{"id":479111,"date":"2023-08-09T10:01:33","date_gmt":"2023-08-09T10:01:33","guid":{"rendered":""},"modified":"2023-09-05T11:18:12","modified_gmt":"2023-09-05T11:18:12","slug":"sql","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/kr\/wiki\/sql\/","title":{"rendered":"SQL"},"content":{"rendered":"<p>SQL\uc5d0 \ub300\ud55c \uac04\ub7b5\ud55c \uc815\ubcf4<\/p>\n<p>SQL(Structured Query Language)\uc740 \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc758 \ub370\uc774\ud130\ub97c \uad00\ub9ac\ud558\uae30 \uc704\ud574 \uc124\uacc4\ub41c \ub3c4\uba54\uc778\ubcc4 \uc5b8\uc5b4\uc785\ub2c8\ub2e4. \uc774\ub294 \ub370\uc774\ud130 \ucffc\ub9ac, \uc5c5\ub370\uc774\ud2b8 \ubc0f \uc870\uc791\uacfc \uac19\uc740 \uc791\uc5c5\uc5d0 \uc0ac\uc6a9\ub418\ubbc0\ub85c \uc0ac\uc6a9\uc790\ub294 \uccb4\uacc4\uc801\uc774\uace0 \ud6a8\uc728\uc801\uc778 \ubc29\uc2dd\uc73c\ub85c \ub300\uaddc\ubaa8 \uc815\ubcf4 \uc138\ud2b8\uc640 \uc0c1\ud638 \uc791\uc6a9\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>SQL\uc758 \uc5ed\uc0ac\uc640 \uccab \ubc88\uc9f8 \uc5b8\uae09<\/h2>\n<p>SQL\uc758 \uae30\uc6d0\uc5d0 \ub300\ud55c \uc5ed\uc0ac\ub294 1970\ub144\ub300\ub85c \uac70\uc2ac\ub7ec \uc62c\ub77c\uac04\ub2e4. IBM \uc5f0\uad6c\uc6d0\uc778 Raymond Boyce\uc640 Donald Chamberlin\uc740 IBM\uc758 San Jose Research Laboratory\uc5d0\uc11c \ucc98\uc74c\uc73c\ub85c SQL\uc744 \uac1c\ubc1c\ud588\uc2b5\ub2c8\ub2e4. \ucc98\uc74c\uc5d0\ub294 SEQUEL(Structured English Query Language)\uc774\ub77c\uace0 \ubd88\ub838\uc9c0\ub9cc \ub098\uc911\uc5d0 SQL\ub85c \ubcc0\uacbd\ub418\uc5c8\uc2b5\ub2c8\ub2e4.<\/p>\n<p>SQL\uc758 \ucd5c\ucd08 \uc0c1\uc6a9 \uad6c\ud604\uc740 1979\ub144 Oracle Corporation\uc5d0\uc11c \ucd9c\uc2dc\ub418\uc5c8\uc2b5\ub2c8\ub2e4. SQL\uc758 \ud45c\uc900\ud654\ub294 1986\ub144\uc5d0 \uc2dc\uc791\ub418\uc5b4 \uc2dc\uac04\uc774 \uc9c0\ub0a8\uc5d0 \ub530\ub77c \uc5ec\ub7ec \ubc84\uc804\uacfc \uac1c\uc791\uc774 \uc774\ub8e8\uc5b4\uc84c\uc2b5\ub2c8\ub2e4.<\/p>\n<h2>SQL\uc5d0 \ub300\ud55c \uc790\uc138\ud55c \uc815\ubcf4: \uc8fc\uc81c \ud655\uc7a5<\/h2>\n<p>SQL\uc740 \uad00\uacc4\ud615 \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc640 \uc0c1\ud638 \uc791\uc6a9\ud558\uae30 \uc704\ud55c \uc0ac\uc2e4\uc0c1\uc758 \ud45c\uc900\uc774 \ub418\uc5c8\uc2b5\ub2c8\ub2e4. \uc774\ub97c \ud1b5\ud574 \uc0ac\uc6a9\uc790\ub294 \ub2e4\uc74c\uacfc \uac19\uc740 \ub2e4\uc591\ud55c \uc791\uc5c5\uc744 \uc2e4\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li>\ub370\uc774\ud130 \ucffc\ub9ac<\/li>\n<li>\uc0c8 \ub808\ucf54\ub4dc \uc0bd\uc785<\/li>\n<li>\uae30\uc874 \uae30\ub85d \uc5c5\ub370\uc774\ud2b8<\/li>\n<li>\uae30\ub85d \uc0ad\uc81c<\/li>\n<li>\ud14c\uc774\ube14 \ubc0f \uae30\ud0c0 \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uac1c\uccb4 \uc0dd\uc131, \ubcc0\uacbd \ubc0f \uc0ad\uc81c<\/li>\n<\/ul>\n<h3>SQL \uad6c\ubb38 \ubc0f \uba85\ub839<\/h3>\n<p>SQL \uba85\ub839\uc740 \uc5ec\ub7ec \ubc94\uc8fc\ub85c \ubd84\ub958\ub429\ub2c8\ub2e4.<\/p>\n<ul>\n<li>DDL(\ub370\uc774\ud130 \uc815\uc758 \uc5b8\uc5b4): CREATE, ALTER, DROP<\/li>\n<li>DML(\ub370\uc774\ud130 \uc870\uc791 \uc5b8\uc5b4): SELECT, INSERT, UPDATE, DELETE<\/li>\n<li>DCL(\ub370\uc774\ud130 \uc81c\uc5b4 \uc5b8\uc5b4): GRANT, REVOKE<\/li>\n<\/ul>\n<h2>SQL\uc758 \ub0b4\ubd80 \uad6c\uc870: SQL \uc791\ub3d9 \ubc29\uc2dd<\/h2>\n<p>SQL\uc740 \ucffc\ub9ac \ubb38\uc744 \uad6c\ubb38 \ubd84\uc11d\ud558\uace0 \ud574\uc11d\ud558\uc5ec \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc774 \uc2e4\ud589\ud560 \uc218 \uc788\ub294 \uc791\uc5c5\uc73c\ub85c \ubcc0\ud658\ud558\ub294 \ubc29\uc2dd\uc73c\ub85c \uc791\ub3d9\ud569\ub2c8\ub2e4. \uc77c\ubc18\uc801\uc73c\ub85c \uc791\ub3d9\ud558\ub294 \ubc29\ubc95\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<ol>\n<li><strong>\uad6c\ubb38 \ubd84\uc11d:<\/strong> SQL \ubb38\uc740 \ubd84\uc11d\ub418\uc5b4 \uc5ec\ub7ec \ubd80\ubd84\uc73c\ub85c \ub098\ub204\uc5b4\uc9d1\ub2c8\ub2e4.<\/li>\n<li><strong>\ucd5c\uc801\ud654:<\/strong> \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc5d4\uc9c4\uc740 \ucffc\ub9ac\ub97c \uc2e4\ud589\ud558\ub294 \ub2e4\uc591\ud55c \ubc29\ubc95\uc744 \ud3c9\uac00\ud558\uc5ec \uac00\uc7a5 \ud6a8\uc728\uc801\uc778 \uacbd\ub85c\ub97c \uc120\ud0dd\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uc2e4\ud589:<\/strong> \ucd5c\uc801\ud654\ub41c \ucffc\ub9ac\uac00 \uc2e4\ud589\ub418\uc5b4 \uc694\uccad\ub41c \ub300\ub85c \ub370\uc774\ud130\ub97c \uac80\uc0c9\ud558\uac70\ub098 \uc870\uc791\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uacb0\uacfc:<\/strong> \uacb0\uacfc\ub294 \ud074\ub77c\uc774\uc5b8\ud2b8 \uc560\ud50c\ub9ac\ucf00\uc774\uc158\uc73c\ub85c \ub2e4\uc2dc \uc804\uc1a1\ub429\ub2c8\ub2e4.<\/li>\n<\/ol>\n<h2>SQL\uc758 \uc8fc\uc694 \uae30\ub2a5 \ubd84\uc11d<\/h2>\n<ul>\n<li><strong>\uac04\ub2e8:<\/strong> SQL\uc740 \uc601\uc5b4\uc5d0 \uac00\uae4c\uc6b4 \uad6c\ubb38\uc744 \ub530\ub985\ub2c8\ub2e4.<\/li>\n<li><strong>\uc774\uc2dd\uc131:<\/strong> SQL\uc740 \ub2e4\uc591\ud55c \ub370\uc774\ud130\ubca0\uc774\uc2a4 \uc2dc\uc2a4\ud15c\uc5d0\uc11c \uc0ac\uc6a9\ub429\ub2c8\ub2e4.<\/li>\n<li><strong>\uc77c\uad00\uc131:<\/strong> SQL \ud45c\uc900\uc740 \ub2e4\uc591\ud55c \ud50c\ub7ab\ud3fc\uc5d0\uc11c \uc77c\uad00\ub41c \uc811\uadfc \ubc29\uc2dd\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ub2a5\ub960:<\/strong> \uc774\ub97c \ud1b5\ud574 \ub300\uaddc\ubaa8 \ub370\uc774\ud130 \uc138\ud2b8\uc5d0 \ube60\ub974\uac8c \uc561\uc138\uc2a4\ud558\uace0 \uc870\uc791\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>SQL \uc720\ud615: \ud14c\uc774\ube14\uacfc \ubaa9\ub85d\uc744 \uc0ac\uc6a9\ud558\uc5ec \uc791\uc131<\/h2>\n<p>\ub2e4\uc591\ud55c \uae30\ub2a5\uc744 \uae30\ubc18\uc73c\ub85c \ud558\ub294 \ub2e4\uc591\ud55c \uc720\ud615\uc758 SQL\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc5ec\uae30\uc5d0\ub294 \ub2e4\uc74c\uc774 \ud3ec\ud568\ub429\ub2c8\ub2e4.<\/p>\n<table>\n<thead>\n<tr>\n<th>\uc720\ud615<\/th>\n<th>\uc124\uba85<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>ANSI SQL<\/td>\n<td>ANSI\uc5d0\uc11c \uc815\uc758\ud55c \ud45c\uc900 SQL<\/td>\n<\/tr>\n<tr>\n<td>T-SQL<\/td>\n<td>Microsoft SQL Server\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 SQL \ud655\uc7a5<\/td>\n<\/tr>\n<tr>\n<td>PL\/SQL<\/td>\n<td>SQL\uc5d0 \ub300\ud55c Oracle\uc758 \uc808\ucc28\uc801 \ud655\uc7a5<\/td>\n<\/tr>\n<tr>\n<td>MySQL SQL<\/td>\n<td>MySQL\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 SQL \ubc84\uc804<\/td>\n<\/tr>\n<tr>\n<td>\ud3ec\uc2a4\ud2b8\uadf8\ub808SQL SQL<\/td>\n<td>PostgreSQL\uc5d0\uc11c \uc0ac\uc6a9\ub418\ub294 SQL \ubc84\uc804<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>SQL\uc758 \uc0ac\uc6a9\ubc29\ubc95\uacfc \uc0ac\uc6a9\uc5d0 \ub530\ub978 \ubb38\uc81c\uc810 \ubc0f \ud574\uacb0\ubc29\ubc95<\/h2>\n<h3>\uc6a9\ub3c4<\/h3>\n<ul>\n<li><strong>\ub370\uc774\ud130 \uac80\uc0c9:<\/strong> \ub370\uc774\ud130\ubca0\uc774\uc2a4\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uac80\uc0c9\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ub370\uc774\ud130 \uc870\uc791:<\/strong> \ub370\uc774\ud130 \uc0bd\uc785, \uc5c5\ub370\uc774\ud2b8 \ub610\ub294 \uc0ad\uc81c.<\/li>\n<li><strong>\uad00\ub9ac:<\/strong> \uc0ac\uc6a9\uc790 \uad8c\ud55c \uad00\ub9ac, \ub370\uc774\ud130\ubca0\uc774\uc2a4 \ucd5c\uc801\ud654.<\/li>\n<\/ul>\n<h3>\ubb38\uc81c \ubc0f \ud574\uacb0 \ubc29\ubc95<\/h3>\n<ul>\n<li><strong>\uc131\ub2a5 \ubb38\uc81c:<\/strong> \ucffc\ub9ac \ucd5c\uc801\ud654, \uc778\ub371\uc2f1\uc73c\ub85c \ud574\uacb0\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/li>\n<li><strong>\ubcf4\uc548 \ubb38\uc81c:<\/strong> \uc801\uc808\ud55c \uad8c\ud55c \ubc0f \uc778\uc99d\uc744 \uad6c\ud604\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ud638\ud658\uc131:<\/strong> \ucf54\ub4dc\uac00 \ud2b9\uc815 SQL \uc5b8\uc5b4\uc5d0 \ub9de\uac8c \uc870\uc815\ub418\uc5c8\ub294\uc9c0 \ud655\uc778\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>\uc8fc\uc694 \ud2b9\uc9d5 \ubc0f \uae30\ud0c0 \uc720\uc0ac \uc6a9\uc5b4\uc640\uc758 \ube44\uad50<\/h2>\n<table>\n<thead>\n<tr>\n<th>\ud615\uc9c8<\/th>\n<th>SQL<\/th>\n<th>NoSQL<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\ub370\uc774\ud130 \ubaa8\ub378<\/td>\n<td>\uad00\uacc4\ud615<\/td>\n<td>\ube44\uad00\uacc4\ud615<\/td>\n<\/tr>\n<tr>\n<td>\ud655\uc7a5\uc131<\/td>\n<td>\uc218\uc9c1\uc758<\/td>\n<td>\uc218\ud3c9\uc758<\/td>\n<\/tr>\n<tr>\n<td>\uc77c\uad00\uc131<\/td>\n<td>\uc0b0<\/td>\n<td>\uc885\uc885 \uacb0\uad6d<\/td>\n<\/tr>\n<tr>\n<td>\ubcf5\uc7a1\uc131<\/td>\n<td>\ubcf4\ud1b5\uc758<\/td>\n<td>\ub2e4\uc591\ud568<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>SQL\uacfc \uad00\ub828\ub41c \ubbf8\ub798\uc758 \uad00\uc810\uacfc \uae30\uc220<\/h2>\n<p>SQL\uacfc \uad00\ub828\ub41c \ubbf8\ub798 \uae30\uc220\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ube45\ub370\uc774\ud130 \ud1b5\ud569:<\/strong> \ube45\ub370\uc774\ud130 \ubd84\uc11d\uc5d0 SQL\uc744 \ud65c\uc6a9\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\uae30\uacc4 \ud559\uc2b5 \ud1b5\ud569:<\/strong> SQL \uae30\ubc18 ML \uc54c\uace0\ub9ac\uc998.<\/li>\n<li><strong>\ud074\ub77c\uc6b0\ub4dc \uae30\ubc18 SQL \uc11c\ube44\uc2a4:<\/strong> \ud074\ub77c\uc6b0\ub4dc \ud638\uc2a4\ud305 SQL \uc194\ub8e8\uc158\uc758 \ucd94\uac00 \uac1c\ubc1c.<\/li>\n<\/ul>\n<h2>\ud504\ub85d\uc2dc \uc11c\ubc84\ub97c SQL\uacfc \uc0ac\uc6a9\ud558\uac70\ub098 \uc5f0\uacb0\ud558\ub294 \ubc29\ubc95<\/h2>\n<p>OneProxy\uc5d0\uc11c \uc81c\uacf5\ud558\ub294 \uac83\uacfc \uac19\uc740 \ud504\ub85d\uc2dc \uc11c\ubc84\ub294 \ub2e4\uc74c\uc744 \ud1b5\ud574 SQL \ud658\uacbd\uc5d0\uc11c \uc5ed\ud560\uc744 \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>\n<ul>\n<li><strong>\ubcf4\uc548 \uac15\ud654:<\/strong> IP \uc8fc\uc18c\ub97c \ub9c8\uc2a4\ud0b9\ud558\uace0 \ub370\uc774\ud130\ub97c \uc554\ud638\ud654\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ub85c\ub4dc \ubc38\ub7f0\uc2f1:<\/strong> \uc5ec\ub7ec \uc11c\ubc84\uc5d0 SQL \ucffc\ub9ac\ub97c \ubc30\ud3ec\ud569\ub2c8\ub2e4.<\/li>\n<li><strong>\ubaa8\ub2c8\ud130\ub9c1 \ubc0f \ub85c\uae45:<\/strong> \uac10\uc0ac \ubc0f \uc131\ub2a5 \ubd84\uc11d\uc744 \uc704\ud574 SQL \ucffc\ub9ac\ub97c \ucd94\uc801\ud569\ub2c8\ub2e4.<\/li>\n<\/ul>\n<h2>\uad00\ub828\ub41c \ub9c1\ud06c\ub4e4<\/h2>\n<ul>\n<li><a href=\"https:\/\/www.w3schools.com\/sql\/\" target=\"_new\" rel=\"noopener nofollow\">W3Schools SQL \ud29c\ud1a0\ub9ac\uc5bc<\/a><\/li>\n<li><a href=\"https:\/\/www.iso.org\/standard\/63555.html\" target=\"_new\" rel=\"noopener nofollow\">SQL \ud45c\uc900 \ubb38\uc11c<\/a><\/li>\n<li><a href=\"https:\/\/oneproxy.pro\/kr\/\" target=\"_new\" rel=\"noopener\">OneProxy \uc11c\ube44\uc2a4<\/a><\/li>\n<\/ul>\n<p>\uc774 \ubb38\uc11c\uc758 \ubaa9\uc801\uc740 SQL, SQL\uc758 \uc5ed\uc0ac\uc801 \ubc30\uacbd, \ub0b4\ubd80 \uad6c\uc870, \uc720\ud615, \uc0ac\uc6a9 \uc0ac\ub840 \ubc0f \ud5a5\ud6c4 \uc804\ub9dd\uc5d0 \ub300\ud55c \ud3ec\uad04\uc801\uc778 \uc815\ubcf4\uc640 SQL\uc774 OneProxy\uc640 \uac19\uc740 \ud504\ub85d\uc2dc \uc11c\ubc84\uc640 \uc5f0\uacb0\ub420 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud558\ub294 \uac83\uc785\ub2c8\ub2e4.<\/p>","protected":false},"featured_media":470588,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-479111","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>SQL: Structured Query Language<\/mark>","faq_items":[{"question":"What is SQL and what is it used for?","answer":"<p>SQL, or Structured Query Language, is a domain-specific language designed to manage data in relational databases. It allows users to query, update, and manipulate data, making it an essential tool for handling large sets of information systematically.<\/p>"},{"question":"What is the history of SQL?","answer":"<p>The origin of SQL dates back to the 1970s when IBM researchers Raymond Boyce and Donald Chamberlin developed it. Initially named SEQUEL, it was later changed to SQL. The first commercial implementation was by Oracle Corporation in 1979, and standardization began in 1986.<\/p>"},{"question":"How does SQL work internally?","answer":"<p>SQL operates by parsing and interpreting query statements and translating them into operations the database engine can execute. It involves parsing, optimization, execution, and returning the result to the client application.<\/p>"},{"question":"What are the key features of SQL?","answer":"<p>The key features of SQL include its simplicity, portability across different database systems, consistency due to standardized approaches, and efficiency in handling large data sets.<\/p>"},{"question":"What types of SQL exist?","answer":"<p>Types of SQL include ANSI SQL (standard), T-SQL (Microsoft SQL Server), PL\/SQL (Oracle), MySQL SQL, and PostgreSQL SQL. They cater to different functionalities and systems.<\/p>"},{"question":"What are some common ways to use SQL and associated problems?","answer":"<p>SQL is used for data retrieval, manipulation, and administration. Common problems include performance issues, security concerns, and compatibility challenges. Solutions often involve query optimization, proper permissions, and code adaptation to specific SQL dialects.<\/p>"},{"question":"How does SQL compare to NoSQL?","answer":"<p>SQL follows a relational data model, scales vertically, and adheres to ACID consistency. NoSQL follows a non-relational model, scales horizontally, and often has eventual consistency. The complexity in SQL is moderate, whereas NoSQL varies.<\/p>"},{"question":"What are the future perspectives related to SQL?","answer":"<p>The future of SQL includes big data integration, machine learning integration, and the development of cloud-hosted SQL solutions, shaping the next generation of data analytics and management.<\/p>"},{"question":"How can proxy servers like OneProxy be used with SQL?","answer":"<p>Proxy servers like OneProxy enhance security by masking IP addresses and encrypting data. They also aid in load balancing by distributing SQL queries among several servers and provide monitoring and logging for performance analysis and auditing.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki\/479111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/wiki\/479111\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/media\/470588"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/kr\/wp-json\/wp\/v2\/media?parent=479111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}