\u6cd5\u4e8c\uff1a\u5982\u679c\u503e\u659c\u4e0d\u662f\u592a\u4e25\u91cd\uff0c\u80fdjoin\u51fa\u7ed3\u679c\uff0c\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u65b9\u5f0f\u7ee7\u7eed\u5224\u65ad\uff1a<\/strong><\/p>\n<pre><code class=\"language-sql\">SELECT t1.empno,count(*) AS cnt  \nFROM emp t1 \nJOIN emp_orc t2 \nON t1.empno=t2.empno \nWHERE a.status IN (2) and a.tabletype='mid'\nGROUP BY t1.empno ORDER BY cnt DESC LIMIT 10;<\/code><\/pre>\n<p><strong>\u65b9\u6cd5\u4e09\uff1a\u5982\u679c\u503e\u659c\u975e\u5e38\u4e25\u91cd\uff0cjoin\u4e0d\u51fa\u7ed3\u679c\uff0c\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u65b9\u5f0f\u7ee7\u7eed\u5224\u65ad\uff08\u4f1a\u5c55\u793a\u51fa\u5de6\u53f3joinkey\u7684\u6570\u91cf\uff09\uff1a<\/strong><\/p>\n<p>\u6ce8\u610f\uff1a\u4e0b\u9762\u7684\u8bed\u53e5\u4f1a\u628anull\u7684\u573a\u666f\u5ffd\u7565\u6389<\/p>\n<pre><code class=\"language-sql\">WITH tb1 AS \n(SELECT a.kcid, count(*) AS cnt1 FROM ods.ods_hisdb_DrugPC a WHERE a.status IN (2) and a.tabletype='mid' GROUP BY a.kcid ),\ntb2 AS \n(SELECT b.serialno, count(*) AS cnt2 FROM ods.ods_hisdb_vdrugwastebook_df b GROUP BY b.serialno )\nSELECT tb1.kcid,tb1.cnt1,tb2.cnt2,tb1.cnt1*tb2.cnt2 AS totalcnt \nFROM tb1 \nJOIN tb2\nON tb1.kcid=tb2.serialno\nORDER BY totalcnt DESC \nLIMIT 10;<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 \u6ce8\u610f\uff1aargodb\u9ad8\u7248\u672c\u652f\u6301skewjoin\uff0c\u53ef\u4ee5\u901a\u8fc7skewjoin\u89e3\u51b3\u90e8\u5206jonkey\u503e\u659c\u7684\u95ee\u9898 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=5217\" 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":[46],"tags":[],"class_list":["post-5217","post","type-post","status-publish","format-standard","hentry","category-performance"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5217","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=5217"}],"version-history":[{"count":4,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5217\/revisions"}],"predecessor-version":[{"id":16051,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5217\/revisions\/16051"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}