{"id":153,"date":"2009-10-02T13:30:55","date_gmt":"2009-10-02T02:30:55","guid":{"rendered":"http:\/\/blog.peter-johnson.com.au\/?p=153"},"modified":"2009-10-02T13:30:55","modified_gmt":"2009-10-02T02:30:55","slug":"153","status":"publish","type":"post","link":"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/","title":{"rendered":"SQL\/Server function to format integer IP address"},"content":{"rendered":"

The following is a small SQL\/Server function to convert an IP address stored as an integer (actually bigint) into a human-readable string in the format ‘1.2.3.4’. I’m using it as part of a geolocation by IP address project.<\/p>\n

CREATE FUNCTION IP2String (@IPAddress bigint)
\nRETURNS varchar(15)
\nAS
\nBEGIN
\n\tDECLARE @IP1 bigint
\n\tDECLARE @IP2 bigint
\n\tDECLARE @IP3 bigint
\n\tDECLARE @IP4 bigint
\n\tDECLARE @ResultVar varchar(15)<\/p>\n

\tSET @IP1 = @IPAddress \/ 16777216
\n\tSET @IPAddress = @IPAddress – @IP1 * 16777216
\n\tSET @IP2 = @IPAddress \/ 65536
\n\tSET @IPAddress = @IPAddress – @IP2 * 65536
\n\tSET @IP3 = @IPAddress \/ 256
\n\tSET @IPAddress = @IPAddress – @IP3 * 256
\n\tSET @IP4 = @IPAddress<\/p>\n

\tSET @ResultVar = CAST(@IP1 AS varchar(3)) + ‘.’
\n\t\t+ CAST(@IP2 AS varchar(3)) + ‘.’
\n\t\t+ CAST(@IP3 AS varchar(3)) + ‘.’
\n\t\t+ CAST(@IP4 AS varchar(3))
\n\tRETURN @ResultVar<\/p>\n

END\n<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"

The following is a small SQL\/Server function to convert an IP address stored as an integer (actually bigint) into a human-readable string in the format ‘1.2.3.4’. I’m using it as part of a geolocation by IP address project. CREATE FUNCTION IP2String (@IPAddress bigint) RETURNS varchar(15) AS BEGIN DECLARE @IP1 bigint DECLARE @IP2 bigint DECLARE @IP3 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,10],"tags":[],"class_list":["post-153","post","type-post","status-publish","format-standard","hentry","category-programming","category-sql-database"],"yoast_head":"\r\nSQL\/Server function to format integer IP address - Peter Johnson's Blog<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"SQL\/Server function to format integer IP address - Peter Johnson's Blog\" \/>\r\n<meta property=\"og:description\" content=\"The following is a small SQL\/Server function to convert an IP address stored as an integer (actually bigint) into a human-readable string in the format ‘1.2.3.4’. I’m using it as part of a geolocation by IP address project. CREATE FUNCTION IP2String (@IPAddress bigint) RETURNS varchar(15) AS BEGIN DECLARE @IP1 bigint DECLARE @IP2 bigint DECLARE @IP3 […]\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\" \/>\r\n<meta property=\"og:site_name\" content=\"Peter Johnson's Blog\" \/>\r\n<meta property=\"article:published_time\" content=\"2009-10-02T02:30:55+00:00\" \/>\r\n<meta name=\"author\" content=\"Peter Johnson\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Peter Johnson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\"},\"author\":{\"name\":\"Peter Johnson\",\"@id\":\"https:\/\/blog.peter-johnson.com.au\/#\/schema\/person\/4c77aa7d5243430f95831ecb7277546c\"},\"headline\":\"SQL\/Server function to format integer IP address\",\"datePublished\":\"2009-10-02T02:30:55+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\"},\"wordCount\":120,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/blog.peter-johnson.com.au\/#\/schema\/person\/4c77aa7d5243430f95831ecb7277546c\"},\"articleSection\":[\"Programming\",\"SQL \/ Database\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\",\"url\":\"https:\/\/blog.peter-johnson.com.au\/index.php\/2009\/10\/02\/153\/\",\"name\":\"SQL\/Server function to format integer IP address - 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