{"id":476718,"date":"2023-08-09T07:35:16","date_gmt":"2023-08-09T07:35:16","guid":{"rendered":""},"modified":"2023-09-05T11:13:18","modified_gmt":"2023-09-05T11:13:18","slug":"data-transformation","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/data-transformation\/","title":{"rendered":"Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u"},"content":{"rendered":"<p>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh bao g\u1ed3m chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u t\u1eeb \u0111\u1ecbnh d\u1ea1ng ho\u1eb7c c\u1ea5u tr\u00fac n\u00e0y sang \u0111\u1ecbnh d\u1ea1ng ho\u1eb7c c\u1ea5u tr\u00fac kh\u00e1c. Th\u1ef1c h\u00e0nh n\u00e0y l\u00e0 m\u1ed9t ph\u1ea7n quan tr\u1ecdng c\u1ee7a qu\u1ea3n l\u00fd d\u1eef li\u1ec7u v\u00e0 th\u01b0\u1eddng x\u1ea3y ra trong qu\u00e1 tr\u00ecnh t\u00edch h\u1ee3p d\u1eef li\u1ec7u, di chuy\u1ec3n d\u1eef li\u1ec7u, l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0 c\u00e1c t\u00e1c v\u1ee5 x\u1eed l\u00fd d\u1eef li\u1ec7u kh\u00e1c nhau. M\u1ee5c \u0111\u00edch ch\u00ednh c\u1ee7a n\u00f3 l\u00e0 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u, kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch v\u00e0 t\u00ednh h\u1eefu \u00edch cho c\u00e1c \u1ee9ng d\u1ee5ng kh\u00e1c nhau, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong b\u1ed1i c\u1ea3nh ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n<h2>B\u1ed1i c\u1ea3nh l\u1ecbch s\u1eed c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>Ngu\u1ed3n g\u1ed1c c\u1ee7a vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 b\u1eaft ngu\u1ed3n t\u1eeb s\u1ef1 ra \u0111\u1eddi c\u1ee7a m\u00e1y t\u00ednh v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u s\u1ed1. Tuy nhi\u00ean, kh\u00e1i ni\u1ec7m n\u00e0y \u0111\u00e3 tr\u1edf n\u00ean n\u1ed5i b\u1eadt v\u00e0o nh\u1eefng n\u0103m 1970, sau s\u1ef1 n\u1ed5i l\u00ean c\u1ee7a h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS). L\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u1ec1 c\u1eadp \u0111\u1ebfn chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u, theo c\u00e1ch hi\u1ec3u hi\u1ec7n t\u1ea1i, xu\u1ea5t hi\u1ec7n trong l\u0129nh v\u1ef1c quy tr\u00ecnh Tr\u00edch xu\u1ea5t, Chuy\u1ec3n \u0111\u1ed5i, T\u1ea3i (ETL), v\u1ed1n r\u1ea5t quan tr\u1ecdng trong vi\u1ec7c di chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u1eadn h\u00e0nh sang c\u01a1 s\u1edf d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh.<\/p>\n<h2>Hi\u1ec3u v\u1ec1 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u bao g\u1ed3m m\u1ed9t s\u1ed1 ho\u1ea1t \u0111\u1ed9ng. V\u1ec1 c\u1ed1t l\u00f5i, n\u00f3 s\u1eeda \u0111\u1ed5i d\u1eef li\u1ec7u th\u00e0nh d\u1ea1ng th\u00edch h\u1ee3p \u0111\u1ec3 ph\u00e2n t\u00edch ho\u1eb7c x\u1eed l\u00fd th\u00eam. C\u00e1c b\u01b0\u1edbc li\u00ean quan \u0111\u1ebfn quy tr\u00ecnh n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u (lo\u1ea1i b\u1ecf l\u1ed7i ho\u1eb7c s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n), t\u1ed5ng h\u1ee3p (t\u00f3m t\u1eaft ho\u1eb7c nh\u00f3m d\u1eef li\u1ec7u) v\u00e0 chu\u1ea9n h\u00f3a (s\u1eeda \u0111\u1ed5i quy m\u00f4 d\u1eef li\u1ec7u).<\/p>\n<p>B\u1ea3n ch\u1ea5t ch\u00ednh x\u00e1c c\u1ee7a vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i ph\u1ee5 thu\u1ed9c v\u00e0o \u1ee9ng d\u1ee5ng v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a c\u1ea3 d\u1eef li\u1ec7u ngu\u1ed3n v\u00e0 d\u1eef li\u1ec7u \u0111\u00edch. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, n\u00f3 c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i \u0111\u01a1n gi\u1ea3n gi\u1eefa c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 chuy\u1ec3n s\u1ed1 nguy\u00ean th\u00e0nh s\u1ed1 th\u1ef1c. Trong c\u00e1c t\u00ecnh hu\u1ed1ng kh\u00e1c, n\u00f3 c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn c\u00e1c th\u1ee7 t\u1ee5c ph\u1ee9c t\u1ea1p nh\u01b0 khai th\u00e1c v\u0103n b\u1ea3n ho\u1eb7c ph\u00e2n t\u00edch c\u1ea3m x\u00fac.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>Ho\u1ea1t \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u ph\u1ee5 thu\u1ed9c v\u00e0o chi ti\u1ebft c\u1ee5 th\u1ec3 c\u1ee7a d\u1eef li\u1ec7u v\u00e0 c\u00e1c c\u00f4ng c\u1ee5 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. N\u00f3i chung, quy tr\u00ecnh n\u00e0y \u0111\u01b0\u1ee3c t\u1ef1 \u0111\u1ed9ng h\u00f3a b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng t\u1eadp l\u1ec7nh ho\u1eb7c c\u00f4ng c\u1ee5 ph\u1ea7n m\u1ec1m v\u00e0 tu\u00e2n theo tr\u00ecnh t\u1ef1 c\u00e1c b\u01b0\u1edbc:<\/p>\n<ol>\n<li><strong>Kh\u00e1m ph\u00e1 d\u1eef li\u1ec7u:<\/strong> \u0110i\u1ec1u n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c hi\u1ec3u c\u1ea5u tr\u00fac, \u0111\u1ecbnh d\u1ea1ng v\u00e0 ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a d\u1eef li\u1ec7u ngu\u1ed3n.<\/li>\n<li><strong>\u00c1nh x\u1ea1 d\u1eef li\u1ec7u:<\/strong> B\u01b0\u1edbc n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c x\u00e1c \u0111\u1ecbnh c\u00e1ch c\u00e1c tr\u01b0\u1eddng ho\u1eb7c thu\u1ed9c t\u00ednh ri\u00eang l\u1ebb c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i ho\u1eb7c \u00e1nh x\u1ea1 t\u1eeb ngu\u1ed3n t\u1edbi \u0111\u00edch.<\/li>\n<li><strong>T\u1ea1o m\u00e3:<\/strong> Logic chuy\u1ec3n \u0111\u1ed5i \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh trong \u00e1nh x\u1ea1 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o c\u00e1c t\u1eadp l\u1ec7nh ho\u1eb7c h\u01b0\u1edbng d\u1eabn th\u1ef1c thi.<\/li>\n<li><strong>Ch\u1ea5p h\u00e0nh:<\/strong> M\u00e3 \u0111\u01b0\u1ee3c t\u1ea1o s\u1ebd \u0111\u01b0\u1ee3c ch\u1ea1y, \u00e1p d\u1ee5ng c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i cho d\u1eef li\u1ec7u.<\/li>\n<li><strong>Xem x\u00e9t v\u00e0 s\u1eeda \u0111\u1ed5i:<\/strong> D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i \u0111\u01b0\u1ee3c ki\u1ec3m tra v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 \u0111\u1ed9 ch\u00ednh x\u00e1c, \u0111\u1ed3ng th\u1eddi \u0111i\u1ec1u ch\u1ec9nh qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i n\u1ebfu c\u1ea7n.<\/li>\n<\/ol>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<ul>\n<li><strong>D\u1ecdn d\u1eb9p d\u1eef li\u1ec7u:<\/strong> Lo\u1ea1i b\u1ecf s\u1ef1 kh\u00f4ng nh\u1ea5t qu\u00e1n, tr\u00f9ng l\u1eb7p ho\u1eb7c l\u1ed7i \u0111\u1ec3 c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u.<\/li>\n<li><strong>Chu\u1ea9n h\u00f3a d\u1eef li\u1ec7u:<\/strong> \u0110\u01b0a d\u1eef li\u1ec7u \u0111a d\u1ea1ng th\u00e0nh m\u1ed9t d\u1ea1ng th\u1ed1ng nh\u1ea5t, chu\u1ea9n m\u1ef1c \u0111\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n t\u01b0\u01a1ng th\u00edch v\u00e0 t\u00edch h\u1ee3p.<\/li>\n<li><strong>T\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u:<\/strong> T\u00f3m t\u1eaft ho\u1eb7c nh\u00f3m d\u1eef li\u1ec7u \u0111\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n cho vi\u1ec7c ph\u00e2n t\u00edch v\u00e0 b\u00e1o c\u00e1o.<\/li>\n<li><strong>L\u00e0m gi\u00e0u d\u1eef li\u1ec7u:<\/strong> T\u0103ng c\u01b0\u1eddng d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch th\u00eam th\u00f4ng tin li\u00ean quan, c\u1ea3i thi\u1ec7n b\u1ed1i c\u1ea3nh v\u00e0 t\u00ednh \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a n\u00f3.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>C\u00f3 nhi\u1ec1u lo\u1ea1i chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u kh\u00e1c nhau, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c d\u1ef1a tr\u00ean m\u1ee9c \u0111\u1ed9 ph\u1ee9c t\u1ea1p v\u00e0 t\u00ednh ch\u1ea5t c\u1ee7a nh\u1eefng thay \u0111\u1ed5i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u:<\/p>\n<table>\n<thead>\n<tr>\n<th>Ki\u1ec3u<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Bi\u1ebfn \u0111\u1ed5i \u0111\u01a1n gi\u1ea3n<\/td>\n<td>Li\u00ean quan \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i c\u01a1 b\u1ea3n \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u nh\u01b0 \u0111\u1ed5i t\u00ean tr\u01b0\u1eddng, thay \u0111\u1ed5i lo\u1ea1i d\u1eef li\u1ec7u ho\u1eb7c s\u1eeda \u0111\u1ed5i chu\u1ed7i v\u0103n b\u1ea3n.<\/td>\n<\/tr>\n<tr>\n<td>L\u00e0m s\u1ea1ch chuy\u1ec3n \u0111\u1ed5i<\/td>\n<td>Li\u00ean quan \u0111\u1ebfn vi\u1ec7c c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 lo\u1ea1i b\u1ecf d\u1eef li\u1ec7u tr\u00f9ng l\u1eb7p ho\u1eb7c kh\u00f4ng nh\u1ea5t qu\u00e1n.<\/td>\n<\/tr>\n<tr>\n<td>Chuy\u1ec3n \u0111\u1ed5i h\u1ed9i nh\u1eadp<\/td>\n<td>Li\u00ean quan \u0111\u1ebfn vi\u1ec7c k\u1ebft h\u1ee3p d\u1eef li\u1ec7u t\u1eeb c\u00e1c ngu\u1ed3n ho\u1eb7c l\u0129nh v\u1ef1c kh\u00e1c nhau.<\/td>\n<\/tr>\n<tr>\n<td>Bi\u1ebfn \u0111\u1ed5i n\u00e2ng cao<\/td>\n<td>Li\u00ean quan \u0111\u1ebfn nh\u1eefng thay \u0111\u1ed5i ph\u1ee9c t\u1ea1p \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 khai th\u00e1c v\u0103n b\u1ea3n ho\u1eb7c ph\u00e2n t\u00edch c\u1ea3m x\u00fac.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u1ee8ng d\u1ee5ng v\u00e0 th\u00e1ch th\u1ee9c c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c kh\u00e1c nhau nh\u01b0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, t\u00edch h\u1ee3p d\u1eef li\u1ec7u, h\u1ecdc m\u00e1y v\u00e0 kinh doanh th\u00f4ng minh. Trong m\u1ed7i l\u0129nh v\u1ef1c n\u00e0y, n\u00f3 gi\u00fap chu\u1ea9n b\u1ecb d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00e2n t\u00edch, b\u00e1o c\u00e1o v\u00e0 ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n<p>Tuy nhi\u00ean, qu\u00e1 tr\u00ecnh n\u00e0y kh\u00f4ng ph\u1ea3i l\u00e0 kh\u00f4ng c\u00f3 th\u00e1ch th\u1ee9c. Vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u00f2i h\u1ecfi ph\u1ea3i l\u1eadp k\u1ebf ho\u1ea1ch v\u00e0 th\u1ef1c hi\u1ec7n c\u1ea9n th\u1eadn, v\u00ec vi\u1ec7c chuy\u1ec3n \u0111\u1ed5i kh\u00f4ng ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c ho\u1eb7c m\u1ea5t d\u1eef li\u1ec7u. Ngo\u00e0i ra, c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i c\u00f3 th\u1ec3 t\u1ed1n th\u1eddi gian v\u00e0 t\u1ed1n k\u00e9m v\u1ec1 m\u1eb7t t\u00ednh to\u00e1n, \u0111\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c t\u1eadp d\u1eef li\u1ec7u l\u1edbn. Gi\u1ea3i ph\u00e1p cho nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y th\u01b0\u1eddng li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd, l\u1eadp k\u1ebf ho\u1ea1ch ph\u00f9 h\u1ee3p c\u0169ng nh\u01b0 th\u1eed nghi\u1ec7m l\u1eb7p l\u1ea1i v\u00e0 s\u1eeda \u0111\u1ed5i c\u00e1c quy tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i.<\/p>\n<h2>So s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m<\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 so s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u so v\u1edbi c\u00e1c kh\u00e1i ni\u1ec7m li\u00ean quan:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u00dd t\u01b0\u1edfng<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<th>M\u1ed1i quan h\u1ec7 v\u1edbi chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>T\u00edch h\u1ee3p d\u1eef li\u1ec7u<\/td>\n<td>K\u1ebft h\u1ee3p d\u1eef li\u1ec7u t\u1eeb c\u00e1c ngu\u1ed3n kh\u00e1c nhau v\u00e0o m\u1ed9t kho d\u1eef li\u1ec7u m\u1ea1ch l\u1ea1c<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u l\u00e0 m\u1ed9t b\u01b0\u1edbc quan tr\u1ecdng trong t\u00edch h\u1ee3p d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch gi\u1eefa c\u00e1c ngu\u1ed3n d\u1eef li\u1ec7u \u0111a d\u1ea1ng.<\/td>\n<\/tr>\n<tr>\n<td>ETL (Tr\u00edch xu\u1ea5t, chuy\u1ec3n \u0111\u1ed5i, t\u1ea3i)<\/td>\n<td>M\u1ed9t quy tr\u00ecnh \u0111\u01b0\u1eddng \u1ed1ng d\u1eef li\u1ec7u \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u l\u00e0 ch\u1eef \u201cT\u201d trong ETL, chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t \u0111\u1ec3 t\u1ea3i v\u00e0o kho d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n<tr>\n<td>L\u00e0m s\u1ea1ch d\u1eef li\u1ec7u<\/td>\n<td>Qu\u00e1 tr\u00ecnh ph\u00e1t hi\u1ec7n v\u00e0 s\u1eeda ch\u1eefa h\u1ed3 s\u01a1 b\u1ecb sai l\u1ec7ch ho\u1eb7c kh\u00f4ng ch\u00ednh x\u00e1c<\/td>\n<td>L\u00e0m s\u1ea1ch d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p con c\u1ee7a chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u.<\/td>\n<\/tr>\n<tr>\n<td>Di chuy\u1ec3n d\u1eef li\u1ec7u<\/td>\n<td>Qu\u00e1 tr\u00ecnh di chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb h\u1ec7 th\u1ed1ng n\u00e0y sang h\u1ec7 th\u1ed1ng kh\u00e1c<\/td>\n<td>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u01b0\u1eddng c\u1ea7n thi\u1ebft trong qu\u00e1 tr\u00ecnh di chuy\u1ec3n d\u1eef li\u1ec7u \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u1ea5u tr\u00fac c\u1ee7a h\u1ec7 th\u1ed1ng ngu\u1ed3n v\u00e0 \u0111\u00edch.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai<\/h2>\n<p>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u1eadm ch\u00ed c\u00f2n tr\u1edf n\u00ean quan tr\u1ecdng h\u01a1n trong t\u01b0\u01a1ng lai khi quy m\u00f4 v\u00e0 \u0111\u1ed9 ph\u1ee9c t\u1ea1p c\u1ee7a d\u1eef li\u1ec7u ti\u1ebfp t\u1ee5c t\u0103ng l\u00ean. C\u00e1c xu h\u01b0\u1edbng nh\u01b0 d\u1eef li\u1ec7u l\u1edbn v\u00e0 h\u1ecdc m\u00e1y \u0111\u00f2i h\u1ecfi d\u1eef li\u1ec7u c\u00f3 c\u1ea5u tr\u00fac t\u1ed1t, ch\u1ea5t l\u01b0\u1ee3ng cao, nh\u1ea5n m\u1ea1nh nhu c\u1ea7u chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3.<\/p>\n<p>H\u01a1n n\u1eefa, c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i nh\u01b0 tr\u00ed tu\u1ec7 nh\u00e2n t\u1ea1o (AI) v\u00e0 thu\u1eadt to\u00e1n h\u1ecdc m\u00e1y \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 t\u1ed1i \u01b0u h\u00f3a qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u. Nh\u1eefng c\u00f4ng ngh\u1ec7 n\u00e0y c\u00f3 th\u1ec3 x\u1eed l\u00fd c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i ph\u1ee9c t\u1ea1p h\u01a1n, c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng c\u1ee7a d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c chuy\u1ec3n \u0111\u1ed5i v\u00e0 gi\u1ea3m th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c c\u1ea7n thi\u1ebft.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 trong qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong b\u1ed1i c\u1ea3nh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u web ho\u1eb7c qu\u00e9t web. M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb m\u00e1y ch\u1ee7 web, cung c\u1ea5p m\u1ed9t l\u1edbp b\u1ed5 sung n\u01a1i c\u00e1c ho\u1ea1t \u0111\u1ed9ng chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n tr\u01b0\u1edbc khi d\u1eef li\u1ec7u \u0111\u1ebfn \u0111\u00edch cu\u1ed1i c\u00f9ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u, \u0111\u1ecbnh d\u1ea1ng l\u1ea1i d\u1eef li\u1ec7u ho\u1eb7c th\u1eadm ch\u00ed t\u0103ng c\u01b0\u1eddng th\u00f4ng tin b\u1ed5 sung. Do \u0111\u00f3, bi\u1ec7n ph\u00e1p n\u00e0y c\u00f3 th\u1ec3 gi\u00fap \u0111\u1ea3m b\u1ea3o quy\u1ec1n ri\u00eang t\u01b0 v\u00e0 b\u1ea3o m\u1eadt d\u1eef li\u1ec7u, \u0111\u1eb7c bi\u1ec7t trong tr\u01b0\u1eddng h\u1ee3p proxy \u1ea9n danh ho\u1eb7c proxy lu\u00e2n phi\u00ean do c\u00e1c c\u00f4ng ty nh\u01b0 OneProxy cung c\u1ea5p.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<ul>\n<li><a href=\"https:\/\/docs.microsoft.com\/en-us\/sql\/integration-services\/data-flow\/transformations\/data-flow-transformations?view=sql-server-ver15\" target=\"_new\" rel=\"noopener nofollow\">D\u1ecbch v\u1ee5 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u trong SQL Server<\/a><\/li>\n<li><a href=\"https:\/\/www.datamation.com\/big-data\/data-transformation-tools.html\" target=\"_new\" rel=\"noopener nofollow\">C\u00f4ng c\u1ee5 v\u00e0 k\u1ef9 thu\u1eadt chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"https:\/\/towardsdatascience.com\/data-preprocessing-concepts-fa946d11c825\" target=\"_new\" rel=\"noopener nofollow\">Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u trong h\u1ecdc m\u00e1y<\/a><\/li>\n<\/ul>","protected":false},"featured_media":468152,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476718","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Data Transformation: An Overview<\/mark>","faq_items":[{"question":"What is Data Transformation?","answer":"<p>Data transformation is a crucial process in data management that involves converting data from one format or structure into another. Its primary purpose is to improve data quality, compatibility, and usefulness for different applications, especially in data analysis and decision-making contexts.<\/p>"},{"question":"When was Data Transformation first mentioned?","answer":"<p>Data transformation, as we understand it today, was first mentioned in the context of Extract, Transform, Load (ETL) processes in the 1970s. These processes were pivotal in moving data from operational databases to decision support databases.<\/p>"},{"question":"What are the main steps involved in Data Transformation?","answer":"<p>The main steps involved in data transformation are data discovery, data mapping, code generation, execution, and review &amp; revision. These steps may vary based on the data and the transformation tools used.<\/p>"},{"question":"What are some key features of Data Transformation?","answer":"<p>Key features of data transformation include data cleansing (removing errors and inconsistencies), data standardization (making data compatible for integration), data aggregation (summarizing or grouping data), and data enrichment (improving data by adding related information).<\/p>"},{"question":"What are some types of Data Transformation?","answer":"<p>Data transformation types can be categorized into simple transformations, cleaning transformations, integration transformations, and advanced transformations based on the complexity and nature of the changes made to the data.<\/p>"},{"question":"What are some applications and challenges of Data Transformation?","answer":"<p>Data transformation is used in fields like data warehousing, data integration, machine learning, and business intelligence. The challenges of data transformation include the need for careful planning and execution, the time-consuming nature of the process, and the potential for data loss or inaccuracies.<\/p>"},{"question":"How is Data Transformation related to future technologies?","answer":"<p>Data transformation is expected to become even more important as the scale and complexity of data continue to grow. Emerging technologies like artificial intelligence (AI) and machine learning algorithms are beginning to be used to automate and optimize the data transformation process.<\/p>"},{"question":"What is the connection between Proxy Servers and Data Transformation?","answer":"<p>Proxy servers, particularly in the context of web data extraction or web scraping, can provide an additional layer where data transformation operations are performed. They can collect data, reformat, clean, or augment it before the data reaches its final destination. This can also help to ensure data privacy and security.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476718","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\/476718\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468152"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}