{"id":174183,"date":"2024-11-07T20:44:22","date_gmt":"2024-11-07T12:44:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174183\/"},"modified":"2024-11-07T20:44:22","modified_gmt":"2024-11-07T12:44:22","slug":"%e5%a6%82%e4%bd%95%e8%a7%a3%e6%b1%basql%e6%95%b8%e6%93%9a%e5%ba%ab%e9%ab%94%e7%a9%8d%e5%a4%a7%e7%9a%84%e5%95%8f%e9%a1%8c-sql%e6%95%b8%e6%93%9a%e5%ba%ab%e9%ab%94%e7%a9%8d%e5%a4%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174183\/","title":{"rendered":"\u5982\u4f55\u89e3\u6c7aSQL\u6578\u64da\u5eab\u9ad4\u7a4d\u5927\u7684\u554f\u984c (sql\u6578\u64da\u5eab\u9ad4\u7a4d\u5927)"},"content":{"rendered":"

\u5982\u4f55\u89e3\u6c7aSQL\u6578\u64da\u5eab\u9ad4\u7a4d\u5927\u7684\u554f\u984c<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0cSQL\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u8a31\u591a\u4f01\u696d\u548c\u958b\u767c\u8005\u9762\u81e8\u8457\u6578\u64da\u5eab\u9ad4\u7a4d\u904e\u5927\u7684\u6311\u6230\u3002\u9019\u4e0d\u50c5\u5f71\u97ff\u4e86\u6578\u64da\u5eab\u7684\u6027\u80fd\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u5b58\u5132\u6210\u672c\u7684\u589e\u52a0\u548c\u7dad\u8b77\u7684\u56f0\u96e3\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u6709\u6548\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u4ee5\u5e6b\u52a9\u60a8\u7ba1\u7406\u548c\u512a\u5316SQL\u6578\u64da\u5eab\u7684\u9ad4\u7a4d\u3002<\/p>\n

1. \u6578\u64da\u6e05\u7406<\/h2>\n

\u5b9a\u671f\u9032\u884c\u6578\u64da\u6e05\u7406\u662f\u6e1b\u5c11\u6578\u64da\u5eab\u9ad4\u7a4d\u7684\u6709\u6548\u65b9\u6cd5\u3002\u9019\u5305\u62ec\u522a\u9664\u4e0d\u518d\u9700\u8981\u7684\u6578\u64da\uff0c\u5982\u904e\u671f\u7684\u8a18\u9304\u3001\u91cd\u8907\u7684\u6578\u64da\u548c\u7121\u6548\u7684\u689d\u76ee\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u67e5\u627e\u548c\u522a\u9664\u91cd\u8907\u7684\u8a18\u9304\uff1a<\/p>\n

DELETE FROM your_table\nWHERE id NOT IN (\n    SELECT MIN(id)\n    FROM your_table\n    GROUP BY column1, column2\n);<\/code><\/pre>\n
\u6b64\u5916\uff0c\u5b9a\u671f\u6aa2\u67e5\u548c\u522a\u9664\u904e\u671f\u7684\u6578\u64da\u4e5f\u80fd\u986f\u8457\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u5927\u5c0f\u3002<\/p>\n
2. \u6578\u64da\u58d3\u7e2e<\/h2>\n
\u6578\u64da\u58d3\u7e2e\u6280\u8853\u53ef\u4ee5\u5e6b\u52a9\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u5b58\u5132\u9700\u6c42\u3002\u8a31\u591a\u73fe\u4ee3\u7684SQL\u6578\u64da\u5eab\u7cfb\u7d71\uff08\u5982MySQL\u548cPostgreSQL\uff09\u90fd\u63d0\u4f9b\u4e86\u6578\u64da\u58d3\u7e2e\u7684\u529f\u80fd\u3002\u901a\u904e\u555f\u7528\u58d3\u7e2e\uff0c\u60a8\u53ef\u4ee5\u5728\u4e0d\u640d\u5931\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\uff0c\u986f\u8457\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u9ad4\u7a4d\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u4f86\u555f\u7528\u8868\u7684\u58d3\u7e2e\uff1a<\/p>\n
ALTER TABLE your_table ROW_FORMAT=COMPRESSED;<\/code><\/pre>\n
3. \u5206\u5340\u6280\u8853<\/h2>\n
\u5206\u5340\u662f\u4e00\u7a2e\u5c07\u5927\u578b\u8868\u62c6\u5206\u70ba\u66f4\u5c0f\u3001\u66f4\u6613\u65bc\u7ba1\u7406\u7684\u90e8\u5206\u7684\u6280\u8853\u3002\u9019\u4e0d\u50c5\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u9084\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u5eab\u7684\u9ad4\u7a4d\u3002\u901a\u904e\u5c07\u6578\u64da\u6309\u65e5\u671f\u3001\u985e\u5225\u6216\u5176\u4ed6\u6a19\u6e96\u9032\u884c\u5206\u5340\uff0c\u60a8\u53ef\u4ee5\u66f4\u8f15\u9b06\u5730\u7ba1\u7406\u548c\u7dad\u8b77\u6578\u64da\u3002\u4f8b\u5982\uff0c\u5728MySQL\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u5275\u5efa\u5206\u5340\u8868\uff1a<\/p>\n
CREATE TABLE your_table (\n    id INT,\n    data VARCHAR(100),\n    created_at DATE\n) PARTITION BY RANGE (YEAR(created_at)) (\n    PARTITION p0 VALUES LESS THAN (2020),\n    PARTITION p1 VALUES LESS THAN (2021),\n    PARTITION p2 VALUES LESS THAN (2022)\n);<\/code><\/pre>\n
4. \u4f7f\u7528\u7d22\u5f15<\/h2>\n
\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u5f9e\u800c\u6e1b\u5c11\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\u548c\u8cc7\u6e90\u3002\u96d6\u7136\u7d22\u5f15\u672c\u8eab\u6703\u4f54\u7528\u984d\u5916\u7684\u7a7a\u9593\uff0c\u4f46\u5b83\u5011\u53ef\u4ee5\u5e6b\u52a9\u6e1b\u5c11\u67e5\u8a62\u6642\u7684\u8a08\u7b97\u8ca0\u64d4\uff0c\u5f9e\u800c\u63d0\u9ad8\u6574\u9ad4\u6027\u80fd\u3002\u78ba\u4fdd\u70ba\u7d93\u5e38\u67e5\u8a62\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u4e26\u5b9a\u671f\u6aa2\u67e5\u548c\u91cd\u5efa\u7d22\u5f15\u4ee5\u4fdd\u6301\u5176\u6548\u7387\u3002<\/p>\n
5. \u6578\u64da\u6b78\u6a94<\/h2>\n
\u5c0d\u65bc\u4e0d\u518d\u7d93\u5e38\u4f7f\u7528\u7684\u820a\u6578\u64da\uff0c\u8003\u616e\u5c07\u5176\u6b78\u6a94\u5230\u5176\u4ed6\u5b58\u5132\u7cfb\u7d71\u4e2d\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u4e3b\u6578\u64da\u5eab\u7684\u9ad4\u7a4d\uff0c\u540c\u6642\u4ecd\u7136\u4fdd\u7559\u5c0d\u6b77\u53f2\u6578\u64da\u7684\u8a2a\u554f\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528ETL\uff08\u63d0\u53d6\u3001\u8f49\u63db\u3001\u52a0\u8f09\uff09\u5de5\u5177\u5c07\u6578\u64da\u8f49\u79fb\u5230\u6578\u64da\u5009\u5eab\u6216\u5176\u4ed6\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u4e2d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u89e3\u6c7aSQL\u6578\u64da\u5eab\u9ad4\u7a4d\u5927\u7684\u554f\u984c\u9700\u8981\u7d9c\u5408\u8003\u616e\u591a\u7a2e\u7b56\u7565\uff0c\u5305\u62ec\u6578\u64da\u6e05\u7406\u3001\u6578\u64da\u58d3\u7e2e\u3001\u5206\u5340\u6280\u8853\u3001\u4f7f\u7528\u7d22\u5f15\u548c\u6578\u64da\u6b78\u6a94\u7b49\u3002\u901a\u904e\u9019\u4e9b\u65b9\u6cd5\uff0c\u60a8\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u5eab\u7684\u9ad4\u7a4d\uff0c\u63d0\u5347\u6027\u80fd\uff0c\u4e26\u964d\u4f4e\u5b58\u5132\u6210\u672c\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u89e3\u6c7aSQL\u6578\u64da\u5eab\u9ad4\u7a4d\u904e\u5927\u7684\u554f\u984c\uff0c\u5305\u62ec\u6578\u64da\u6e05\u7406\u3001\u58d3\u7e2e\u548c\u512a\u5316\u7b56\u7565\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-174183","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=174183"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174183\/revisions"}],"predecessor-version":[{"id":174184,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/174183\/revisions\/174184"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=174183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=174183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=174183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}