{"id":15021,"date":"2021-09-20T15:56:37","date_gmt":"2021-09-20T15:56:37","guid":{"rendered":"https:\/\/freehost.page\/?p=15021"},"modified":"2021-09-20T15:56:37","modified_gmt":"2021-09-20T15:56:37","slug":"data-tang-giam-tinh-toan","status":"publish","type":"post","link":"https:\/\/kiencang.net\/data-tang-giam-tinh-toan\/","title":{"rendered":"T\u0103ng data \u0111\u1ec3 gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n trong PHP"},"content":{"rendered":"\n<p>Nghe h\u01a1i ngh\u1ecbch l\u00fd nh\u1ec9, nh\u01b0ng n\u1ebfu b\u1ea1n t\u1eebng thao t\u00e1c v\u1edbi kh\u1ed1i d\u1eef li\u1ec7u l\u1edbn b\u1ea1n s\u1ebd s\u1edbm c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5 khi t\u00f4i vi\u1ebft <a href=\"https:\/\/kiencang.net\/php-kiem-tra-chinh-ta-v12\/\" target=\"_blank\" rel=\"noreferrer noopener\">h\u00e0m ki\u1ec3m tra ch\u00ednh t\u1ea3 c\u1ee7a m\u1ed9t t\u1eeb ti\u1ebfng Vi\u1ec7t<\/a>, ho\u1eb7c <a href=\"https:\/\/kiencang.net\/php-chuyen-dau-thanh-v12\/\" target=\"_blank\" rel=\"noreferrer noopener\">h\u00e0m chuy\u1ec3n d\u1ea5u thanh cho t\u1eeb ti\u1ebfng Vi\u1ec7t<\/a>, kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n c\u1ee7a n\u00f3 t\u01b0\u01a1ng \u0111\u1ed1i l\u1edbn v\u00ec h\u00e0m c\u0169ng kh\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 l\u01b0\u1ee3ng d\u1eef li\u1ec7u \u0111\u1ea7u v\u00e0o nhi\u1ec1u.<\/p>\n\n\n\n<p>Gi\u1edd c\u00f3 2 c\u00e1ch \u0111\u1ec3 t\u00f4i x\u1eed l\u00fd d\u1eef li\u1ec7u th\u00f4 m\u1ed7i khi t\u00ednh to\u00e1n:<\/p>\n\n\n\n<ul><li>D\u00f9ng l\u1ea1i c\u00e1c h\u00e0m tr\u00ean khi m\u1ed7i l\u1ea7n x\u1eed l\u00fd v\u1edbi d\u1eef li\u1ec7u th\u00f4 \u0111\u1ea7u v\u00e0o;<\/li><li>Xu\u1ea5t k\u1ebft s\u1eb5n k\u1ebft qu\u1ea3 v\u00e0 ghi v\u00e0o c\u1ed9t d\u1eef li\u1ec7u th\u00edch h\u1ee3p, l\u00fac n\u00e0o c\u1ea7n th\u00ec d\u00f9ng;<\/li><\/ul>\n\n\n\n<p>N\u1ebfu b\u1ea1n ph\u1ea3i li\u00ean t\u1ee5c s\u1eed d\u1ee5ng h\u00e0m t\u00ednh to\u00e1n n\u1eb7ng, th\u1eddi gian gia t\u0103ng t\u00ednh to\u00e1n s\u1ebd t\u0103ng l\u00ean t\u01b0\u01a1ng \u1ee9ng, trong khi vi\u1ec7c l\u1ea5y d\u1eef li\u1ec7u c\u00f3 s\u1eb5n \u0111\u00e3 t\u1ea1o th\u00ec nh\u1eb9 nh\u00e0ng, \u0111\u01a1n gi\u1ea3n h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n\n\n\n<p><strong>K\u1ebft lu\u1eadn \u1edf \u0111\u00e2y l\u00e0<\/strong>: v\u1edbi c\u00e1c x\u1eed l\u00fd \u0111\u01a1n gi\u1ea3n ta s\u1ebd d\u00f9ng h\u00e0m \u0111\u1ec3 x\u1eed l\u00fd tr\u1ef1c ti\u1ebfp m\u1ed7i khi thao t\u00e1c, c\u00f2n \u0111\u1ed1i v\u1edbi c\u00e1c x\u1eed l\u00fd ph\u1ee9c t\u1ea1p, c\u1ed3ng k\u1ec1nh, c\u00e1ch hi\u1ec7u qu\u1ea3 h\u01a1n l\u00e0 ghi lu\u00f4n k\u1ebft qu\u1ea3 \u0111\u00f3 v\u00e0o c\u1ed9t d\u1eef li\u1ec7u m\u1edbi v\u00e0 d\u00f9ng khi c\u1ea7n. T\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd s\u1ebd t\u0103ng l\u00ean \u0111\u00e1ng k\u1ec3, b\u1ea1n ch\u1ec9 m\u1ea5t th\u1eddi gian \u0111\u00fang l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec3 t\u1ea1o v\u00e0 ghi d\u1eef li\u1ec7u, c\u00e1c l\u1ea7n sau l\u00e0 l\u1ea5y lu\u00f4n t\u1eeb b\u1ea3ng csdl (database) r\u1ed3i.<\/p>\n\n\n\n<p>\u0110\u00fang l\u00e0 data t\u0103ng l\u00e0m gi\u1ea3m t\u00ednh to\u00e1n \u0111\u00fang kh\u00f4ng n\u00e0o?!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nghe h\u01a1i ngh\u1ecbch l\u00fd nh\u1ec9, nh\u01b0ng n\u1ebfu b\u1ea1n t\u1eebng thao t\u00e1c v\u1edbi kh\u1ed1i d\u1eef li\u1ec7u l\u1edbn b\u1ea1n s\u1ebd s\u1edbm c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. V\u00ed d\u1ee5 khi t\u00f4i vi\u1ebft h\u00e0m ki\u1ec3m tra ch\u00ednh t\u1ea3 c\u1ee7a m\u1ed9t t\u1eeb ti\u1ebfng Vi\u1ec7t, ho\u1eb7c h\u00e0m chuy\u1ec3n d\u1ea5u thanh cho t\u1eeb ti\u1ebfng Vi\u1ec7t, kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n c\u1ee7a n\u00f3 t\u01b0\u01a1ng &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[238],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T\u0103ng data \u0111\u1ec3 gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n trong PHP &#8226; Ki\u1ebfn c\u00e0ng<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kiencang.net\/data-tang-giam-tinh-toan\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u0103ng data \u0111\u1ec3 gi\u1ea3m kh\u1ed1i l\u01b0\u1ee3ng t\u00ednh to\u00e1n trong PHP &#8226; Ki\u1ebfn c\u00e0ng\" \/>\n<meta property=\"og:description\" content=\"Nghe h\u01a1i ngh\u1ecbch l\u00fd nh\u1ec9, nh\u01b0ng n\u1ebfu b\u1ea1n t\u1eebng thao t\u00e1c v\u1edbi kh\u1ed1i d\u1eef li\u1ec7u l\u1edbn b\u1ea1n s\u1ebd s\u1edbm c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. 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