{"id":547,"date":"2017-09-07T09:50:55","date_gmt":"2017-09-07T13:50:55","guid":{"rendered":"https:\/\/folvera.commons.gc.cuny.edu\/?p=547"},"modified":"2021-09-16T14:58:03","modified_gmt":"2021-09-16T18:58:03","slug":"database-administration-fundamentals-sf17sql1001-day-3","status":"publish","type":"post","link":"https:\/\/folvera.commons.gc.cuny.edu\/?p=547","title":{"rendered":"Database Administration Fundamentals (SF17SQL1001) – Day 3"},"content":{"rendered":"

We started working with built-in functions<\/a>.<\/p>\n

“In information technology, the term function (pronounced FUHNK-shun) has a number of meanings. It’s taken from the Latin ‘functio’ — to perform.
\n1) In its most general use, a function is what a given entity does in being what it is.
\n2) In C language and other programming, a function is a named procedure that performs a distinct service. The language statement that requests the function is called a function call, Programming languages usually come with a compiler and a set of ‘canned’ functions that a programmer can specify by writing language statements. These provided functions are sometimes referred to as library routines. Some functions are self-sufficient and can return results to the requesting program without help. Other functions need to make requests of the operating system in order to perform their work.
\n3) In mathematics, a function is a relationship between two variables called the independent variable and the dependent variable. The dependent variable has at most one value for any specific value of the independent variable. A function is usually symbolized by a lowercase, italicized letter of the alphabet, followed by the independent variable in parentheses. For example, the expression y = f ( x ), read ‘y equals f of x,’ means that a dependent variable y is a function of the independent variable x, Functions are often graphed, and they usually appear as lines or curves on a coordinate plane.
\n4) In a hardware device, a function is one complete physical movement that has a discernible consequence relative to the device’s purposes. In a printer, for example, this might be a carriage return or a line feed.”<\/em>
\nhttp:\/\/whatis.techtarget.com\/definition\/function<\/a><\/p><\/blockquote>\n

Download the\u00a0class notes<\/a>\u00a0for day 3.<\/p>\n","protected":false},"excerpt":{"rendered":"

We started working with built-in functions. “In information technology, the term function (pronounced FUHNK-shun) has a number of meanings. It’s taken from the Latin ‘functio’ — to perform. 1) In its most general use, a function is what a given entity does in being what it is. 2) In C language and other programming, a […]<\/p>\n","protected":false},"author":7213,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"send_to_group_blog":0,"footnotes":""},"categories":[20,3,1,17,2],"tags":[],"class_list":["post-547","post","type-post","status-publish","format-standard","hentry","category-sf17sql1001","category-computer-programming","category-cuny","category-open-source","category-sql"],"_links":{"self":[{"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/posts\/547","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/users\/7213"}],"replies":[{"embeddable":true,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=547"}],"version-history":[{"count":2,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/posts\/547\/revisions"}],"predecessor-version":[{"id":550,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=\/wp\/v2\/posts\/547\/revisions\/550"}],"wp:attachment":[{"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/folvera.commons.gc.cuny.edu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}