{"id":196,"date":"2023-05-16T11:49:38","date_gmt":"2023-05-16T11:49:38","guid":{"rendered":"https:\/\/itnotes.apjsoftwares.com\/?p=196"},"modified":"2023-05-16T11:49:39","modified_gmt":"2023-05-16T11:49:39","slug":"introduction-to-files-and-database-design","status":"publish","type":"post","link":"https:\/\/itnotes.apjsoftwares.in\/index.php\/2023\/05\/16\/introduction-to-files-and-database-design\/","title":{"rendered":"\u00a0Introduction to files and database design"},"content":{"rendered":"\n<p><strong>File:&nbsp;<\/strong><\/p>\n\n\n\n<p>File is a collection of records which are logically related to any object. Record value can be in any form like data.&nbsp;<\/p>\n\n\n\n<p>For eg. : Each student records having values of Roll no, Name, Class. For arranging data we use files.&nbsp;<\/p>\n\n\n\n<p><strong>Types of files:<\/strong><\/p>\n\n\n\n<p><strong>Physical file:<\/strong>&nbsp;<\/p>\n\n\n\n<ul>\n<li>Physical file concern with actual data that is stored.&nbsp;<\/li>\n\n\n\n<li>It stores description about how the data is to be represented.<\/li>\n<\/ul>\n\n\n\n<p><strong>Logical file<\/strong><\/p>\n\n\n\n<ul>\n<li>Logical file: do not contain data.&nbsp;<\/li>\n\n\n\n<li>They contain a description of records that are found in one or more physical files.&nbsp;<\/li>\n\n\n\n<li>A logical file is a view or representation of one or more physical files.<\/li>\n<\/ul>\n\n\n\n<p><strong>Special character file:&nbsp;<\/strong><\/p>\n\n\n\n<ul>\n<li>At the time of file creation we insert some special characters in the file.&nbsp;<\/li>\n\n\n\n<li>For eg: Control + z for end of a file which having ASCII value 26<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>File:&nbsp; File is a collection of records which are logically related to any object. Record&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[],"_links":{"self":[{"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/posts\/196"}],"collection":[{"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/comments?post=196"}],"version-history":[{"count":1,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/posts\/196\/revisions"}],"predecessor-version":[{"id":197,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/posts\/196\/revisions\/197"}],"wp:attachment":[{"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/media?parent=196"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/categories?post=196"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itnotes.apjsoftwares.in\/index.php\/wp-json\/wp\/v2\/tags?post=196"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}