{"id":431,"date":"2023-07-30T13:38:32","date_gmt":"2023-07-30T13:38:32","guid":{"rendered":"https:\/\/grionic.com\/?p=431"},"modified":"2023-07-30T22:03:22","modified_gmt":"2023-07-30T22:03:22","slug":"group-data-by-time-in-sql","status":"publish","type":"post","link":"https:\/\/grionic.com\/group-data-by-time-in-sql\/","title":{"rendered":"How to Group Data by Time in SQL Server"},"content":{"rendered":"\n<p>In this article, I will show you how to group data by decade, year, quarter, month, week, day, hour, and minute.<\/p>\n\n\n\n<p>To simplify things, the code will group data by time and count the number of rows in each group.<\/p>\n\n\n\n<p>But first, we need to learn about the DATEPART function. <\/p>\n\n\n\n<p>The <a href=\"https:\/\/learn.microsoft.com\/en-us\/sql\/t-sql\/functions\/datepart-transact-sql?view=sql-server-ver16\" target=\"_blank\" rel=\"noreferrer noopener\">DATEPART<\/a> function is a built-in function in <a href=\"https:\/\/grionic.com\/category\/sql\/\" target=\"_blank\" rel=\"noreferrer noopener\">SQL Server<\/a> that returns an integer of a specified datepart of a date.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>DATEPART(datepart, date)<\/code><\/pre>\n\n\n\n<p>The datepart argument can be year, month, day, hour, minute, and second. <\/p>\n\n\n\n<p>Meanwhile, the date argument is the date you wish to extract the specified datepart from. <\/p>\n\n\n\n<p>For example:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nDATEPART(day, date_column) AS &#91;Day]\nFROM table_name;<\/code><\/pre>\n\n\n\n<p>The code above will return a Day column listing days (as integer values) extracted for the date_column.<\/p>\n\n\n\n<p>Now that you understand how DATEPART works, let&#8217;s get started. <\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by decade in SQL<\/h2>\n\n\n\n<p>This code groups your data by decade and counts all the rows within each group. <\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nLEFT(YEAR(date_column), 3) + '0' AS &#91;Decade] \n, COUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY LEFT(YEAR(date_column), 3) + '0';\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by year in SQL<\/h2>\n\n\n\n<p>This code groups your data by year and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nYEAR(date_column) AS &#91;Year]\n, COUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY YEAR(date_column);\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by quarter in SQL<\/h2>\n\n\n\n<p>This code groups your data by quarter and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nDATEPART(quarter, date_column) AS &#91;Quarter], \nCOUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY DATEPART(quarter, date_column);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by month in SQL<\/h2>\n\n\n\n<p>This code groups your data by month and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nMONTH(date_column) AS &#91;Month]\n, COUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY YEAR(date_column), MONTH(date_column);\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by week in SQL<\/h2>\n\n\n\n<p>This code groups your data by week and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT YEAR(date_column) AS &#91;Year]\n, DATEPART(week, date_column) AS &#91;Week]\n, COUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY YEAR(date_column), DATEPART(week, date_column);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by day in SQL<\/h2>\n\n\n\n<p>This code groups your data by day and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT CAST(date_column AS DATE) AS &#91;Day]\n, COUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY CAST(date_column AS DATE);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by hour in SQL<\/h2>\n\n\n\n<p>This code groups your data by hour and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT DATEPART(hour, date_column) AS hour, COUNT(*) AS count\nFROM table_name\nGROUP BY DATEPART(hour, date_column);<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by minute in SQL<\/h2>\n\n\n\n<p>This code groups your data by minute and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT DATEPART(minute, date_column) AS minute, COUNT(*) AS count\nFROM table_name\nGROUP BY DATEPART(minute, date_column);\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">How to group data by second in SQL<\/h2>\n\n\n\n<p>This code groups your data by second and counts all the code within each group.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT DATEPART(second, date_column) AS &#91;Second], \nCOUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY DATEPART(second, date_column);\n<\/code><\/pre>\n\n\n\n<p>You can also group by multiple time periods. For instance, you can group by year, month, day, and hour to get more specific as shown in the code below.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \nYEAR(date_column) AS &#91;Year], \nMONTH(date_column) AS &#91;Month],\nDAY(date_column) AS &#91;Day],\nDATEPART(hour, date_column) AS &#91;Hour], \nCOUNT(*) AS &#91;Count]\nFROM table_name\nGROUP BY YEAR(date_column), \nMONTH(date_column),\nDAY(date_column),\nDATEPART(hour, date_column);<\/code><\/pre>\n\n\n\n<p>I hope this was helpful. <\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, I will show you how to group data by decade, year, quarter, month, week, day, hour, and &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to Group Data by Time in SQL Server\" class=\"read-more button\" href=\"https:\/\/grionic.com\/group-data-by-time-in-sql\/#more-431\" aria-label=\"Read more about How to Group Data by Time in SQL Server\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":432,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,12],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.9 - 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