<\/span><\/h3>\n\n\n\n\u76f4\u63a5\u6267\u884c\u4f1a\u62a5\u9519\uff0c\u9700\u8981\u8bbe\u7f6e\u53c2\u6570 Set allow_experimental_window_functions = 1<\/p>\n\n\n\n
gbase_rh7_001 :) select id,name,rank() over (partition by birthday order by name) ran from t1;\n\nSELECT\n id,\n name,\n rank() OVER (PARTITION BY birthday ORDER BY name ASC) AS ran\nFROM t1\n\nQuery id: 152d1f62-8ddb-4fbd-b46a-764234004851\n\n\n0 rows in set. Elapsed: 0.003 sec.\n\nReceived exception from server (version 21.3.4):\nCode: 48. DB::Exception: Received from localhost:9000. DB::Exception: The support for window functions is experimental and will change in backwards-incompatible ways in the future releases. Set allow_experimental_window_functions = 1 to enable it. While processing 'rank() OVER (PARTITION BY birthday ORDER BY name ASC) AS ran'.\n\ngbase_rh7_001 :)\ngbase_rh7_001 :) set allow_experimental_window_functions=1;\n\nSET allow_experimental_window_functions = 1\n\nQuery id: 976e4a63-1c6c-44e9-b0ad-9de1dd28b5f6\n\nOk.\n\n0 rows in set. Elapsed: 0.029 sec.\n<\/code><\/pre>\n\n\n\n<\/span>\u6267\u884c\u6548\u679c<\/span><\/h3>\n\n\n\n\u529f\u80fd\u6ca1\u95ee\u9898\uff0c\u6027\u80fd\u8fd8\u6ca1\u6d4b\u8bd5\u8fc7\u3002<\/p>\n\n\n\n
gbase_rh7_001 :) select id,name,rank() over (partition by birthday order by name) ran from t1;\n\nSELECT\n id,\n name,\n rank() OVER (PARTITION BY birthday ORDER BY name ASC) AS ran\nFROM t1\n\nQuery id: 8461d23b-c244-42ab-9f51-d0ea8683727d\n\n\u250c\u2500id\u2500\u252c\u2500name\u2500\u2500\u2500\u252c\u2500ran\u2500\u2510\n\u2502 1 \u2502 First \u2502 1 \u2502\n\u2502 3 \u2502 Second \u2502 2 \u2502\n\u2502 2 \u2502 Second \u2502 1 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2518\n\n3 rows in set. Elapsed: 0.085 sec.\n\ngbase_rh7_001 :)\n<\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
<\/span>row_number over\u7684\u4f8b\u5b50<\/span><\/h2>\n\n\n\n\u6ce8\u610f\u5176\u4e2d\u7684limit 1 by name\u7684\u7528\u6cd5\uff0c\u4e0d\u7528\u518d\u50cf\u5176\u5b83\u6570\u636e\u5e93\u90a3\u6837\u5d4c\u5957\u4e00\u5c42rownum\u4e86\u3002\u76f4\u63a5\u53ef\u4ee5limit\u3002<\/p>\n\n\n\n
gbase_rh7_001 :) select id,name,row_number() over (partition by birthday order by name) ran from t1;\n\nSELECT\n id,\n name,\n row_number() OVER (PARTITION BY birthday ORDER BY name ASC) AS ran\nFROM t1\n\nQuery id: 5446a392-7591-4c17-8618-a34cec6a7d38\n\n\u250c\u2500id\u2500\u252c\u2500name\u2500\u2500\u2500\u252c\u2500ran\u2500\u2510\n\u2502 1 \u2502 First \u2502 1 \u2502\n\u2502 3 \u2502 Second \u2502 2 \u2502\n\u2502 2 \u2502 Second \u2502 1 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2518\n\n3 rows in set. Elapsed: 0.007 sec.\n\ngbase_rh7_001 :) select id,name,row_number() over (partition by birthday order by name) ran from t1 limit for 2;\n\nSyntax error: failed at position 95 ('2'):\n\nselect id,name,row_number() over (partition by birthday order by name) ran from t1 limit for 2;\n\nExpected one of: UNION, LIMIT, BY, LIKE, GLOBAL NOT IN, end of query, AS, DIV, IS, INTO OUTFILE, OR, QuestionMark, BETWEEN, OFFSET, NOT LIKE, MOD, AND, Comma, alias, WITH TIES, SETTINGS, IN, ILIKE, FORMAT, Dot, NOT ILIKE, NOT, Arrow, token, NOT IN, GLOBAL IN\n\ngbase_rh7_001 :) select id,name,row_number() over (partition by birthday order by name) ran from t1 limit 1 by name;\n\nSELECT\n id,\n name,\n row_number() OVER (PARTITION BY birthday ORDER BY name ASC) AS ran\nFROM t1\nLIMIT 1 BY name\n\nQuery id: a325089c-7201-468f-95f6-1ea446bacb89\n\n\u250c\u2500id\u2500\u252c\u2500name\u2500\u2500\u2500\u252c\u2500ran\u2500\u2510\n\u2502 1 \u2502 First \u2502 1 \u2502\n\u2502 3 \u2502 Second \u2502 2 \u2502\n\u2514\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2500\u2534\u2500\u2500\u2500\u2500\u2500\u2518\n\n2 rows in set. Elapsed: 0.013 sec.\n\ngbase_rh7_001 :)\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"\u5728\u5f53\u524d\u7248\u672c\u7684ClickHouse\u91cc\uff0c\u5df2\u7ecf\u5b9e\u9a8c\u6027\u7684\u652f\u6301\u4e86\u7a97\u53e3\u51fd\u6570\uff0c \u6bd4\u5982Rank over partition order\uff0c\u4f46\u4ece\u6267\u884c\u770b\u8fd8\u662f\u5904\u4e8e\u5b9e\u9a8c\u9636\u6bb5\uff0c\u540e\u9762\u3010\u53ef\u80fd\u3011\u5b58\u5728\u5e95\u5c42\u6539\u52a8\uff0c\u9700\u8981\u8bbe\u7f6e\u53c2\u6570Set allow_experimental_window_functions = 1\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[36,77],"class_list":["post-5235","post","type-post","status-publish","format-standard","hentry","category-clickhouse","tag-36","tag-olap"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5235","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=5235"}],"version-history":[{"count":1,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5235\/revisions"}],"predecessor-version":[{"id":5236,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5235\/revisions\/5236"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=5235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=5235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=5235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}