{"id":477258,"date":"2023-08-09T09:09:43","date_gmt":"2023-08-09T09:09:43","guid":{"rendered":""},"modified":"2023-09-05T11:14:23","modified_gmt":"2023-09-05T11:14:23","slug":"flat-file","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/flat-file\/","title":{"rendered":"t\u1eadp tin ph\u1eb3ng"},"content":{"rendered":"

T\u1ec7p ph\u1eb3ng l\u00e0 m\u1ed9t th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu trong t\u00ednh to\u00e1n v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u, th\u1ec3 hi\u1ec7n c\u00e1ch ti\u1ebfp c\u1eadn \u0111\u01a1n gi\u1ea3n trong vi\u1ec7c t\u1ed5 ch\u1ee9c v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u. Ch\u00fang \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c t\u1ec7p ch\u1ee9a c\u00e1c b\u1ea3n ghi kh\u00f4ng c\u00f3 m\u1ed1i quan h\u1ec7 qua l\u1ea1i c\u00f3 c\u1ea5u tr\u00fac. D\u1eef li\u1ec7u trong t\u1ec7p ph\u1eb3ng th\u01b0\u1eddng \u0111\u1ed9c l\u1eadp v\u00e0 kh\u00f4ng d\u1ef1a v\u00e0o c\u00e1c ngu\u1ed3n d\u1eef li\u1ec7u ho\u1eb7c m\u1ed1i quan h\u1ec7 kh\u00e1c \u0111\u1ec3 hi\u1ec3u v\u00e0 di\u1ec5n gi\u1ea3i d\u1eef li\u1ec7u.<\/p>\n

H\u00e0nh tr\u00ecnh l\u1ecbch s\u1eed c\u1ee7a t\u1eadp tin ph\u1eb3ng<\/h2>\n

C\u00e1c t\u1eadp tin ph\u1eb3ng \u0111\u00e3 t\u1ed3n t\u1ea1i g\u1ea7n nh\u01b0 l\u00e2u nh\u01b0 m\u00e1y t\u00ednh. Vi\u1ec7c \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u1ec7p ph\u1eb3ng l\u1ea7n \u0111\u1ea7u ti\u00ean c\u00f3 t\u1eeb nh\u1eefng n\u0103m 1960 khi s\u1ef1 ra \u0111\u1eddi c\u1ee7a ph\u01b0\u01a1ng ph\u00e1p l\u01b0u tr\u1eef d\u1eef li\u1ec7u d\u1ef1a tr\u00ean m\u00e1y t\u00ednh khi\u1ebfn vi\u1ec7c t\u1ea1o ra m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p l\u01b0u tr\u1eef v\u00e0 truy xu\u1ea5t d\u1eef li\u1ec7u tr\u1edf n\u00ean c\u1ea7n thi\u1ebft. Trong tr\u01b0\u1eddng h\u1ee3p kh\u00f4ng c\u00f3 c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 h\u1ec7 th\u1ed1ng quan h\u1ec7 ti\u00ean ti\u1ebfn, c\u00e1c t\u1ec7p ph\u1eb3ng l\u00e0 gi\u1ea3i ph\u00e1p t\u1ef1 nhi\u00ean, \u0111\u01a1n gi\u1ea3n.<\/p>\n

K\u1ec3 t\u1eeb \u0111\u00f3, c\u00e1c t\u1ec7p ph\u1eb3ng v\u1eabn ti\u1ebfp t\u1ee5c ph\u00f9 h\u1ee3p ngay c\u1ea3 v\u1edbi s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a c\u00e1c h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u ti\u00ean ti\u1ebfn. T\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 th\u1ef1c t\u1ebf l\u00e0 ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng khi\u1ebfn ch\u00fang tr\u1edf th\u00e0nh l\u1ef1a ch\u1ecdn \u01b0u ti\u00ean cho nhi\u1ec1u ch\u1ee9c n\u0103ng kh\u00e1c nhau.<\/p>\n

\u0110i s\u00e2u v\u00e0o kh\u00e1i ni\u1ec7m v\u1ec1 t\u1ec7p ph\u1eb3ng<\/h2>\n

M\u1ed9t t\u1ec7p ph\u1eb3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c coi \u0111\u01a1n gi\u1ea3n l\u00e0 m\u1ed9t b\u1ea3ng trong t\u1ec7p v\u0103n b\u1ea3n n\u01a1i d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf d\u1ea1ng v\u0103n b\u1ea3n thu\u1ea7n t\u00fay. M\u1ed7i d\u00f2ng c\u1ee7a t\u1ec7p th\u01b0\u1eddng \u0111\u1ea1i di\u1ec7n cho m\u1ed9t b\u1ea3n ghi duy nh\u1ea5t v\u00e0 m\u1ed7i tr\u01b0\u1eddng d\u1eef li\u1ec7u ho\u1eb7c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng m\u1ed9t d\u1ea5u ph\u00e2n c\u00e1ch c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u1ea5u ph\u1ea9y, tab ho\u1eb7c d\u1ea5u ch\u1ea5m ph\u1ea9y.<\/p>\n

C\u00e1c t\u1ec7p ph\u1eb3ng v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 m\u1ea3ng d\u1eef li\u1ec7u hai chi\u1ec1u v\u00e0 ch\u00fang kh\u00f4ng bao g\u1ed3m b\u1ea5t k\u1ef3 lo\u1ea1i k\u00fd t\u1ef1 c\u1ea5u tr\u00fac ho\u1eb7c m\u00f4 t\u1ea3 d\u1eef li\u1ec7u n\u00e0o (tr\u1eeb khi \u0111\u01b0\u1ee3c \u0111\u1eb7t trong v\u0103n b\u1ea3n). Ch\u00fang c\u00f3 th\u1ec3 \u1edf d\u1ea1ng con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c (nh\u01b0 t\u1ec7p CSV) ho\u1eb7c t\u1ec7p nh\u1ecb ph\u00e2n (ch\u1ec9 m\u00e1y c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c). M\u1ed9t kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ee7a c\u00e1c t\u1ec7p ph\u1eb3ng l\u00e0 ch\u00fang thi\u1ebfu kh\u1ea3 n\u0103ng l\u1eadp ch\u1ec9 m\u1ee5c ho\u1eb7c c\u00e1c m\u1ed1i quan h\u1ec7 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c m\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 s\u1edf h\u1eefu.<\/p>\n

Hi\u1ec3u c\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a t\u1ec7p ph\u1eb3ng<\/h2>\n

C\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t t\u1ec7p ph\u1eb3ng t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 hi\u1ec3u. M\u1ed9t t\u1ec7p ph\u1eb3ng ch\u1ee9a c\u00e1c b\u1ea3n ghi, m\u1ed7i b\u1ea3n ghi \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c tr\u01b0\u1eddng. M\u1ed7i b\u1ea3n ghi bao g\u1ed3m c\u00f9ng m\u1ed9t chu\u1ed7i c\u00e1c tr\u01b0\u1eddng. C\u00e1c tr\u01b0\u1eddng n\u00e0y l\u00e0 \u0111\u01a1n v\u1ecb l\u01b0u tr\u1eef d\u1eef li\u1ec7u c\u01a1 b\u1ea3n v\u00e0 m\u1ed7i tr\u01b0\u1eddng th\u01b0\u1eddng ch\u1ee9a th\u00f4ng tin li\u00ean quan \u0111\u1ebfn m\u1ed9t kh\u00eda c\u1ea1nh ho\u1eb7c thu\u1ed9c t\u00ednh c\u1ee7a th\u1ef1c th\u1ec3 \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1edfi b\u1ea3n ghi.<\/p>\n

V\u00ed d\u1ee5: c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1ec7p ph\u1eb3ng l\u01b0u tr\u1eef th\u00f4ng tin kh\u00e1ch h\u00e0ng c\u00f3 th\u1ec3 ch\u1ee9a c\u00e1c b\u1ea3n ghi bao g\u1ed3m c\u00e1c tr\u01b0\u1eddng cho t\u00ean, h\u1ecd, s\u1ed1 \u0111i\u1ec7n tho\u1ea1i v\u00e0 \u0111\u1ecba ch\u1ec9 email. M\u1ed7i b\u1ea3n ghi s\u1ebd tu\u00e2n theo c\u00f9ng m\u1ed9t c\u1ea5u tr\u00fac v\u00e0 ch\u1ee9a th\u00f4ng tin v\u1ec1 c\u00e1c tr\u01b0\u1eddng n\u00e0y cho m\u1ed7i kh\u00e1ch h\u00e0ng.<\/p>\n

C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a t\u1ec7p ph\u1eb3ng<\/h2>\n
    \n
  1. S\u1ef1 \u0111\u01a1n gi\u1ea3n:<\/strong> C\u1ea5u tr\u00fac c\u1ee7a t\u1ec7p ph\u1eb3ng kh\u00f4ng ph\u1ee9c t\u1ea1p, gi\u00fap d\u1ec5 d\u00e0ng t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd.<\/li>\n
  2. T\u00ednh di \u0111\u1ed9ng:<\/strong> C\u00e1c t\u1ec7p ph\u1eb3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ecdc v\u00e0 s\u1eed d\u1ee5ng tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng kh\u00e1c nhau, l\u00e0m t\u0103ng t\u00ednh ti\u1ec7n \u00edch c\u1ee7a ch\u00fang.<\/li>\n
  3. C\u1ea5u tr\u00fac th\u1ed1ng nh\u1ea5t:<\/strong> T\u1ea5t c\u1ea3 c\u00e1c b\u1ea3n ghi \u0111\u1ec1u tu\u00e2n theo c\u00f9ng m\u1ed9t c\u1ea5u tr\u00fac, \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u.<\/li>\n
  4. Thi\u1ebfu c\u00e1c m\u1ed1i quan h\u1ec7:<\/strong> T\u1ec7p ph\u1eb3ng kh\u00f4ng h\u1ed7 tr\u1ee3 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c b\u1ea3n ghi ho\u1eb7c truy v\u1ea5n ph\u1ee9c t\u1ea1p, h\u1ea1n ch\u1ebf t\u00ednh h\u1eefu \u00edch c\u1ee7a ch\u00fang \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p.<\/li>\n
  5. D\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng:<\/strong> V\u00ec kh\u00f4ng c\u00f3 m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c b\u1ea3n ghi n\u00ean d\u1eef li\u1ec7u th\u01b0\u1eddng b\u1ecb l\u1eb7p l\u1ea1i.<\/li>\n<\/ol>\n

    C\u00e1c lo\u1ea1i t\u1ec7p ph\u1eb3ng kh\u00e1c nhau<\/h2>\n

    C\u00e1c t\u1ec7p ph\u1eb3ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i d\u1ef1a tr\u00ean \u0111\u1ecbnh d\u1ea1ng v\u00e0 c\u1ea5u tr\u00fac c\u1ee7a d\u1eef li\u1ec7u. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c lo\u1ea1i ch\u00ednh:<\/p>\n\n\n\n\n\n\n\n\n
    Lo\u1ea1i t\u1ec7p ph\u1eb3ng<\/th>\nS\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n
    CSV (Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y)<\/strong><\/td>\nLo\u1ea1i t\u1ec7p ph\u1eb3ng n\u00e0y s\u1eed d\u1ee5ng d\u1ea5u ph\u1ea9y l\u00e0m d\u1ea5u ph\u00e2n c\u00e1ch \u0111\u1ec3 ph\u00e2n t\u00e1ch c\u00e1c tr\u01b0\u1eddng d\u1eef li\u1ec7u kh\u00e1c nhau.<\/td>\n<\/tr>\n
    TSV (Gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng tab)<\/strong><\/td>\n\u0110\u1ecbnh d\u1ea1ng n\u00e0y s\u1eed d\u1ee5ng k\u00fd t\u1ef1 tab \u0111\u1ec3 ph\u00e2n t\u00e1ch c\u00e1c tr\u01b0\u1eddng trong b\u1ea3n ghi.<\/td>\n<\/tr>\n
    Chi\u1ec1u r\u1ed9ng c\u1ed1 \u0111\u1ecbnh<\/strong><\/td>\nM\u1ed7i tr\u01b0\u1eddng trong t\u1ec7p c\u00f3 c\u00f9ng \u0111\u1ed9 d\u00e0i, \u0111\u1ea3m b\u1ea3o k\u00edch th\u01b0\u1edbc b\u1ea3n ghi nh\u1ea5t qu\u00e1n.<\/td>\n<\/tr>\n
    T\u1ec7p v\u0103n b\u1ea3n<\/strong><\/td>\n\u0110\u00e2y l\u00e0 nh\u1eefng t\u1ec7p ph\u1eb3ng c\u00f3 m\u1ee5c \u0111\u00edch chung ch\u1ee9a v\u0103n b\u1ea3n m\u00e0 con ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    S\u1eed d\u1ee5ng t\u1ec7p ph\u1eb3ng: V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n

    T\u1ec7p ph\u1eb3ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 di chuy\u1ec3n d\u1eef li\u1ec7u gi\u1eefa c\u00e1c ph\u1ea7n m\u1ec1m, h\u1ec7 th\u1ed1ng ho\u1eb7c d\u1ecbch v\u1ee5 kh\u00e1c nhau kh\u00f4ng nh\u1ea5t thi\u1ebft ph\u1ea3i chia s\u1ebb \u0111\u1ecbnh d\u1ea1ng chung. Ch\u00fang c\u0169ng h\u1eefu \u00edch trong vi\u1ec7c l\u01b0u tr\u1eef d\u1eef li\u1ec7u khi c\u1ea7n l\u01b0u tr\u1eef m\u1ed9t l\u01b0\u1ee3ng l\u1edbn d\u1eef li\u1ec7u \u1edf \u0111\u1ecbnh d\u1ea1ng chu\u1ea9n.<\/p>\n

    C\u00e1c v\u1ea5n \u0111\u1ec1 ch\u00ednh li\u00ean quan \u0111\u1ebfn vi\u1ec7c s\u1eed d\u1ee5ng t\u1ec7p ph\u1eb3ng bao g\u1ed3m d\u01b0 th\u1eeba d\u1eef li\u1ec7u, kh\u00f3 qu\u1ea3n l\u00fd t\u1ec7p l\u1edbn h\u01a1n, thi\u1ebfu b\u1ea3o m\u1eadt v\u00e0 h\u1ed7 tr\u1ee3 h\u1ea1n ch\u1ebf cho c\u00e1c truy v\u1ea5n ph\u1ee9c t\u1ea1p. Nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p h\u01a1n cho c\u00e1c nhu c\u1ea7u l\u01b0u tr\u1eef d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p h\u01a1n.<\/p>\n

    So s\u00e1nh v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh<\/h2>\n\n\n\n\n\n\n\n\n
    \u0111\u1eb7c tr\u01b0ng<\/th>\nT\u1ec7p ph\u1eb3ng<\/th>\nC\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7<\/th>\n<\/tr>\n<\/thead>\n
    K\u1ebft c\u1ea5u<\/strong><\/td>\nC\u1ea5u tr\u00fac \u0111\u01a1n gi\u1ea3n, th\u1ed1ng nh\u1ea5t<\/td>\nC\u1ea5u tr\u00fac ph\u1ee9c t\u1ea1p v\u1edbi c\u00e1c m\u1ed1i quan h\u1ec7<\/td>\n<\/tr>\n
    D\u1eef li\u1ec7u d\u1ef1 ph\u00f2ng<\/strong><\/td>\nChung, do thi\u1ebfu quan h\u1ec7<\/td>\nGi\u1ea3m thi\u1ec3u th\u00f4ng qua chu\u1ea9n h\u00f3a<\/td>\n<\/tr>\n
    B\u1ea3o v\u1ec7<\/strong><\/td>\nT\u00ednh n\u0103ng b\u1ea3o m\u1eadt h\u1ea1n ch\u1ebf<\/td>\nT\u00ednh n\u0103ng b\u1ea3o m\u1eadt n\u00e2ng cao<\/td>\n<\/tr>\n
    Truy v\u1ea5n ph\u1ee9c t\u1ea1p<\/strong><\/td>\nKh\u00f4ng \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3<\/td>\n\u0110\u01b0\u1ee3c h\u1ed7 tr\u1ee3 th\u00f4ng qua SQL<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 t\u01b0\u01a1ng lai g\u1eafn li\u1ec1n v\u1edbi t\u1ec7p ph\u1eb3ng<\/h2>\n

    C\u00e1c t\u1ec7p ph\u1eb3ng c\u00f3 th\u1ec3 s\u1ebd ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong t\u01b0\u01a1ng lai g\u1ea7n do t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 linh ho\u1ea1t c\u1ee7a ch\u00fang. V\u1edbi s\u1ef1 ra \u0111\u1eddi c\u1ee7a D\u1eef li\u1ec7u l\u1edbn v\u00e0 Khoa h\u1ecdc d\u1eef li\u1ec7u, t\u1ec7p CSV, m\u1ed9t lo\u1ea1i t\u1ec7p ph\u1eb3ng, \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i \u0111\u1ec3 ph\u00e2n t\u00edch d\u1eef li\u1ec7u v\u00e0 H\u1ecdc m\u00e1y. H\u01a1n n\u1eefa, c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 XML v\u00e0 JSON, m\u1eb7c d\u00f9 ph\u1ee9c t\u1ea1p h\u01a1n, nh\u01b0ng c\u00f3 chung kh\u1ea3 n\u0103ng truy c\u1eadp chung khi\u1ebfn c\u00e1c t\u1ec7p ph\u1eb3ng tr\u1edf n\u00ean ph\u1ed5 bi\u1ebfn v\u00e0 c\u00f3 th\u1ec3 s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u0111\u1ecbnh d\u1ea1ng l\u01b0u tr\u1eef t\u1ec7p trong t\u01b0\u01a1ng lai.<\/p>\n

    T\u1ec7p ph\u1eb3ng v\u00e0 m\u00e1y ch\u1ee7 proxy<\/h2>\n

    M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 t\u1eadn d\u1ee5ng c\u00e1c t\u1ec7p ph\u1eb3ng cho nhi\u1ec1u m\u1ee5c \u0111\u00edch kh\u00e1c nhau. Ch\u1eb3ng h\u1ea1n, h\u1ecd c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u1ec7p ph\u1eb3ng \u0111\u1ec3 duy tr\u00ec nh\u1eadt k\u00fd c\u00e1c y\u00eau c\u1ea7u, ph\u1ea3n h\u1ed3i v\u00e0 nh\u1eadt k\u00fd l\u1ed7i m\u1ea1ng. C\u00e1c nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy c\u0169ng c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c t\u1ec7p ph\u1eb3ng \u0111\u1ec3 l\u01b0u tr\u1eef c\u1ea5u h\u00ecnh ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c \u0111\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u t\u1ea1m th\u1eddi trong c\u00e1c quy tr\u00ecnh nh\u01b0 ho\u1ea1t \u0111\u1ed9ng h\u00e0ng lo\u1ea1t.<\/p>\n

    Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n
      \n
    1. Thi\u1ebft k\u1ebf c\u01a1 s\u1edf d\u1eef li\u1ec7u t\u1ec7p ph\u1eb3ng: H\u01b0\u1edbng d\u1eabn d\u1ee9t kho\u00e1t<\/a><\/li>\n
    2. T\u1ec7p ph\u1eb3ng v\u00e0 d\u1ef1 ph\u00f2ng d\u1eef li\u1ec7u<\/a><\/li>\n
    3. Hi\u1ec3u t\u1ec7p CSV<\/a><\/li>\n<\/ol>\n

      T\u00f3m l\u1ea1i, m\u1eb7c d\u00f9 c\u00e1c t\u1ec7p ph\u1eb3ng kh\u00f4ng ph\u00f9 h\u1ee3p v\u1edbi nhu c\u1ea7u l\u01b0u tr\u1eef d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p do thi\u1ebfu h\u1ed7 tr\u1ee3 cho c\u00e1c m\u1ed1i quan h\u1ec7 v\u00e0 truy v\u1ea5n ph\u1ee9c t\u1ea1p, nh\u01b0ng ch\u00fang v\u1eabn ti\u1ebfp t\u1ee5c c\u00f3 gi\u00e1 tr\u1ecb v\u00ec t\u00ednh \u0111\u01a1n gi\u1ea3n v\u00e0 t\u00ednh di \u0111\u1ed9ng c\u1ee7a ch\u00fang. V\u1edbi c\u00e1c c\u00f4ng ngh\u1ec7 m\u1edbi n\u1ed5i, vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c t\u1ec7p ph\u1eb3ng s\u1ebd ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n v\u00e0 th\u00edch \u1ee9ng v\u1edbi nhu c\u1ea7u thay \u0111\u1ed5i c\u1ee7a th\u1ebf gi\u1edbi k\u1ef9 thu\u1eadt s\u1ed1.<\/p>","protected":false},"featured_media":477259,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-477258","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about Flat Files: A Comprehensive Overview<\/mark>","faq_items":[{"question":"What are flat files, and when were they first used?","answer":"

      Flat files are simple data storage files that contain records with no structured interrelation. They are like tables within text files, where each line represents a single record, and data fields are separated by delimiters. The first mention of flat files dates back to the 1960s when they became necessary for computer-based data storage before advanced relational databases existed.<\/p>"},{"question":"How do flat files work, and what is their internal structure?","answer":"

      Flat files work by storing data in plain text form, organized into records and fields. Each record consists of the same sequence of fields, and each field typically holds information related to one aspect or attribute of the entity represented by the record. Flat files lack indexing and relationships, making them straightforward but less suitable for complex data organization.<\/p>"},{"question":"What are the key features of flat files?","answer":"

      The key features of flat files include their simplicity, portability, and uniform structure. They are easy to create and use, can be read across different platforms, and follow the same structure for all records. However, they lack support for relationships, leading to data redundancy and limited support for complex queries.<\/p>"},{"question":"What types of flat files exist, and how do they differ?","answer":"

      There are several types of flat files based on their formatting and structure. The main types include CSV (Comma Separated Values) files, TSV (Tab Separated Values) files, Fixed Width files, and general-purpose Text Files. Each type uses different delimiters or formatting rules for storing data.<\/p>"},{"question":"How are flat files used, and what problems do they pose?","answer":"

      Flat files are commonly used for moving data between different software or systems and in data warehousing for standardized data storage. However, they can lead to data redundancy, difficulties in managing larger files, lack of security, and limitations in handling complex queries. For more complex data storage needs, advanced database systems are recommended.<\/p>"},{"question":"How do flat files compare to relational databases?","answer":"

      Flat files have a simple and uniform structure, while relational databases have a more complex structure with relationships between tables. Flat files tend to suffer from data redundancy due to their lack of relations, while relational databases minimize redundancy through normalization. Relational databases also offer advanced security features and support complex queries through SQL.<\/p>"},{"question":"What does the future hold for flat files, and how are they associated with proxy servers?","answer":"

      Flat files are likely to remain relevant due to their simplicity and versatility. With technologies like XML and JSON gaining prominence, flat files will continue to influence future file storage formats. Proxy servers can use flat files for maintaining logs and user configurations, as well as for temporary storage during various processes.<\/p>"},{"question":"Where can I find more information about flat files?","answer":"

      For more in-depth information about flat files, you can explore the following links:<\/p>

      1. Flat File Database Design: A Definitive Guide<\/a><\/li>
      2. Flat Files and Data Redundancy<\/a><\/li>
      3. Understanding CSV Files<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/477258","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\/477258\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/477259"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=477258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}