{"id":476513,"date":"2023-08-09T07:29:55","date_gmt":"2023-08-09T07:29:55","guid":{"rendered":""},"modified":"2023-09-05T11:12:54","modified_gmt":"2023-09-05T11:12:54","slug":"csv","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/csv\/","title":{"rendered":"CSV"},"content":{"rendered":"<p>CSV, vi\u1ebft t\u1eaft c\u1ee7a Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y, l\u00e0 \u0111\u1ecbnh d\u1ea1ng t\u1ec7p v\u0103n b\u1ea3n thu\u1ea7n t\u00fay ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u d\u1ea1ng b\u1ea3ng. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i do t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh m\u1ed9t l\u1ef1a ch\u1ecdn linh ho\u1ea1t \u0111\u1ec3 bi\u1ec3u di\u1ec5n d\u1eef li\u1ec7u. T\u1ec7p CSV th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c t\u00e1c v\u1ee5 nh\u1eadp v\u00e0 xu\u1ea5t d\u1eef li\u1ec7u trong nhi\u1ec1u ng\u00e0nh, bao g\u1ed3m t\u00e0i ch\u00ednh, ti\u1ebfp th\u1ecb, nghi\u00ean c\u1ee9u v\u00e0 ph\u00e1t tri\u1ec3n web.<\/p>\n<h2>L\u1ecbch s\u1eed ngu\u1ed3n g\u1ed1c c\u1ee7a CSV v\u00e0 l\u1ea7n \u0111\u1ea7u ti\u00ean nh\u1eafc t\u1edbi n\u00f3<\/h2>\n<p>CSV c\u00f3 l\u1ecbch s\u1eed l\u00e2u \u0111\u1eddi k\u1ec3 t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u c\u1ee7a m\u00e1y t\u00ednh. \u0110\u1ecbnh d\u1ea1ng n\u00e0y \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u v\u00e0o nh\u1eefng n\u0103m 1970 nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a ph\u1ea7n m\u1ec1m b\u1ea3ng t\u00ednh \u0111\u1ea7u ti\u00ean, \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi Bob Frankston v\u00e0 Dan Bricklin. Tr\u01b0\u1edbc \u0111\u00f3, b\u1ea3ng t\u00ednh b\u1ecb gi\u1edbi h\u1ea1n b\u1edfi kh\u1ea3 n\u0103ng ph\u1ea7n c\u1ee9ng v\u00e0 CSV cung c\u1ea5p c\u00e1ch l\u01b0u tr\u1eef d\u1eef li\u1ec7u d\u1ea1ng b\u1ea3ng m\u1ed9t c\u00e1ch ng\u1eafn g\u1ecdn v\u00e0 d\u1ec5 \u0111\u1ecdc.<\/p>\n<p>Vi\u1ec7c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn CSV l\u1ea7n \u0111\u1ea7u ti\u00ean c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb RFC 41, m\u1ed9t t\u00e0i li\u1ec7u \u0111\u01b0\u1ee3c xu\u1ea5t b\u1ea3n n\u0103m 1973 b\u1edfi Randy D. Smith, m\u00f4 t\u1ea3 \u0111\u1ecbnh d\u1ea1ng trao \u0111\u1ed5i d\u1eef li\u1ec7u gi\u1eefa ph\u1ea7n m\u1ec1m HOSTS.TXT v\u00e0 IMP c\u1ee7a ARPANET. Vi\u1ec7c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i CSV b\u1eaft \u0111\u1ea7u t\u1eeb nh\u1eefng n\u0103m 1980 v\u00ec n\u00f3 cung c\u1ea5p m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u gi\u1eefa m\u00e1y t\u00ednh l\u1edbn v\u00e0 m\u00e1y t\u00ednh mini.<\/p>\n<h2>Th\u00f4ng tin chi ti\u1ebft v\u1ec1 CSV. M\u1edf r\u1ed9ng ch\u1ee7 \u0111\u1ec1 CSV<\/h2>\n<p>CSV l\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n t\u00fay, trong \u0111\u00f3 m\u1ed7i d\u00f2ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t h\u00e0ng d\u1eef li\u1ec7u v\u00e0 m\u1ed7i tr\u01b0\u1eddng trong h\u00e0ng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u00e2n c\u00e1ch, th\u01b0\u1eddng l\u00e0 d\u1ea5u ph\u1ea9y (<code data-no-translation=\"\">,<\/code>), m\u1eb7c d\u00f9 c\u00e1c d\u1ea5u ph\u00e2n c\u00e1ch kh\u00e1c nh\u01b0 d\u1ea5u ch\u1ea5m ph\u1ea9y ho\u1eb7c tab c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Vi\u1ec7c thi\u1ebfu d\u1ea5u ph\u00e2n c\u00e1ch ti\u00eau chu\u1ea9n \u0111\u00e3 d\u1eabn \u0111\u1ebfn c\u00e1c bi\u1ebfn th\u1ec3 nh\u01b0 TSV (Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng tab) v\u00e0 SSV (Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ch\u1ea5m ph\u1ea9y).<\/p>\n<h3>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a CSV. C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a CSV<\/h3>\n<p>C\u00e1c t\u1ec7p CSV \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp d\u01b0\u1edbi d\u1ea1ng b\u1ea3ng, trong \u0111\u00f3 m\u1ed7i d\u00f2ng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t b\u1ea3n ghi (h\u00e0ng) v\u00e0 m\u1ed7i tr\u01b0\u1eddng (c\u1ed9t) \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u00e2n c\u00e1ch. D\u00f2ng \u0111\u1ea7u ti\u00ean th\u01b0\u1eddng ch\u1ee9a ti\u00eau \u0111\u1ec1, x\u00e1c \u0111\u1ecbnh t\u00ean c\u1ee7a t\u1eebng c\u1ed9t. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 v\u00ed d\u1ee5 v\u1ec1 t\u1ec7p CSV \u0111\u01a1n gi\u1ea3n:<\/p>\n<pre><div class=\"bg-black rounded-md mb-4\"><div class=\"flex items-center relative text-gray-200 bg-gray-800 px-4 py-2 text-xs font-sans justify-between rounded-t-md\"><span>\u0111\u1ed3 th\u1ecb<\/span><button class=\"flex ml-auto gap-2\"><svg stroke=\"currentColor\" fill=\"none\" stroke-width=\"2\" viewbox=\"0 0 24 24\" stroke-linecap=\"round\" stroke-linejoin=\"round\" class=\"h-4 w-4\" height=\"1em\" width=\"1em\" ><path d=\"M16 4h2a2 2 0 0 1 2 2v14a2 2 0 0 1-2 2H6a2 2 0 0 1-2-2V6a2 2 0 0 1 2-2h2\"><\/path><rect x=\"8\" y=\"2\" width=\"8\" height=\"4\" rx=\"1\" ry=\"1\"><\/rect><\/svg>Sao ch\u00e9p m\u00e3<\/button><\/div><div class=\"p-4 overflow-y-auto\"><code class=\"!whitespace-pre hljs language-graphql\" data-no-translation=\"\">Name, Age, Email\nJohn Doe, <span class=\"hljs-number\">30<\/span>, john.doe<span class=\"hljs-meta\">@example<\/span>.com\nJane Smith, <span class=\"hljs-number\">25<\/span>, jane.smith<span class=\"hljs-meta\">@example<\/span>.com\n<\/code><\/div><\/div><\/pre>\n<p>Trong v\u00ed d\u1ee5 n\u00e0y, ti\u00eau \u0111\u1ec1 l\u00e0 \u201cT\u00ean\u201d, \u201cTu\u1ed5i\u201d v\u00e0 \u201cEmail\u201d v\u00e0 m\u1ed7i d\u00f2ng th\u1ec3 hi\u1ec7n th\u00f4ng tin c\u1ee7a m\u1ed9t ng\u01b0\u1eddi.<\/p>\n<h3>Ph\u00e2n t\u00edch c\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a CSV<\/h3>\n<p>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a CSV l\u00e0 l\u00fd do khi\u1ebfn n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00e0 \u0111\u00e1nh gi\u00e1 cao nh\u01b0 v\u1eady:<\/p>\n<ol>\n<li>\n<p><strong>S\u1ef1 \u0111\u01a1n gi\u1ea3n<\/strong>: CSV r\u1ea5t d\u1ec5 hi\u1ec3u v\u00e0 d\u1ec5 t\u1ea1o, khi\u1ebfn n\u00f3 tr\u1edf th\u00e0nh \u0111\u1ecbnh d\u1ea1ng th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec3 trao \u0111\u1ed5i d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>N\u1ec1n t\u1ea3ng b\u1ea5t kh\u1ea3 tri<\/strong>: N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecdc v\u00e0 ghi b\u1edfi h\u1ea7u h\u1ebft m\u1ecdi \u1ee9ng d\u1ee5ng, b\u1ea5t k\u1ec3 h\u1ec7 \u0111i\u1ec1u h\u00e0nh ho\u1eb7c n\u1ec1n t\u1ea3ng.<\/p>\n<\/li>\n<li>\n<p><strong>Con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c<\/strong>: L\u00e0 \u0111\u1ecbnh d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n t\u00fay, CSV c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem v\u00e0 ch\u1ec9nh s\u1eeda b\u1eb1ng tr\u00ecnh so\u1ea1n th\u1ea3o v\u0103n b\u1ea3n \u0111\u01a1n gi\u1ea3n, gi\u00fap ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea7n m\u1ec1m chuy\u00ean d\u1ee5ng.<\/p>\n<\/li>\n<li>\n<p><strong>C\u1ea5u tr\u00fac d\u1ea1ng b\u1ea3ng<\/strong>: C\u1ea5u tr\u00fac gi\u1ed1ng b\u1ea3ng c\u1ee7a CSV cho ph\u00e9p n\u00f3 th\u1ec3 hi\u1ec7n d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>Nh\u1eb9<\/strong>: C\u00e1c t\u1ec7p CSV c\u00f3 k\u00edch th\u01b0\u1edbc t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf, khi\u1ebfn ch\u00fang tr\u1edf n\u00ean l\u00fd t\u01b0\u1edfng \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u qua internet.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c lo\u1ea1i CSV<\/h2>\n<p>T\u1ec7p CSV c\u00f3 th\u1ec3 c\u00f3 nh\u1eefng thay \u0111\u1ed5i nh\u1ecf trong c\u1ea5u tr\u00fac d\u1ef1a tr\u00ean d\u1ea5u ph\u00e2n c\u00e1ch v\u00e0 c\u00e1c l\u1ef1a ch\u1ecdn \u0111\u1ecbnh d\u1ea1ng kh\u00e1c. C\u00e1c lo\u1ea1i t\u1ec7p CSV ph\u1ed5 bi\u1ebfn nh\u1ea5t bao g\u1ed3m:<\/p>\n<ol>\n<li>\n<p><strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y (CSV)<\/strong>: \u0110\u1ecbnh d\u1ea1ng truy\u1ec1n th\u1ed1ng v\u00e0 ph\u1ed5 bi\u1ebfn nh\u1ea5t s\u1eed d\u1ee5ng d\u1ea5u ph\u1ea9y (<code data-no-translation=\"\">,<\/code>) l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng tab (TSV)<\/strong>: S\u1eed d\u1ee5ng k\u00fd t\u1ef1 tab (<code data-no-translation=\"\">t<\/code>) l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch, l\u00e0m cho n\u00f3 t\u01b0\u01a1ng th\u00edch v\u1edbi b\u1ea3ng t\u00ednh v\u00e0 tr\u00ecnh x\u1eed l\u00fd v\u0103n b\u1ea3n.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ch\u1ea5m ph\u1ea9y (SSV)<\/strong>: S\u1eed d\u1ee5ng d\u1ea5u ch\u1ea5m ph\u1ea9y (<code data-no-translation=\"\">;<\/code>) l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u1edf c\u00e1c n\u01b0\u1edbc Ch\u00e2u \u00c2u n\u01a1i d\u1ea5u ph\u1ea9y \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch th\u1eadp ph\u00e2n.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u00e1 tr\u1ecb ph\u00e2n t\u00e1ch b\u1eb1ng \u1ed1ng (PSV)<\/strong>: S\u1eed d\u1ee5ng thanh d\u1ecdc (<code data-no-translation=\"\">|<\/code>) l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch, ph\u1ed5 bi\u1ebfn trong m\u00f4i tr\u01b0\u1eddng Unix.<\/p>\n<\/li>\n<li>\n<p><strong>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u c\u00e1ch<\/strong>: C\u00e1c tr\u01b0\u1eddng \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u c\u00e1ch, th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho c\u00e1c t\u1eadp d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n h\u01a1n.<\/p>\n<\/li>\n<\/ol>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 b\u1ea3ng so s\u00e1nh c\u00e1c lo\u1ea1i CSV n\u00e0y:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>D\u1ea5u ph\u00e2n c\u00e1ch<\/th>\n<th>C\u00e1ch s\u1eed d\u1ee5ng chung<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CSV<\/td>\n<td>D\u1ea5u ph\u1ea9y (,)<\/td>\n<td>Trao \u0111\u1ed5i d\u1eef li\u1ec7u chung<\/td>\n<\/tr>\n<tr>\n<td>TSV<\/td>\n<td>Tab (t)<\/td>\n<td>B\u1ea3ng t\u00ednh, b\u1ed9 x\u1eed l\u00fd v\u0103n b\u1ea3n<\/td>\n<\/tr>\n<tr>\n<td>SSV<\/td>\n<td>D\u1ea5u ch\u1ea5m ph\u1ea9y (;)<\/td>\n<td>\u0111\u1ecba ph\u01b0\u01a1ng ch\u00e2u \u00c2u<\/td>\n<\/tr>\n<tr>\n<td>PSV<\/td>\n<td>\u0110\u01b0\u1eddng \u1ed1ng (<\/td>\n<td>)<\/td>\n<\/tr>\n<tr>\n<td>Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u c\u00e1ch<\/td>\n<td>Kh\u00f4ng gian ( )<\/td>\n<td>B\u1ed9 d\u1eef li\u1ec7u \u0111\u01a1n gi\u1ea3n h\u01a1n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng CSV, c\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng<\/h2>\n<p>T\u1ec7p CSV t\u00ecm th\u1ea5y nhi\u1ec1u \u1ee9ng d\u1ee5ng trong c\u00e1c t\u00e1c v\u1ee5 li\u00ean quan \u0111\u1ebfn d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/p>\n<ol>\n<li>\n<p><strong>Nh\u1eadp\/Xu\u1ea5t d\u1eef li\u1ec7u<\/strong>: Nhi\u1ec1u \u1ee9ng d\u1ee5ng ph\u1ea7n m\u1ec1m v\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3 CSV \u0111\u1ec3 nh\u1eadp v\u00e0 xu\u1ea5t d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>Sao l\u01b0u d\u1eef li\u1ec7u<\/strong>: T\u1ec7p CSV c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o b\u1ea3n sao l\u01b0u d\u1eef li\u1ec7u quan tr\u1ecdng \u1edf \u0111\u1ecbnh d\u1ea1ng m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/strong>: C\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u v\u00e0 ph\u00e2n t\u00edch th\u01b0\u1eddng s\u1eed d\u1ee5ng CSV \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 tr\u1ef1c quan h\u00f3a d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ol>\n<p>Tuy nhi\u00ean, CSV kh\u00f4ng ph\u1ea3i l\u00e0 kh\u00f4ng c\u00f3 th\u00e1ch th\u1ee9c:<\/p>\n<ol>\n<li>\n<p><strong>To\u00e0n v\u1eb9n d\u1eef li\u1ec7u<\/strong>: CSV kh\u00f4ng h\u1ed7 tr\u1ee3 c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p nh\u01b0 h\u00ecnh \u1ea3nh ho\u1eb7c c\u1ea5u tr\u00fac l\u1ed3ng nhau, h\u1ea1n ch\u1ebf vi\u1ec7c s\u1eed d\u1ee5ng n\u00f3 cho m\u1ed9t s\u1ed1 \u0111\u1ecbnh d\u1ea1ng d\u1eef li\u1ec7u nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<\/li>\n<li>\n<p><strong>Ph\u00e2n t\u00edch d\u1eef li\u1ec7u<\/strong>: Vi\u1ec7c x\u1eed l\u00fd c\u00e1c k\u00fd t\u1ef1 \u0111\u1eb7c bi\u1ec7t (v\u00ed d\u1ee5: ng\u1eaft d\u00f2ng, d\u1ea5u ph\u00e2n c\u00e1ch trong c\u00e1c gi\u00e1 tr\u1ecb) c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 ph\u00e2n t\u00edch c\u00fa ph\u00e1p.<\/p>\n<\/li>\n<li>\n<p><strong>Thi\u1ebfu ti\u00eau chu\u1ea9n<\/strong>: Vi\u1ec7c thi\u1ebfu m\u1ed9t ti\u00eau chu\u1ea9n nghi\u00eam ng\u1eb7t c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn s\u1ef1 kh\u00e1c bi\u1ec7t, d\u1eabn \u0111\u1ebfn c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 t\u00ednh t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c nhau.<\/p>\n<\/li>\n<\/ol>\n<p>\u0110\u1ec3 gi\u1ea3m thi\u1ec3u nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y, c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t v\u00e0 th\u01b0 vi\u1ec7n ph\u00e2n t\u00edch c\u00fa ph\u00e1p CSV kh\u00e1c nhau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o x\u1eed l\u00fd d\u1eef li\u1ec7u th\u00edch h\u1ee3p v\u00e0 duy tr\u00ec t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n<h2>C\u00e1c \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh v\u00e0 so s\u00e1nh kh\u00e1c v\u1edbi c\u00e1c thu\u1eadt ng\u1eef t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>H\u00e3y so s\u00e1nh CSV v\u1edbi c\u00e1c \u0111\u1ecbnh d\u1ea1ng t\u1ec7p ph\u1ed5 bi\u1ebfn kh\u00e1c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 trao \u0111\u1ed5i d\u1eef li\u1ec7u:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u0110\u1ecbnh d\u1ea1ng<\/th>\n<th>\u0110\u1eb7c tr\u01b0ng<\/th>\n<th>\u01afu \u0111i\u1ec3m<\/th>\n<th>Nh\u01b0\u1ee3c \u0111i\u1ec3m<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>CSV<\/td>\n<td>V\u0103n b\u1ea3n thu\u1ea7n t\u00fay, c\u1ea5u tr\u00fac d\u1ea1ng b\u1ea3ng<\/td>\n<td>\u0110\u01a1n gi\u1ea3n, d\u1ec5 \u0111\u1ecdc, \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i<\/td>\n<td>Lo\u1ea1i d\u1eef li\u1ec7u h\u1ea1n ch\u1ebf, kh\u00f4ng c\u00f3 ti\u00eau chu\u1ea9n<\/td>\n<\/tr>\n<tr>\n<td>JSON<\/td>\n<td>D\u1eef li\u1ec7u ph\u00e2n c\u1ea5p, con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c<\/td>\n<td>H\u1ed7 tr\u1ee3 d\u1eef li\u1ec7u l\u1ed3ng nhau, t\u1ef1 m\u00f4 t\u1ea3<\/td>\n<td>K\u00edch th\u01b0\u1edbc t\u1ec7p l\u1edbn h\u01a1n, kh\u00f4ng \u0111\u01a1n gi\u1ea3n nh\u01b0 CSV<\/td>\n<\/tr>\n<tr>\n<td>XML<\/td>\n<td>Ph\u00e2n c\u1ea5p, t\u1ef1 m\u00f4 t\u1ea3<\/td>\n<td>H\u1ed7 tr\u1ee3 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u, h\u1ed7 tr\u1ee3 r\u1ed9ng r\u00e3i<\/td>\n<td>D\u00e0i d\u00f2ng, k\u00edch th\u01b0\u1edbc t\u1ec7p l\u1edbn h\u01a1n<\/td>\n<\/tr>\n<tr>\n<td>Excel<\/td>\n<td>Ph\u00e2n c\u1ea5p, \u0111\u1ecbnh d\u1ea1ng phong ph\u00fa, c\u00f4ng th\u1ee9c<\/td>\n<td>H\u1ed7 tr\u1ee3 d\u1eef li\u1ec7u v\u00e0 t\u00ednh to\u00e1n ph\u1ee9c t\u1ea1p<\/td>\n<td>\u0110\u1ed9c quy\u1ec1n, kh\u00f4ng l\u00fd t\u01b0\u1edfng cho c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn CSV<\/h2>\n<p>M\u1eb7c d\u00f9 CSV v\u1eabn l\u00e0 \u0111\u1ecbnh d\u1ea1ng c\u01a1 b\u1ea3n \u0111\u1ec3 trao \u0111\u1ed5i d\u1eef li\u1ec7u nh\u01b0ng c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng n\u00f3 trong t\u01b0\u01a1ng lai. V\u00ed d\u1ee5:<\/p>\n<ol>\n<li>\n<p><strong>D\u1eef li\u1ec7u l\u1edbn<\/strong>: Khi c\u00e1c t\u1eadp d\u1eef li\u1ec7u t\u0103ng v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p, CSV c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i nh\u1eefng th\u00e1ch th\u1ee9c trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>API v\u00e0 JSON<\/strong>: API ng\u00e0y c\u00e0ng s\u1eed d\u1ee5ng JSON \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u do t\u00ednh linh ho\u1ea1t v\u00e0 d\u1ec5 ph\u00e2n t\u00edch c\u00fa ph\u00e1p c\u1ee7a n\u00f3.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110\u1ecbnh d\u1ea1ng tu\u1ea7n t\u1ef1 h\u00f3a d\u1eef li\u1ec7u<\/strong>: B\u1ed9 \u0111\u1ec7m giao th\u1ee9c v\u00e0 Apache Avro \u0111ang tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn \u0111\u1ec3 tu\u1ea7n t\u1ef1 h\u00f3a d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<\/ol>\n<p>Tuy nhi\u00ean, do t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng r\u1ed9ng r\u00e3i, CSV c\u00f3 th\u1ec3 v\u1eabn ph\u00f9 h\u1ee3p trong th\u1eddi gian d\u00e0i, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c t\u1eadp d\u1eef li\u1ec7u nh\u1ecf h\u01a1n v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng t\u00e1c v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng c\u0169.<\/p>\n<h2>C\u00e1ch s\u1eed d\u1ee5ng ho\u1eb7c li\u00ean k\u1ebft m\u00e1y ch\u1ee7 proxy v\u1edbi CSV<\/h2>\n<p>C\u00e1c m\u00e1y ch\u1ee7 proxy, gi\u1ed1ng nh\u01b0 c\u00e1c m\u00e1y ch\u1ee7 do OneProxy (oneproxy.pro) cung c\u1ea5p, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi CSV theo nhi\u1ec1u c\u00e1ch kh\u00e1c nhau:<\/p>\n<ol>\n<li>\n<p><strong>Qu\u00e9t d\u1eef li\u1ec7u<\/strong>: M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 cho ph\u00e9p qu\u00e9t d\u1eef li\u1ec7u CSV t\u1eeb c\u00e1c trang web, \u0111\u1ea3m b\u1ea3o t\u00ednh \u1ea9n danh v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c l\u1ec7nh c\u1ea5m IP.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u<\/strong>: Proxy cho ph\u00e9p t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n m\u00e0 kh\u00f4ng ti\u1ebft l\u1ed9 \u0111\u1ecba ch\u1ec9 IP ngu\u1ed3n ban \u0111\u1ea7u.<\/p>\n<\/li>\n<li>\n<p><strong>X\u00e1c minh d\u1eef li\u1ec7u<\/strong>: Proxy c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 x\u00e1c th\u1ef1c d\u1eef li\u1ec7u CSV b\u1eb1ng c\u00e1ch th\u1ef1c hi\u1ec7n y\u00eau c\u1ea7u th\u00f4ng qua c\u00e1c \u0111\u1ecba ch\u1ec9 IP kh\u00e1c nhau.<\/p>\n<\/li>\n<li>\n<p><strong>Nh\u1eafm m\u1ee5c ti\u00eau theo \u0111\u1ecba l\u00fd<\/strong>: Proxy cho ph\u00e9p truy xu\u1ea5t d\u1eef li\u1ec7u CSV t\u1eeb c\u00e1c v\u1ecb tr\u00ed \u0111\u1ecba l\u00fd kh\u00e1c nhau, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n thu\u1eadn l\u1ee3i cho vi\u1ec7c ph\u00e2n t\u00edch d\u1eef li\u1ec7u theo v\u1ecb tr\u00ed c\u1ee5 th\u1ec3.<\/p>\n<\/li>\n<\/ol>\n<p>Proxy \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c thu th\u1eadp d\u1eef li\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh trao \u0111\u1ed5i d\u1eef li\u1ec7u su\u00f4n s\u1ebb khi x\u1eed l\u00fd c\u00e1c t\u1ec7p CSV tr\u00ean web.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 CSV, h\u00e3y xem x\u00e9t vi\u1ec7c ki\u1ec3m tra c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Comma-separated_values\" target=\"_new\" rel=\"noopener nofollow\">\u0110\u1ecbnh d\u1ea1ng t\u1ec7p CSV \u2013 Wikipedia<\/a><\/li>\n<li><a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc41\" target=\"_new\" rel=\"noopener nofollow\">RFC 41 \u2013 Danh s\u00e1ch g\u1eedi th\u01b0 c\u1ee7a m\u1ea1ng ARPA<\/a><\/li>\n<li><a href=\"https:\/\/www.ionos.com\/digitalguide\/server\/know-how\/csv-vs-json-vs-xml-which-is-the-best-data-interchange-format\/\" target=\"_new\" rel=\"noopener nofollow\">CSV, JSON v\u00e0 XML \u2013 \u0110\u1ecbnh d\u1ea1ng n\u00e0o t\u1ed1t nh\u1ea5t \u0111\u1ec3 trao \u0111\u1ed5i d\u1eef li\u1ec7u?<\/a><\/li>\n<\/ul>","protected":false},"featured_media":468056,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476513","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>CSV: Comma-Separated Values<\/mark>","faq_items":[{"question":"What is CSV (Comma-Separated Values)?","answer":"<p>CSV, which stands for Comma-Separated Values, is a widely used plain-text file format for storing tabular data. Each line represents a row, and each field within the row is separated by a delimiter, usually a comma. It is commonly used for data import\/export tasks in various industries.<\/p>"},{"question":"How did CSV originate, and when was it first mentioned?","answer":"<p>CSV has its roots in the 1970s when it was introduced as part of the first spreadsheet software by Bob Frankston and Dan Bricklin. The first mention of CSV can be traced back to RFC 41 in 1973, which described the format for data interchange between ARPANET's HOSTS.TXT and IMP software.<\/p>"},{"question":"What are the key features of CSV?","answer":"<p>CSV offers several key features that make it popular, including simplicity, platform-agnostic nature, human-readability, tabular structure, and being lightweight for easy data exchange.<\/p>"},{"question":"How does CSV work internally?","answer":"<p>CSV files are organized as tables, with each line representing a record (row) and each field (column) separated by a delimiter. The first line often contains headers that define the column names.<\/p>"},{"question":"What types of CSV exist?","answer":"<p>There are various types of CSV files based on the delimiter used. The most common types include Comma-Separated Values (CSV), Tab-Separated Values (TSV), Semicolon-Separated Values (SSV), Pipe-Separated Values (PSV), and Space-Separated Values.<\/p>"},{"question":"What are the challenges associated with CSV usage?","answer":"<p>Some challenges with CSV usage include data integrity issues with special characters, limitations in handling complex data types, and the absence of strict standards leading to compatibility problems.<\/p>"},{"question":"How can CSV be used, and what are the solutions to related problems?","answer":"<p>CSV finds application in data import\/export, data backup, and data analysis. To mitigate potential problems, best practices and CSV parsing libraries can be employed.<\/p>"},{"question":"What are the future perspectives related to CSV?","answer":"<p>While emerging technologies like Big Data and JSON may influence data formats, CSV's simplicity and widespread adoption suggest it will remain relevant, especially for smaller datasets and interoperability with legacy systems.<\/p>"},{"question":"How can proxy servers be associated with CSV?","answer":"<p>Proxy servers, like OneProxy, can enhance CSV-related tasks by enabling web scraping, data aggregation, verification, and geo-targeting for location-specific data analysis.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476513\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468056"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}