{"id":399,"date":"2024-07-08T05:34:22","date_gmt":"2024-07-08T05:34:22","guid":{"rendered":"https:\/\/the.2days.kr\/?p=399"},"modified":"2024-07-08T05:34:22","modified_gmt":"2024-07-08T05:34:22","slug":"%ea%b4%80%ea%b3%84%ed%98%95-%eb%8d%b0%ec%9d%b4%ed%84%b0%eb%b2%a0%ec%9d%b4%ec%8a%a4-%ec%9e%90%ec%84%b8%ed%9e%88-%ec%95%8c%ec%95%84%eb%b3%b4%ea%b8%b0","status":"publish","type":"post","link":"https:\/\/the.2days.kr\/?p=399","title":{"rendered":"\uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc790\uc138\ud788 \uc54c\uc544\ubcf4\uae30"},"content":{"rendered":"
\n

\n
\n
\n<\/span>
\n \ub370\uc774\ud0c0\ubca0\uc774\uc2a4(Database)
\n <\/figcaption><\/figure>\n<\/p>\n

\n
\n \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub780?
\n <\/b>\n<\/p>\n

\n \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \uad00\uacc4\ud615 \ub370\uc774\ud130 \ubaa8\ub378\uc744 \uae30\ubc18\uc73c\ub85c \ud604\uc7ac \uac00\uc7a5 \ub9ce\uc774 \uc0ac\uc6a9\ub418\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uad6c\uc870, \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74, \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc81c\uacf5\ud558\ub294 \uad00\uacc4\ud615 \ub300\uc218 \uc5f0\uc0b0\uc5d0 \ub300\ud574 \uc54c\uc544\ubd05\uc2dc\ub2e4.\n <\/p>\n

\n

\n

\n
\n \ud559\uc0dd \ub9b4\ub808\uc774\uc158 \uc608\uc2dc
\n <\/b>\n<\/p>\n\n\n\n\n\n\n\n
\n
\n \ud559\ubc88
\n <\/b>\n<\/td>\n		\n
\n \uc131\uba85
\n <\/b>\n<\/td>\n		\n
\n \ud559\uacfc\uba85
\n <\/b>\n<\/td>\n		\n
\n \ud559\ub144
\n <\/b>\n<\/td>\n		\n
\n \uc5f0\ub77d\ucc98
\n <\/b>\n<\/td>\n		\n
\n \uc774\uba54\uc77c
\n <\/b>\n<\/td>\n<\/tr>\n
\n 20140001\n <\/td>\n\n \uae40\uae30\uc218\n <\/td>\n\n \uacbd\uc601\ud559\uacfc\n <\/td>\n\n 4\n <\/td>\n\n 010-****-****\n <\/td>\n\n dptl1@daum.net\n <\/td>\n<\/tr>\n
\n 20140002\n <\/td>\n\n \uae40\uae30\uc601\n <\/td>\n\n \ubc95\ud559\uacfc\n <\/td>\n\n 4\n <\/td>\n\n 010-****-****\n <\/td>\n\n dptl2@naver.com\n <\/td>\n<\/tr>\n
\n 20140003\n <\/td>\n\n \uae40\uae30\uc804\n <\/td>\n\n \ucef4\ud4e8\ud130\uacf5\ud559\uacfc\n <\/td>\n\n 4\n <\/td>\n\n 010-****-****\n <\/td>\n\n dptl3@gmail.com\n <\/td>\n<\/tr>\n
\n 20140004\n <\/td>\n\n \uae40\uae30\ud0c1\n <\/td>\n\n \ubb3c\ub9ac\ud559\uacfc\n <\/td>\n\n 4\n <\/td>\n\n 010-****-****\n <\/td>\n\n dptl4@naver.com\n <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n
\n \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uad6c\uc870
\n <\/b>\n<\/p>\n

\n \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \uc77c\ub828\uc758 \uc815\ud615\ud654\ub41c \ub9b4\ub808\uc774\uc158(\ud14c\uc774\ube14)\uc73c\ub85c \uad6c\uc131\ub41c \ub370\uc774\ud130 \ud56d\ubaa9\ub4e4\uc758 \uc9d1\ud569\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uac00\uc7a5 \ud070 \uc7a5\uc810\uc740 \uad6c\uc870\uac00 \ub2e8\uc21c\ud558\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0\uc11c \ub9b4\ub808\uc774\uc158(Relation)\uc740 \ud589\uacfc \uc5f4\ub85c \uad6c\uc131\ub41c \ucc28\uc6d0 \ud14c\uc774\ube14\uc744 \ub098\ud0c0\ub0c5\ub2c8\ub2e4. \ud558\ub098\uc758 \ub9b4\ub808\uc774\uc158\uc740 \ud558\ub098\uc758 \uc5d4\ud2f0\ud2f0(Entity)\uc5d0 \uad00\ud55c \ub370\uc774\ud130\ub97c \uc800\uc7a5\ud558\uba70, \uac01 \ub9b4\ub808\uc774\uc158\uc740 \uace0\uc720\ud55c \uc774\ub984\uc744 \uac00\uc9c0\uac8c \ub429\ub2c8\ub2e4. \uc704\uc5d0 \ubcf4\uc774\ub294 \ud45c\ub294 \ud559\uc0dd \uc815\ubcf4\ub97c \uc800\uc7a5\ud558\ub294 \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc785\ub2c8\ub2e4. \ub9b4\ub808\uc774\uc158\uc758 \uac01 \ud589(Row)\uc744 \ud29c\ud50c(Tuple) \ub610\ub294 \ub808\ucf54\ub4dc(Record)\ub77c\uace0 \ud558\ub294\ub370, \uc608\ub97c \ub4e4\uc790\uba74, ‘20140001’, ‘\uae40\uae30\uc218’, ‘\uacbd\uc601\ud559\uacfc’, ‘1’, ‘\uc5f0\ub77d\ucc98’, ‘\uc774\uba54\uc77c’ \ub4f1\uc740 ‘\uae40\uae30\uc218’ \ud559\uc0dd\uc5d0 \uad00\ud55c \uc815\ubcf4\ub97c \ub098\ud0c0\ub0b4\ub294 \ud29c\ud50c\uc785\ub2c8\ub2e4.\n <\/p>\n

\n

\n \ub9b4\ub808\uc774\uc158\uc758 \uac01 \uc5f4(Column)\uc740 \uc18d\uc131(Attribute)\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0\ub294 \ud559\uc0dd\uc758 \uc815\ubcf4\ub97c \ub098\ud0c0\ub0b4\uae30 \uc704\ud574 \ubaa8\ub450 6\uac1c\uc758 \uc18d\uc131\uc744 \uc0ac\uc6a9\ud588\ub294\ub370, \uadf8\uc911 ‘\ud559\ubc88’ \uc18d\uc131\uc740 \ud559\uc0dd\uc758 \ud559\ubc88\uc744 \ub098\ud0c0\ub0b4\ub294 \uc18d\uc131\uc785\ub2c8\ub2e4. \ud55c\ud3b8 \ud558\ub098\uc758 \uc18d\uc131\uc774 \uac00\uc9c8 \uc218 \uc788\ub294 \uac12\uc758 \uc9d1\ud569\uc744 \ub3c4\uba54\uc778(Domain)\uc774\ub77c\uace0 \ud569\ub2c8\ub2e4. \ub9cc\uc57d \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc758 \ud559\uc0dd\uc774 1\ud559\ub144\ubd80\ud130 4\ud559\ub144\uae4c\uc9c0 \uc788\ub2e4\uba74 ‘\ud559\ub144’ \uc18d\uc131\uc5d0 \ub300\ud55c \ub3c4\uba54\uc778\uc740 ‘1, 2, 3, 4’\uac00 \ub418\ub294 \uac83\uc785\ub2c8\ub2e4.\n <\/p>\n

\n

\n \ucc28\uc218(Degree)\ub294 \ud29c\ud50c\uc744 \uad6c\uc131\ud558\ub294 \uc18d\uc131\uc758 \uac1c\uc218\ub97c \uc758\ubbf8\ud569\ub2c8\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0\ub294 \ud559\ubc88, \uc131\uba85, \ud559\uacfc\uba85, \ud559\ub144, \uc5f0\ub77d\ucc98, \uc774\uba54\uc77c\uacfc \uac19\uc774 6\uac1c\uc758 \uc18d\uc131\uc774 \uc874\uc7ac\ud558\ubbc0\ub85c \ucc28\uc218\ub294 6\uc785\ub2c8\ub2e4. \uce74\ub514\ub110\ub9ac\ud2f0(Cardinality)\ub294 \ud29c\ud50c\uc758 \uac1c\uc218\ub97c \uc758\ubbf8\ud558\uba70 \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0\ub294 4\uac1c\uc758 \ud29c\ud50c\uc774 \uc874\uc7ac\ud558\ubbc0\ub85c \uce74\ub514\ub110\ub9ac\ud2f0\ub294 4\uc785\ub2c8\ub2e4.\n <\/p>\n

\n

\n \ub9b4\ub808\uc774\uc158\uc5d0 \ud29c\ud50c\uc744 \uc0bd\uc785\ud560 \ub54c \uc5b4\ub5a4 \uc18d\uc131 \uac12\uc740 \uc815\ud574\uc9c0\uc9c0 \uc54a\uc744 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4. \uc774\uc640 \uac19\uc774 \uc18d\uc131 \uac12\uc774 \uc544\uc9c1 \uc815\ud574\uc9c0\uc9c0 \uc54a\uc558\uac70\ub098 \ud574\ub2f9\ub418\ub294 \uac12\uc774 \uc5c6\uc744 \uacbd\uc6b0\uc5d0\ub294 \ub110(Null) \uac12\uc744 \uc0ac\uc6a9\ud569\ub2c8\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0 \ud559\uc0dd \uc815\ubcf4\ub97c \uc785\ub825\ud560 \ub54c \uc77c\ubd80 \ud559\uc0dd\uc740 \ud734\ub300\ud3f0\uc774 \uc5c6\uc744 \uc218 \uc788\ub294\ub370, \uc774\ub54c \ud559\uc0dd\uc758 ‘\uc5f0\ub77d\ucc98’ \uc18d\uc131\uc744 \ub110 \uac12\uc73c\ub85c \uc785\ub825\ud569\ub2c8\ub2e4.\n <\/p>\n

\n

\n \ud0a4(Key)\ub294 \uac01 \ud29c\ud50c\uc744 \uc720\uc77c\ud558\uac8c \uad6c\ubcc4\ud560 \uc218 \uc788\ub294 \ud558\ub098 \uc774\uc0c1\uc758 \uc18d\uc131 \ubaa8\uc784\uc744 \ub73b\ud569\ub2c8\ub2e4. \uc774\ub54c \ud6c4\ubcf4 \ud0a4(Candidate Key)\ub294 \uac01 \ud29c\ud50c\uc744 \uc720\uc77c\ud558\uac8c \uad6c\ubcc4\ud560 \uc218 \uc788\ub294 \ucd5c\uc18c\ud55c\uc758 \uc18d\uc131\ub4e4\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0\uc11c\ub294 ‘\ud559\ubc88’\uacfc ‘\uc131\uba85, \ud559\uacfc\uba85’ \ub4f1\uc774 \ud6c4\ubcf4 \ud0a4\uc5d0 \ud3ec\ud568\ub429\ub2c8\ub2e4. \uc989 \ud6c4\ubcf4 \ud0a4\ub97c \uad6c\uc131\ud558\ub294 \uc18d\uc131 \uc911\uc5d0\uc11c \uc5b4\ub5a4 \uc18d\uc131\uc744 \uc81c\uc678\ud558\uba74 \uac01 \ud29c\ud50c\uc744 \uc720\uc77c\ud558\uac8c \uad6c\ubcc4\ud558\ub294 \ub2a5\ub825\uc744 \uc0c1\uc2e4\ud558\uac8c \ub429\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc790\uba74, \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc758 \ud6c4\ubcf4 \ud0a4(\uc131\uba85, \ud559\uacfc\uba85)\uc5d0\uc11c ‘\ud559\uacfc\uba85’ \uc18d\uc131\uc744 \uc81c\uc678\ud558\uba74 \uc774\ub984\uc740 \uac19\uace0 \uc18c\uc18d \ud559\uacfc\uac00 \ub2e4\ub978 \ud559\uc0dd\ub4e4\uc774 \uc788\uae30 \ub54c\ubb38\uc5d0 \uac01 \ud29c\ud50c\uc744 \uad6c\ubcc4\ud560 \uc218 \uc5c6\uac8c \ub429\ub2c8\ub2e4.\n <\/p>\n

\n

\n \ud6c4\ubcf4 \ud0a4\uac00 \ub450 \uac1c \uc774\uc0c1\uc774\uba74 \uc774 \uc911 \ud558\ub098\ub97c \uae30\ubcf8 \ud0a4(Primary Key)\ub85c \uc120\uc815\ud574\uc57c \ud569\ub2c8\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158\uc5d0\uc11c \ud6c4\ubcf4 \ud0a4\ub294 ‘\ud559\ubc88’\uacfc ‘\uc131\uba85, \ud559\uacfc\uba85’\uc774\uace0, \uc774 \uc911\uc5d0\uc11c ‘\ud559\ubc88’\uc744 \uae30\ubcf8 \ud0a4\ub85c \uc120\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub54c \uae30\ubcf8 \ud0a4\uac00 \uc544\ub2cc \ud6c4\ubcf4 \ud0a4\ub294 \ub300\uccb4 \ud0a4(Alternate Key)\ub77c\uace0 \ud569\ub2c8\ub2e4. \uc678\ub798 \ud0a4(Foreign Key)\ub294 \uc544\ub798\uc758 \uc774\ubbf8\uc9c0\uc640 \uac19\uc774 \ub2e4\ub978 \ub9b4\ub808\uc774\uc158\uc758 \uae30\ubcf8 \ud0a4\ub97c \ucc38\uc870\ud558\uba70, \ub9b4\ub808\uc774\uc158\uacfc \ub9b4\ub808\uc774\uc158 \uac04\uc758 \uad00\uacc4\ub97c \ub098\ud0c0\ub0b4\ub294 \uc5ed\ud560\uc744 \ud569\ub2c8\ub2e4.\n <\/p>\n

\n
\n
\n<\/span>
\n \uae30\ubcf8 \ud0a4\uc640 \uc678\ub798 \ud0a4
\n <\/figcaption><\/figure>\n<\/p>\n

\n

\n

\n
\n \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74(Integrity Constraint)
\n <\/b>\n<\/p>\n

\n \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74\uc740 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc0c1\ud0dc\uac00 \ub9cc\uc871\ud574\uc57c \ud558\ub294 \uc870\uac74\uc73c\ub85c\uc11c \uc0ac\uc6a9\uc790\uc5d0 \uc758\ud55c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uac31\uc2e0\uc774 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uc77c\uad00\uc131\uc744 \uc190\uc0c1\ud558\uc9c0 \uc54a\ub3c4\ub85d \ubcf4\uc7a5\ud558\ub294 \uc218\ub2e8\uc785\ub2c8\ub2e4. \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74\uc740 \uc2a4\ud0a4\ub9c8\ub97c \uc815\uc758\ud560 \ub54c \ud55c \ubc88\ub9cc \uba85\uc2dc\ud574\ub193\uc73c\uba74 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uac31\uc2e0\ub420 \ub54c\ub9c8\ub2e4 DBMS\uac00 \uc790\ub3d9\uc73c\ub85c \uac80\uc0ac\ud569\ub2c8\ub2e4. \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8\uc774 \uc77c\uc77c\uc774 \uac80\uc0ac\ud560 \ud544\uc694\uac00 \uc5c6\uae30 \ub54c\ubb38\uc5d0 \uc544\uc8fc \ud3b8\ub9ac\ud569\ub2c8\ub2e4. \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74\uc740 \ub3c4\uba54\uc778 \uc81c\uc57d \uc870\uac74, \uac1c\uccb4 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74, \ucc38\uc870 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74\uc73c\ub85c \uad6c\ubd84\ub429\ub2c8\ub2e4.\n <\/p>\n

\n

\n
\n \ub3c4\uba54\uc778 \uc81c\uc57d \uc870\uac74
\n <\/b>\n<\/p>\n

\n \uac01 \uc18d\uc131\uc758 \uac12\uc740 \ubc18\ub4dc\uc2dc \ub3c4\uba54\uc778\uc5d0 \uc18d\ud55c \ud558\ub098\uc758 \uac12\uc744 \uac00\uc838\uc57c \ud55c\ub2e4\ub294 \uac83\uc73c\ub85c, \uc18d\uc131\uc758 \uae30\ubcf8(Default) \uac12\uacfc \uac00\ub2a5\ud55c \uac12\ub4e4\uc758 \ubc94\uc704, \ub110(Null) \uac12\uc758 \ud5c8\uc6a9 \uc5ec\ubd80 \ub4f1\uc744 \uc9c0\uc815\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4. \uc608\ub97c \ub4e4\uc5b4 ‘\ud2b9\uae30’ \uc18d\uc131\uc758 \ub3c4\uba54\uc778\uc774 [\uc6b4\ub3d9, \ub3c5\uc11c]\ub77c\uba74 ‘\ud2b9\uae30’ \uc18d\uc131\uc758 \uac12\uc740 2\uac00\uc9c0 \uc911 \ud558\ub098\ub9cc \uac00\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n <\/p>\n

\n

\n
\n \uac1c\uccb4 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74
\n <\/b>\n<\/p>\n

\n \ub9b4\ub808\uc774\uc158\uc5d0 \uc800\uc7a5\ub41c \ud29c\ud50c\ub4e4\uc744 \uc2dd\ubcc4\ud558\uae30 \uc704\ud574\uc11c\ub294 \uae30\ubcf8 \ud0a4\ub97c \uad6c\uc131\ud558\ub294 \uc5b4\ub5a4 \uc18d\uc131\ub3c4 \ub110(Null) \uac12\uc744 \uac00\uc9c8 \uc218 \uc5c6\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4.\n <\/p>\n

\n

\n
\n \ucc38\uc870 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74
\n <\/b>\n<\/p>\n

\n \ucc38\uc870 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74\uc740 \uc678\ub798 \ud0a4\uc5d0 \ub300\ud55c \uc81c\uc57d \uc870\uac74\uc73c\ub85c \uc678\ub798 \ud0a4\uc758 \uac12\uc740 \ucc38\uc870\ub41c \ub9b4\ub808\uc774\uc158\uc758 \uae30\ubcf8 \ud0a4 \uac12\uacfc \uac19\uc544\uc57c \ud55c\ub2e4\ub294 \uac83\uc785\ub2c8\ub2e4. \uc544\ub798\uc758 \uc774\ubbf8\uc9c0\uc5d0\uc11c Employee \ub9b4\ub808\uc774\uc158\uc758 ‘\ubc1c\ub9e4 \ubc88\ud638’\ub294 Department \ub9b4\ub808\uc774\uc158\uc758 \uae30\ubcf8 \ud0a4\uc778 ‘\ubc1c\ub9e4 \ubc88\ud638’\ub97c \ucc38\uc870\ud558\ub294 \uc678\ub798 \ud0a4\uc785\ub2c8\ub2e4. \uadf8\ub7ec\ubbc0\ub85c Employee \ub9b4\ub808\uc774\uc158\uc758 ‘\ubc1c\ub9e4 \ubc88\ud638’\uc5d0\ub294 Department \ub9b4\ub808\uc774\uc158\uc758 ‘\ubc1c\ub9e4 \ubc88\ud638’\uc5d0 \uc788\ub294 \uac12\ub9cc \ub098\ud0c0\ub0a0 \uc218 \uc788\uc2b5\ub2c8\ub2e4. Employee \ub9b4\ub808\uc774\uc158\uc758 ‘\ubc1c\ub9e4 \ubc88\ud638’\ub294 \uae30\ubcf8 \ud0a4\uac00 \uc544\ub2c8\ubbc0\ub85c \ub110(Null) \uac12\uc744 \uac00\uc9c8 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\n <\/p>\n

\n
\n
\n<\/span>
\n \ucc38\uc870 \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74 \uc608\uc2dc
\n <\/figcaption><\/figure>\n<\/p>\n

\n

\n

\n
\n \uad00\uacc4\ud615 \ub300\uc218(Relational Algebra)
\n <\/b>\n<\/p>\n

\n \uad00\uacc4\ud615 \ub300\uc218\ub294 \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0 \ub370\uc774\ud130\ub97c \uc0bd\uc785\ud558\uace0, \uc800\uc7a5\ub41c \ub370\uc774\ud130\ub97c \uac80\uc0c9, \uc218\uc815, \uc0ad\uc81c\ud558\ub294 \ub4f1\uc758 \uae30\ub2a5\uc744 \uc218\ud589\ud558\ub294 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub300\uc218\ub294 \uc8fc\uc5b4\uc9c4 \ub9b4\ub808\uc774\uc158\uc5d0 \uc5f0\uc0b0\uc790\ub97c \uc801\uc6a9\ud558\uc5ec \uc0c8\ub85c\uc6b4 \ub9b4\ub808\uc774\uc158\uc744 \uc0dd\uc131\ud569\ub2c8\ub2e4. \uc5f0\uc0b0 \uacb0\uacfc \uc0dd\uc131\ub41c \ub9b4\ub808\uc774\uc158\uc740 \ub610 \ub2e4\ub978 \uc5f0\uc0b0\uc758 \uc785\ub825\uc73c\ub85c \uc0ac\uc6a9\ub418\uae30\ub3c4 \ud569\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub300\uc218\ub294 \uc0ac\uc6a9\uc790\uac00 \uc6d0\ud558\ub294 \ub370\uc774\ud130\uac00 \ubb34\uc5c7(What)\uc778\uc9c0\uc640 \uac80\uc0c9 \ubc29\ubc95(How)\uae4c\uc9c0 \uae30\uc220\ud558\ubbc0\ub85c \uc808\ucc28\uc801 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub300\uc218\ub294 SQL\uc758 \uc774\ub860\uc801 \uae30\ucd08\ub85c, SQL\uc744 \uad6c\ud604\ud558\uace0 \ucd5c\uc801\ud654\ud558\uae30 \uc704\ud55c DBMS\uc758 \ub0b4\ubd80 \uc5b8\uc5b4\ub85c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.\n <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

\ub370\uc774\ud0c0\ubca0\uc774\uc2a4(Database) \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub780? \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\ub294 \uad00\uacc4\ud615 \ub370\uc774\ud130 \ubaa8\ub378\uc744 \uae30\ubc18\uc73c\ub85c \ud604\uc7ac \uac00\uc7a5 \ub9ce\uc774 \uc0ac\uc6a9\ub418\ub294 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc785\ub2c8\ub2e4. \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \uad6c\uc870, \ubb34\uacb0\uc131 \uc81c\uc57d \uc870\uac74, \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uac00 \uc81c\uacf5\ud558\ub294 \uad00\uacc4\ud615 \ub300\uc218 \uc5f0\uc0b0\uc5d0 \ub300\ud574 \uc54c\uc544\ubd05\uc2dc\ub2e4. \ud559\uc0dd \ub9b4\ub808\uc774\uc158 \uc608\uc2dc \ud559\ubc88 \uc131\uba85 \ud559\uacfc\uba85 \ud559\ub144 \uc5f0\ub77d\ucc98 \uc774\uba54\uc77c 20140001 \uae40\uae30\uc218 \uacbd\uc601\ud559\uacfc 4 010-****-**** dptl1@daum.net 20140002 \uae40\uae30\uc601 \ubc95\ud559\uacfc 4 010-****-**** dptl2@naver.com 20140003 \uae40\uae30\uc804 \ucef4\ud4e8\ud130\uacf5\ud559\uacfc 4 010-****-**** dptl3@gmail.com…<\/p>\n","protected":false},"author":1,"featured_media":398,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/399"}],"collection":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=399"}],"version-history":[{"count":1,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/399\/revisions"}],"predecessor-version":[{"id":400,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/399\/revisions\/400"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/media\/398"}],"wp:attachment":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}