{"id":6261,"date":"2024-11-14T10:27:11","date_gmt":"2024-11-14T02:27:11","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6261\/"},"modified":"2024-11-14T10:27:11","modified_gmt":"2024-11-14T02:27:11","slug":"sql%e4%bc%98%e5%8c%96%e5%b8%b8%e7%94%a8%e7%9a%84%e5%87%a0%e7%a7%8d%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6261\/","title":{"rendered":"sql\u4f18\u5316\u5e38\u7528\u7684\u51e0\u79cd\u65b9\u6cd5"},"content":{"rendered":"<p><strong>sql \u4f18\u5316\u5e38\u7528\u7684\u65b9\u6cd5<\/strong><\/p>\n<p><strong>\u95ee\u9898\uff1a\u5e38\u7528\u7684 SQL \u4f18\u5316\u65b9\u6cd5\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n<p><strong>\u7b54\u6848\uff1a<\/strong>\u5e38\u7528\u7684 SQL \u4f18\u5316\u65b9\u6cd5\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a<\/p>\n<p><strong>1. \u7d22\u5f15\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u521b\u5efa\u9002\u5f53\u7684\u7d22\u5f15\u4ee5\u52a0\u901f\u67e5\u8be2\uff0c\u51cf\u5c11\u8868\u626b\u63cf\u3002<\/li>\n<li>\u5220\u9664\u4e0d\u5fc5\u8981\u7684\u7d22\u5f15\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>2. \u67e5\u8be2\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u6b63\u786e\u7684\u67e5\u8be2\u7c7b\u578b\uff08\u5982 SELECT\u3001INSERT\u3001UPDATE\uff09\u3002<\/li>\n<li>\u4f7f\u7528\u9002\u5f53\u7684 JOIN \u6761\u4ef6\u3002<\/li>\n<li>\u4f7f\u7528\u5b50\u67e5\u8be2\u4ee3\u66ff\u591a\u8868\u8fde\u63a5\u3002<\/li>\n<\/ul>\n<p><strong>3. \u6570\u636e\u7ed3\u6784\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u9009\u62e9\u5408\u9002\u7684\u8868\u7ed3\u6784\uff0c\u4f8b\u5982\u89c4\u8303\u5316\u6216\u975e\u89c4\u8303\u5316\u3002<\/li>\n<li>\u4f7f\u7528\u5408\u9002\u7684\u5b57\u6bb5\u7c7b\u578b\u3002<\/li>\n<li>\u5c3d\u91cf\u907f\u514d\u4f7f\u7528 NULL \u503c\u3002<\/li>\n<\/ul>\n<p><strong>4. \u67e5\u8be2\u7f13\u5b58<\/strong><\/p>\n<ul>\n<li>\u542f\u7528\u67e5\u8be2\u7f13\u5b58\u4ee5\u5b58\u50a8\u7ecf\u5e38\u6267\u884c\u7684\u67e5\u8be2\u7684\u7ed3\u679c\u3002<\/li>\n<li>\u4f18\u5316\u7f13\u5b58\u8bbe\u7f6e\u4ee5\u63d0\u9ad8\u547d\u4e2d\u7387\u3002<\/li>\n<\/ul>\n<p><strong>5. \u8fde\u63a5\u6c60\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u8fde\u63a5\u6c60\u4ee5\u590d\u7528\u6570\u636e\u5e93\u8fde\u63a5\u3002<\/li>\n<li>\u8c03\u6574\u8fde\u63a5\u6c60\u5927\u5c0f\u4ee5\u5e73\u8861\u6027\u80fd\u548c\u8d44\u6e90\u5229\u7528\u3002<\/li>\n<\/ul>\n<p><strong>6. \u4e8b\u52a1\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u907f\u514d\u5d4c\u5957\u4e8b\u52a1\u3002<\/li>\n<li>\u4f7f\u7528\u9002\u5f53\u7684\u9694\u79bb\u7ea7\u522b\u3002<\/li>\n<li>\u4f7f\u7528\u6279\u5904\u7406\u64cd\u4f5c\u6765\u6346\u7ed1\u66f4\u65b0\u3002<\/li>\n<\/ul>\n<p><strong>7. \u786c\u4ef6\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u5347\u7ea7\u786c\u4ef6\uff08\u4f8b\u5982 CPU\u3001\u5185\u5b58\uff09\u3002<\/li>\n<li>\u4f7f\u7528 SSD \u6216 NVMe \u5b58\u50a8\u3002<\/li>\n<\/ul>\n<p><strong>8. \u6570\u636e\u5e93\u7ef4\u62a4<\/strong><\/p>\n<ul>\n<li>\u5b9a\u671f\u8fd0\u884c\u7d22\u5f15\u7ef4\u62a4\u4efb\u52a1\u3002<\/li>\n<li>\u4f18\u5316\u8868\u7684\u7edf\u8ba1\u4fe1\u606f\u3002<\/li>\n<li>\u6e05\u7406\u672a\u4f7f\u7528\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<p><strong>9. \u67e5\u8be2\u6027\u80fd\u5206\u6790<\/strong><\/p>\n<ul>\n<li>\u4f7f\u7528\u67e5\u8be2\u5206\u6790\u5de5\u5177\uff08\u4f8b\u5982 EXPLAIN\uff09\u6765\u8bc6\u522b\u67e5\u8be2\u74f6\u9888\u3002<\/li>\n<li>\u8c03\u6574\u67e5\u8be2\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p><strong>10. \u51fd\u6570\u548c\u5b58\u50a8\u8fc7\u7a0b\u4f18\u5316<\/strong><\/p>\n<ul>\n<li>\u521b\u5efa\u548c\u4f7f\u7528\u81ea\u5b9a\u4e49\u51fd\u6570\u548c\u5b58\u50a8\u8fc7\u7a0b\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<li>\u907f\u514d\u5728\u51fd\u6570\u4e2d\u4f7f\u7528\u6602\u8d35\u7684\u64cd\u4f5c\uff08\u4f8b\u5982\u8868\u626b\u63cf\uff09\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5e38\u7528\u7684\u51e0\u79cd\u65b9\u6cd5\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql \u4f18\u5316\u5e38\u7528\u7684\u65b9\u6cd5 \u95ee\u9898\uff1a\u5e38\u7528\u7684 SQL \u4f18\u5316\u65b9\u6cd5\u6709\u54ea\u4e9b\uff1f \u7b54\u6848\uff1a\u5e38\u7528\u7684 SQL \u4f18\u5316\u65b9\u6cd5\u5305\u62ec\u4ee5\u4e0b\u51e0\u79cd\uff1a 1. \u7d22\u5f15\u4f18\u5316 \u521b\u5efa\u9002\u5f53\u7684\u7d22\u5f15\u4ee5\u52a0\u901f\u67e5\u8be2\uff0c\u51cf\u5c11\u8868\u626b\u63cf\u3002 \u5220\u9664\u4e0d\u5fc5\u8981\u7684\u7d22\u5f15\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002 2. \u67e5\u8be2\u4f18\u5316 \u4f7f\u7528\u6b63\u786e\u7684\u67e5\u8be2\u7c7b\u578b\uff08\u5982 SELECT\u3001INSERT\u3001UPDATE\uff09\u3002 \u4f7f\u7528\u9002\u5f53\u7684 JOIN \u6761\u4ef6\u3002 \u4f7f\u7528\u5b50\u67e5\u8be2\u4ee3\u66ff\u591a\u8868\u8fde\u63a5\u3002 3. \u6570\u636e\u7ed3\u6784\u4f18\u5316 \u9009\u62e9\u5408\u9002\u7684\u8868\u7ed3\u6784\uff0c\u4f8b\u5982\u89c4\u8303\u5316\u6216\u975e\u89c4\u8303\u5316\u3002 \u4f7f\u7528\u5408\u9002\u7684\u5b57\u6bb5\u7c7b\u578b\u3002 \u5c3d\u91cf\u907f\u514d\u4f7f\u7528 NULL \u503c\u3002 4. \u67e5\u8be2\u7f13\u5b58 \u542f\u7528\u67e5\u8be2\u7f13\u5b58\u4ee5\u5b58\u50a8\u7ecf\u5e38\u6267\u884c\u7684\u67e5\u8be2\u7684\u7ed3\u679c\u3002 \u4f18\u5316\u7f13\u5b58\u8bbe\u7f6e\u4ee5\u63d0\u9ad8\u547d\u4e2d\u7387\u3002 5. \u8fde\u63a5\u6c60\u4f18\u5316 \u4f7f\u7528\u8fde\u63a5\u6c60\u4ee5\u590d\u7528\u6570\u636e\u5e93\u8fde\u63a5\u3002 \u8c03\u6574\u8fde\u63a5\u6c60\u5927\u5c0f\u4ee5\u5e73\u8861\u6027\u80fd\u548c\u8d44\u6e90\u5229\u7528\u3002 6. \u4e8b\u52a1\u4f18\u5316 \u907f\u514d\u5d4c\u5957\u4e8b\u52a1\u3002 \u4f7f\u7528\u9002\u5f53\u7684\u9694\u79bb\u7ea7\u522b\u3002 \u4f7f\u7528\u6279\u5904\u7406\u64cd\u4f5c\u6765\u6346\u7ed1\u66f4\u65b0\u3002 7. \u786c\u4ef6\u4f18\u5316 \u5347\u7ea7\u786c\u4ef6\uff08\u4f8b\u5982 CPU\u3001\u5185\u5b58\uff09\u3002 \u4f7f\u7528 SSD \u6216 NVMe \u5b58\u50a8\u3002 8. \u6570\u636e\u5e93\u7ef4\u62a4 \u5b9a\u671f\u8fd0\u884c\u7d22\u5f15\u7ef4\u62a4\u4efb\u52a1\u3002 \u4f18\u5316\u8868\u7684\u7edf\u8ba1\u4fe1\u606f\u3002 \u6e05\u7406\u672a\u4f7f\u7528\u7684\u5bf9\u8c61\u3002 9. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6261","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6261","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6261"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6261\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6261"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6261"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6261"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}