{"id":24,"date":"2010-06-22T20:42:01","date_gmt":"2010-06-22T20:42:01","guid":{"rendered":"https:\/\/ibex.tech\/cloud\/?p=24"},"modified":"2022-02-17T07:14:16","modified_gmt":"2022-02-17T07:14:16","slug":"datetime","status":"publish","type":"post","link":"https:\/\/ibex.tech\/cloud\/sql-server\/queries-microsoft-sql-server\/statements-general\/datetime","title":{"rendered":"DateTime"},"content":{"rendered":"

\nEquivalent to MySQL Now()
\n<\/h4>\n

\nUse GETDATE():\n<\/p>\n

\r\n\r\nUPDATE table SET date = GETDATE();\r\n<\/code><\/pre>\n
\nThis returns the current database system timestamp as a datetime value without the database time zone offset. This value is derived from the operating system of the computer on which the instance of SQL Server is running.\n<\/p>\n
\nUsing Fields Stored Using GETDATE() In SELET queries
\n<\/h5>\n
\n24 Hours ago:\n<\/p>\n
\r\n\r\ngetdate()-1\r\n<\/code><\/pre>\n
\n \n<\/p>\n
\nSpecifying The Date & Time
\n<\/h4>\n
\nFor DateTime put single quotes around the value:\n<\/p>\n
\r\n\r\n sTemp = String::Format("{0:D4}", Convert::ToInt32(SelectedStartDate->SelectedDate->Year)) + "-";\r\n sTemp += String::Format("{0:D2}", Convert::ToInt32(SelectedStartDate->SelectedDate->Month)) + "-";\r\n sTemp += String::Format("{0:D2}", Convert::ToInt32(SelectedStartDate->SelectedDate->Day)) + " ";\r\n sTemp += "00:00:00";\r\n SqlWhereStatement += " AND StartDateTime>='" + sTemp + "'";\r\n<\/code><\/pre>\n
\nDatetime format can be a problem due to SQL storing milliseconds but outputting select strings with a datatime value not having the milliseconds. So you then manually add it but there are then problems of the SQL milliseconds being 1 out from the variable value you stored from and also where to tag the milliseconds onto due to different internatational conventions.\n<\/p>\n
\nGood examples of breaking down data time fields in searches:
\nhttp:\/\/www.databasejournal.com\/features\/mssql\/article.php\/2209321\/Working-with-SQL-Server-DateTime-Variables-Part-Three—Searching-for-Particular-Date-Values-and-Ranges.htm<\/a>\n<\/p>\n
\nWorking Examples
\n<\/h4>\n
\nWrite Date And Time From VC++ DateTime Variable
\n<\/h5>\n
\r\n\r\nDateTime ^TimeNow = gcnew DateTime();\r\nTimeNow = DateTime::Now;\r\n"UPDATE SomeTableName SET LastViewed=\\'" + TimeNow->ToString("s") + "\\' WHERE ...\r\n<\/code><\/pre>\n
\n"s" outputs the string in the ISO international format, e.g. '2006-04-17T14:38:09'\n<\/p>\n
\nCompare day
\n<\/h5>\n
\r\n\r\nquery = "SELECT * FROM your_table WHERE DATEDIFF(dd, your_date_field, GETDATE()) = 0"\r\n<\/code><\/pre>\n
\nGets all entries from your_table where your_date_field and the current date (today's date) are not different. The 'dd' means day, so it is comparing the day.\n<\/p>\n
\nExclude Entries On Specific Days
\n<\/h5>\n
\r\n\r\nWHERE DATENAME(dw, StartDateTimeColumnName) NOT IN ('Monday','Tuesday') ";\r\n<\/code><\/pre>\n
\nInclude Entries At Specific Times
\n<\/h5>\n
\r\n\r\nWHERE DATEPART(HOUR, StartDateTimeColumnName)>=12 AND DATEPART(HOUR, EndDateTimeColumnName)<15\r\n<\/code><\/pre>\n
\nGet all entries from yesterday
\n<\/h5>\n
\r\n\r\nquery = "SELECT * FROM users WHERE DATEDIFF(dd, datecreated, GETDATE()) = 1"\r\n<\/code><\/pre>\n
\nGet from last week
\n<\/h5>\n
\r\n\r\nquery = "SELECT * FROM users WHERE DATEDIFF(ww, datecreated, GETDATE()) = 1"\r\n<\/code><\/pre>\n
\nFull list of what DATEDIFF does
\n<\/h4>\n
\nhttp:\/\/msdn.microsoft.com\/en-us\/library\/ms189794.aspx<\/a>\n<\/p>\n
\nInternational Date Format Issues
\n<\/h4>\n
\nGive it to the server in ISO format (yyyy-MM-dd HH:mm:ss)<\/p>\n","protected":false},"excerpt":{"rendered":"
Equivalent to MySQL Now() Use GETDATE(): UPDATE table SET date = GETDATE(); This returns the current database system timestamp as a datetime value without the database time zone offset. This value is derived from the operating system of the computer on which the instance of SQL Server is running. Using Fields Stored Using GETDATE() In […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":["post-24","post","type-post","status-publish","format-standard","hentry","category-statements-general"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/posts\/24","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/comments?post=24"}],"version-history":[{"count":11,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/posts\/24\/revisions"}],"predecessor-version":[{"id":1223,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/posts\/24\/revisions\/1223"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/media?parent=24"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/categories?post=24"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/cloud\/wp-json\/wp\/v2\/tags?post=24"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}