{"id":477125,"date":"2023-08-09T09:07:44","date_gmt":"2023-08-09T09:07:44","guid":{"rendered":""},"modified":"2023-09-05T11:14:04","modified_gmt":"2023-09-05T11:14:04","slug":"etl","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/etl\/","title":{"rendered":"ETL"},"content":{"rendered":"<p>ETL l\u00e0 m\u1ed9t thu\u1eadt ng\u1eef trong x\u1eed l\u00fd d\u1eef li\u1ec7u, vi\u1ebft t\u1eaft c\u1ee7a Extract, Transform, Load. Kh\u00e1i ni\u1ec7m n\u00e0y th\u1ec3 hi\u1ec7n m\u1ed9t quy tr\u00ecnh ba giai \u0111o\u1ea1n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong l\u01b0u tr\u1eef d\u1eef li\u1ec7u, t\u00edch h\u1ee3p d\u1eef li\u1ec7u v\u00e0 di chuy\u1ec3n d\u1eef li\u1ec7u. ETL \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c cho ph\u00e9p c\u00e1c doanh nghi\u1ec7p \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u s\u00e1ng su\u1ed1t.<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c c\u1ee7a ETL v\u00e0 s\u1ef1 \u0111\u1ec1 c\u1eadp \u0111\u1ea7u ti\u00ean c\u1ee7a n\u00f3<\/h2>\n<p>S\u1ef1 kh\u1edfi \u0111\u1ea7u c\u1ee7a quy tr\u00ecnh ETL b\u1eaft ngu\u1ed3n t\u1eeb cu\u1ed1i nh\u1eefng n\u0103m 1970 v\u00e0 \u0111\u1ea7u nh\u1eefng n\u0103m 1980 khi c\u00e1c doanh nghi\u1ec7p b\u1eaft \u0111\u1ea7u nh\u1eadn ra gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh. Thu\u1eadt ng\u1eef ETL \u0111\u01b0\u1ee3c c\u1ee7ng c\u1ed1 v\u00e0o nh\u1eefng n\u0103m 1990 khi kho d\u1eef li\u1ec7u b\u1eaft \u0111\u1ea7u tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn. R\u00f5 r\u00e0ng l\u00e0 c\u00e1c doanh nghi\u1ec7p c\u1ea7n m\u1ed9t quy tr\u00ecnh nh\u1ea5t qu\u00e1n \u0111\u1ec3 chuy\u1ec3n d\u1eef li\u1ec7u c\u1ee7a h\u1ecd t\u1eeb h\u1ec7 th\u1ed1ng v\u1eadn h\u00e0nh sang h\u1ec7 th\u1ed1ng h\u1ed7 tr\u1ee3 quy\u1ebft \u0111\u1ecbnh, d\u1eabn \u0111\u1ebfn vi\u1ec7c ch\u00ednh th\u1ee9c h\u00f3a ETL.<\/p>\n<h2>\u0110i s\u00e2u h\u01a1n v\u00e0o ETL<\/h2>\n<p>Quy tr\u00ecnh ETL r\u1ea5t c\u1ea7n thi\u1ebft trong chi\u1ebfn l\u01b0\u1ee3c t\u00edch h\u1ee3p d\u1eef li\u1ec7u v\u00e0 kinh doanh th\u00f4ng minh. N\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau, s\u1eeda \u0111\u1ed5i d\u1eef li\u1ec7u theo quy t\u1eafc kinh doanh v\u00e0 t\u1ea3i d\u1eef li\u1ec7u \u0111\u00f3 v\u00e0o kho d\u1eef li\u1ec7u \u0111\u00edch, ch\u1eb3ng h\u1ea1n nh\u01b0 kho d\u1eef li\u1ec7u ho\u1eb7c si\u00eau th\u1ecb d\u1eef li\u1ec7u. Qu\u00e1 tr\u00ecnh n\u00e0y cho ph\u00e9p c\u00e1c doanh nghi\u1ec7p h\u1ee3p nh\u1ea5t d\u1eef li\u1ec7u c\u1ee7a h\u1ecd th\u00e0nh m\u1ed9t kho l\u01b0u tr\u1eef th\u1ed1ng nh\u1ea5t, c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u, n\u00e2ng cao kh\u1ea3 n\u0103ng truy c\u1eadp v\u00e0 cho ph\u00e9p ph\u00e2n t\u00edch to\u00e0n di\u1ec7n.<\/p>\n<ol>\n<li>\n<p><strong>Khai th\u00e1c:<\/strong> B\u01b0\u1edbc \u0111\u1ea7u ti\u00ean trong quy tr\u00ecnh ETL li\u00ean quan \u0111\u1ebfn vi\u1ec7c tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb h\u1ec7 th\u1ed1ng ngu\u1ed3n. D\u1eef li\u1ec7u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c tr\u1ea3i r\u1ed9ng tr\u00ean c\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u, \u0111\u1ecbnh d\u1ea1ng ho\u1eb7c h\u1ec7 th\u1ed1ng kh\u00e1c nhau v\u00e0 qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t bao g\u1ed3m vi\u1ec7c t\u1eadp h\u1ee3p c\u00e1c d\u1eef li\u1ec7u n\u00e0y l\u1ea1i v\u1edbi nhau \u0111\u1ec3 x\u1eed l\u00fd th\u00eam.<\/p>\n<\/li>\n<li>\n<p><strong>Chuy\u1ec3n \u0111\u1ed5i:<\/strong> Trong giai \u0111o\u1ea1n n\u00e0y, d\u1eef li\u1ec7u tr\u00edch xu\u1ea5t \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh \u0111\u1ecbnh d\u1ea1ng nh\u1ea5t qu\u00e1n ph\u00f9 h\u1ee3p \u0111\u1ec3 ph\u00e2n t\u00edch v\u00e0 b\u00e1o c\u00e1o th\u00eam. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c l\u00e0m s\u1ea1ch d\u1eef li\u1ec7u, x\u1eed l\u00fd c\u00e1c gi\u00e1 tr\u1ecb b\u1ecb thi\u1ebfu, chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u v\u0103n b\u1ea3n th\u00e0nh gi\u00e1 tr\u1ecb s\u1ed1 v\u00e0 tri\u1ec3n khai c\u00e1c quy t\u1eafc kinh doanh.<\/p>\n<\/li>\n<li>\n<p><strong>\u0110ang t\u1ea3i:<\/strong> Cu\u1ed1i c\u00f9ng, d\u1eef li\u1ec7u \u0111\u00e3 chuy\u1ec3n \u0111\u1ed5i s\u1ebd \u0111\u01b0\u1ee3c t\u1ea3i v\u00e0o h\u1ec7 th\u1ed1ng \u0111\u00edch, ch\u1eb3ng h\u1ea1n nh\u01b0 kho d\u1eef li\u1ec7u, n\u01a1i doanh nghi\u1ec7p c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u \u0111\u00f3.<\/p>\n<\/li>\n<\/ol>\n<h2>Ho\u1ea1t \u0111\u1ed9ng b\u00ean trong c\u1ee7a ETL<\/h2>\n<p>V\u1ec1 c\u1ed1t l\u00f5i, ETL bao g\u1ed3m m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c quy tr\u00ecnh \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o vi\u1ec7c di chuy\u1ec3n v\u00e0 t\u00edch h\u1ee3p d\u1eef li\u1ec7u su\u00f4n s\u1ebb:<\/p>\n<ol>\n<li>\n<p><strong>Ph\u00e2n \u0111o\u1ea1n d\u1eef li\u1ec7u:<\/strong> D\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef t\u1ea1m th\u1eddi trong khu v\u1ef1c t\u1ed5 ch\u1ee9c, n\u01a1i n\u00f3 tr\u1ea3i qua c\u00e1c bi\u1ebfn \u0111\u1ed5i c\u1ea7n thi\u1ebft. \u0110i\u1ec1u n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 ng\u0103n ng\u1eeba m\u1ea5t d\u1eef li\u1ec7u v\u00e0 \u0111\u1ea3m b\u1ea3o chuy\u1ec3n \u0111\u1ed5i hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li>\n<p><strong>\u00c1nh x\u1ea1 d\u1eef li\u1ec7u:<\/strong> Qu\u00e1 tr\u00ecnh n\u00e0y li\u00ean quan \u0111\u1ebfn vi\u1ec7c li\u00ean k\u1ebft d\u1eef li\u1ec7u t\u1eeb \u0111\u1ecbnh d\u1ea1ng ngu\u1ed3n sang \u0111\u1ecbnh d\u1ea1ng \u0111\u00edch. N\u00f3 l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i, \u0111\u1ea3m b\u1ea3o t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<li>\n<p><strong>X\u1eed l\u00fd l\u1ed7i:<\/strong> C\u00e1c quy tr\u00ecnh ETL \u0111\u01b0\u1ee3c trang b\u1ecb c\u00e1c c\u01a1 ch\u1ebf x\u1eed l\u00fd l\u1ed7i \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh v\u00e0 kh\u1eafc ph\u1ee5c c\u00e1c l\u1ed7i c\u00f3 th\u1ec3 x\u1ea3y ra trong qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t, chuy\u1ec3n \u0111\u1ed5i ho\u1eb7c t\u1ea3i d\u1eef li\u1ec7u.<\/p>\n<\/li>\n<\/ol>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a ETL<\/h2>\n<p>M\u1ed9t s\u1ed1 t\u00ednh n\u0103ng n\u1ed5i b\u1eadt c\u1ee7a ETL bao g\u1ed3m:<\/p>\n<ul>\n<li><strong>T\u00edch h\u1ee3p d\u1eef li\u1ec7u:<\/strong> ETL cho ph\u00e9p doanh nghi\u1ec7p t\u00edch h\u1ee3p d\u1eef li\u1ec7u t\u1eeb c\u00e1c ngu\u1ed3n kh\u00e1c nhau v\u00e0o m\u1ed9t kho l\u01b0u tr\u1eef th\u1ed1ng nh\u1ea5t.<\/li>\n<li><strong>L\u00e0m s\u1ea1ch d\u1eef li\u1ec7u:<\/strong> Quy tr\u00ecnh ETL c\u1ea3i thi\u1ec7n ch\u1ea5t l\u01b0\u1ee3ng d\u1eef li\u1ec7u b\u1eb1ng c\u00e1ch l\u00e0m s\u1ea1ch, l\u1ecdc v\u00e0 thay th\u1ebf c\u00e1c gi\u00e1 tr\u1ecb null ho\u1eb7c kh\u00f4ng ch\u00ednh x\u00e1c.<\/li>\n<li><strong>Chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u:<\/strong> ETL cho ph\u00e9p c\u00e1c doanh nghi\u1ec7p h\u1ee3p nh\u1ea5t, t\u1ed5ng h\u1ee3p v\u00e0 t\u00f3m t\u1eaft d\u1eef li\u1ec7u, l\u00e0m cho d\u1eef li\u1ec7u ph\u00f9 h\u1ee3p cho vi\u1ec7c ph\u00e2n t\u00edch v\u00e0 b\u00e1o c\u00e1o.<\/li>\n<li><strong>Hi\u1ec7u su\u1ea5t:<\/strong> C\u00e1c c\u00f4ng c\u1ee5 ETL \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 x\u1eed l\u00fd kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t cao v\u00e0 x\u1eed l\u00fd d\u1eef li\u1ec7u nhanh ch\u00f3ng.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i ETL<\/h2>\n<p>C\u00f3 hai lo\u1ea1i ETL ch\u00ednh, \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t d\u1ef1a tr\u00ean ph\u01b0\u01a1ng ph\u00e1p tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u c\u1ee7a ch\u00fang:<\/p>\n<ol>\n<li>\n<p><strong>ETL t\u1ea3i \u0111\u1ea7y \u0111\u1ee7:<\/strong> T\u1ea1i \u0111\u00e2y, to\u00e0n b\u1ed9 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t, chuy\u1ec3n \u0111\u1ed5i v\u00e0 t\u1ea3i m\u1ed7i khi qu\u00e1 tr\u00ecnh ETL \u0111\u01b0\u1ee3c ch\u1ea1y.<\/p>\n<\/li>\n<li>\n<p><strong>T\u1ea3i ETL t\u0103ng d\u1ea7n:<\/strong> Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, ch\u1ec9 d\u1eef li\u1ec7u m\u1edbi ho\u1eb7c \u0111\u00e3 thay \u0111\u1ed5i m\u1edbi \u0111\u01b0\u1ee3c tr\u00edch xu\u1ea5t v\u00e0 t\u1ea3i, gi\u00fap qu\u00e1 tr\u00ecnh n\u00e0y nhanh h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<\/li>\n<\/ol>\n<h2>S\u1eed d\u1ee5ng ETL: C\u00e1c v\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<p>M\u1eb7c d\u00f9 ETL mang l\u1ea1i nhi\u1ec1u l\u1ee3i \u00edch nh\u01b0ng c\u0169ng c\u00f3 nh\u1eefng v\u1ea5n \u0111\u1ec1 ti\u1ec1m \u1ea9n li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng n\u00f3. Ch\u00fang c\u00f3 th\u1ec3 bao g\u1ed3m m\u1ea5t d\u1eef li\u1ec7u, d\u1eef li\u1ec7u kh\u00f4ng nh\u1ea5t qu\u00e1n, v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 x\u1eed l\u00fd l\u1ed7i ph\u1ee9c t\u1ea1p. Tuy nhi\u00ean, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p ETL m\u1ea1nh m\u1ebd c\u00f3 th\u1ec3 gi\u00fap v\u01b0\u1ee3t qua nh\u1eefng th\u00e1ch th\u1ee9c n\u00e0y.<\/p>\n<p>ETL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u t\u00ecnh hu\u1ed1ng, bao g\u1ed3m:<\/p>\n<ul>\n<li>Kho d\u1eef li\u1ec7u: \u0110\u1ec3 t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u t\u1eeb c\u00e1c ngu\u1ed3n kh\u00e1c nhau v\u00e0o m\u1ed9t kho l\u01b0u tr\u1eef th\u1ed1ng nh\u1ea5t.<\/li>\n<li>Kinh doanh th\u00f4ng minh: \u0110\u1ec3 chuy\u1ec3n \u0111\u1ed5i d\u1eef li\u1ec7u th\u00f4 th\u00e0nh nh\u1eefng hi\u1ec3u bi\u1ebft c\u00f3 \u00fd ngh\u0129a.<\/li>\n<li>Di chuy\u1ec3n d\u1eef li\u1ec7u: \u0110\u1ec3 di chuy\u1ec3n d\u1eef li\u1ec7u t\u1eeb h\u1ec7 th\u1ed1ng ho\u1eb7c \u0111\u1ecbnh d\u1ea1ng n\u00e0y sang h\u1ec7 th\u1ed1ng ho\u1eb7c \u0111\u1ecbnh d\u1ea1ng kh\u00e1c.<\/li>\n<\/ul>\n<h2>So s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a ETL<\/h2>\n<p>\u0110\u1ec3 hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 ETL, \u0111\u00e2y l\u00e0 so s\u00e1nh ETL v\u1edbi c\u00e1c thu\u1eadt ng\u1eef x\u1eed l\u00fd d\u1eef li\u1ec7u t\u01b0\u01a1ng t\u1ef1:<\/p>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt ng\u1eef<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<th>So s\u00e1nh v\u1edbi ETL<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ETL<\/td>\n<td>Tr\u00edch xu\u1ea5t, chuy\u1ec3n \u0111\u1ed5i, t\u1ea3i - \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u00edch h\u1ee3p d\u1eef li\u1ec7u t\u1eeb nhi\u1ec1u ngu\u1ed3n kh\u00e1c nhau<\/td>\n<td>Trung t\u00e2m l\u01b0u tr\u1eef d\u1eef li\u1ec7u v\u00e0 kinh doanh th\u00f4ng minh<\/td>\n<\/tr>\n<tr>\n<td>ELT<\/td>\n<td>Tr\u00edch xu\u1ea5t, t\u1ea3i, chuy\u1ec3n \u0111\u1ed5i \u2013 h\u1eefu \u00edch khi chuy\u1ec3n \u0111\u1ed5i kh\u00f4ng nh\u1ea1y c\u1ea3m v\u1edbi th\u1eddi gian<\/td>\n<td>Kh\u00f4ng gi\u1ed1ng nh\u01b0 ETL, qu\u00e1 tr\u00ecnh chuy\u1ec3n \u0111\u1ed5i x\u1ea3y ra sau khi t\u1ea3i d\u1eef li\u1ec7u v\u00e0o h\u1ec7 th\u1ed1ng \u0111\u00edch<\/td>\n<\/tr>\n<tr>\n<td>ETLT<\/td>\n<td>Tr\u00edch xu\u1ea5t, Chuy\u1ec3n \u0111\u1ed5i, T\u1ea3i, Chuy\u1ec3n \u0111\u1ed5i \u2013 c\u00f3 l\u1ee3i cho c\u00e1c ph\u00e9p bi\u1ebfn \u0111\u1ed5i ph\u1ee9c t\u1ea1p<\/td>\n<td>ETLT k\u1ebft h\u1ee3p chuy\u1ec3n \u0111\u1ed5i b\u1ed5 sung sau giai \u0111o\u1ea1n t\u1ea3i, kh\u00f4ng gi\u1ed1ng nh\u01b0 ETL truy\u1ec1n th\u1ed1ng<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>T\u01b0\u01a1ng lai c\u1ee7a ETL: C\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i<\/h2>\n<p>Khi d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng tr\u1edf n\u00ean quan tr\u1ecdng, quy tr\u00ecnh ETL \u0111ang ph\u00e1t tri\u1ec3n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 v\u00e0 xu h\u01b0\u1edbng m\u1edbi. H\u1ecdc m\u00e1y v\u00e0 AI \u0111ang \u0111\u01b0\u1ee3c k\u1ebft h\u1ee3p \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u00e1c quy tr\u00ecnh ETL. ETL th\u1eddi gian th\u1ef1c l\u00e0 m\u1ed9t xu h\u01b0\u1edbng m\u1edbi n\u1ed5i kh\u00e1c, \u0111\u00e1p \u1ee9ng nhu c\u1ea7u ph\u00e2n t\u00edch d\u1eef li\u1ec7u t\u1ee9c th\u1eddi v\u00e0 ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n<h2>M\u00e1y ch\u1ee7 proxy v\u00e0 ETL<\/h2>\n<p>Trong b\u1ed1i c\u1ea3nh ETL, m\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c \u0111\u1ea3m b\u1ea3o tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3, \u0111\u1eb7c bi\u1ec7t khi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u1ea5y t\u1eeb internet ho\u1eb7c h\u1ec7 th\u1ed1ng b\u00ean ngo\u00e0i. M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 gi\u00fap qu\u1ea3n l\u00fd c\u00e1c y\u00eau c\u1ea7u v\u00e0 ph\u00e2n ph\u1ed1i l\u01b0u l\u01b0\u1ee3ng m\u1ea1ng, \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh tr\u00edch xu\u1ea5t d\u1eef li\u1ec7u di\u1ec5n ra su\u00f4n s\u1ebb. H\u01a1n n\u1eefa, h\u1ecd c\u00f3 th\u1ec3 th\u00eam m\u1ed9t l\u1edbp b\u1ea3o m\u1eadt b\u1ed5 sung, b\u1ea3o v\u1ec7 m\u1ea1ng n\u1ed9i b\u1ed9 kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda ti\u1ec1m \u1ea9n.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 \u0111\u1ecdc th\u00eam v\u00e0 t\u00e0i nguy\u00ean v\u1ec1 ETL:<\/p>\n<ol>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Extract,_transform,_load\" target=\"_new\" rel=\"noopener nofollow\">T\u1ed5ng quan v\u1ec1 ETL<\/a><\/li>\n<li><a href=\"https:\/\/www.gartner.com\/reviews\/market\/data-integration-tools\" target=\"_new\" rel=\"noopener nofollow\">C\u00f4ng c\u1ee5 ETL hi\u1ec7n \u0111\u1ea1i<\/a><\/li>\n<li><a href=\"https:\/\/www.datavirtuality.com\/blog\/what-is-etl\/\" target=\"_new\" rel=\"noopener nofollow\">Gi\u1edbi thi\u1ec7u v\u1ec1 quy tr\u00ecnh ETL<\/a><\/li>\n<li><a href=\"https:\/\/www.talend.com\/blog\/2017\/02\/27\/10-etl-best-practices\/\" target=\"_new\" rel=\"noopener nofollow\">Th\u1ef1c ti\u1ec5n t\u1ed1t nh\u1ea5t v\u1ec1 ETL<\/a><\/li>\n<li><a href=\"https:\/\/www.informatica.com\/services-and-training\/glossary-of-terms\/etl-definition.html\" target=\"_new\" rel=\"noopener nofollow\">ETL trong k\u1ef7 nguy\u00ean D\u1eef li\u1ec7u l\u1edbn<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/vn\/blog\/understanding-proxy-servers\/\" target=\"_new\" rel=\"noopener\">T\u00ecm hi\u1ec3u m\u00e1y ch\u1ee7 proxy<\/a><\/li>\n<\/ol>\n<p>T\u1ed5ng quan to\u00e0n di\u1ec7n n\u00e0y v\u1ec1 ETL g\u00f3i g\u1ecdn t\u1ea7m quan tr\u1ecdng c\u1ee7a n\u00f3 trong c\u00e1c doanh nghi\u1ec7p d\u1ef1a tr\u00ean d\u1eef li\u1ec7u hi\u1ec7n \u0111\u1ea1i v\u00e0 c\u00e1ch n\u00f3 cho ph\u00e9p t\u00edch h\u1ee3p, chuy\u1ec3n \u0111\u1ed5i v\u00e0 t\u1ea3i d\u1eef li\u1ec7u hi\u1ec7u qu\u1ea3. Vai tr\u00f2 c\u1ee7a m\u00e1y ch\u1ee7 proxy trong vi\u1ec7c t\u0103ng c\u01b0\u1eddng quy tr\u00ecnh ETL c\u0169ng \u0111\u01b0\u1ee3c n\u00eau r\u00f5, n\u00eau b\u1eadt t\u00ednh ch\u1ea5t \u0111an xen c\u1ee7a vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u v\u00e0 b\u1ea3o m\u1eadt m\u1ea1ng.<\/p>","protected":false},"featured_media":468332,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477125","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Comprehensive Overview of ETL (Extract, Transform, Load) Processes<\/mark>","faq_items":[{"question":"What does ETL stand for and what does it do?","answer":"<p>ETL stands for Extract, Transform, and Load. It is a process used in data handling that involves extracting data from various sources, transforming it into a suitable format based on business rules, and then loading it into a destination data store such as a data warehouse. This process is essential for data integration, data warehousing, and business intelligence.<\/p>"},{"question":"What is the history of ETL?","answer":"<p>The concept of ETL originated in the late 1970s and early 1980s when businesses began to recognize the value of decision support systems. The formal terminology of ETL was established in the 1990s with the rise of data warehousing. It offered a consistent process to move data from operational systems to decision support systems.<\/p>"},{"question":"How does the ETL process work?","answer":"<p>The ETL process begins with the extraction of data from various sources. This data is then transformed into a consistent format for further analysis and reporting. The transformed data is finally loaded into a target system like a data warehouse for further analysis and reporting.<\/p>"},{"question":"What are the key features of ETL?","answer":"<p>The key features of ETL include data integration, data cleaning, data transformation, and performance handling. It allows for the integration of data from multiple sources into a unified repository, improves data quality by cleaning and replacing null or incorrect values, and handles large volumes of data efficiently.<\/p>"},{"question":"What types of ETL exist?","answer":"<p>There are primarily two types of ETL based on the method of extraction: Full Load ETL, where the entire data is extracted, transformed, and loaded each time the ETL process is run, and Incremental Load ETL, where only new or changed data is extracted and loaded, making the process more efficient.<\/p>"},{"question":"What are some of the uses and challenges of ETL?","answer":"<p>ETL is used for data warehousing, business intelligence, and data migration. It enables the aggregation of data from various sources into a unified repository, transforming raw data into meaningful insights, and moving data from one system or format to another. However, challenges such as data loss, inconsistency, and complex error handling can arise. These can be mitigated by using robust ETL tools and methodologies.<\/p>"},{"question":"How does ETL differ from similar terms like ELT and ETLT?","answer":"<p>ETL, ELT (Extract, Load, Transform), and ETLT (Extract, Transform, Load, Transform) are all data processing techniques. ETL focuses on transforming data before it's loaded into the target system. ELT, on the other hand, transforms data after it's loaded. ETLT adds another transformation stage after loading, beneficial for complex transformations.<\/p>"},{"question":"What does the future hold for ETL?","answer":"<p>With the advent of new technologies and trends, ETL is evolving to include machine learning and AI to automate and optimize the process. Real-time ETL is also emerging to cater to the need for instant data analysis and decision-making.<\/p>"},{"question":"How can proxy servers be used with ETL?","answer":"<p>Proxy servers can help manage requests and distribute network traffic during the data extraction stage of ETL, ensuring smooth data extraction, particularly when data is sourced from the internet or external systems. They also add an additional layer of security, protecting the internal network from potential threats.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477125","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\/477125\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/468332"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}