![]() ![]() For longer intervals, you can divide by 60 for minutes and another 60 for hours. It returns the time difference in seconds. Here is the DATEDIFF() function in the suggestion list:Īfter you select a function, it gets inserted into your code at the cursor position with tabbable, color-coded, input parameters for quick entry:įor shorter timeframes, you can use TIMEDIFF() instead of DATEDIFF(). When you start to type a word, a popup list appears with suggestions for everything from schemas, tables/views, columns, as well as stored procedures and functions. Navicat can help us use the DATEDIFF() function by providing auto-complete. It returns the number of days between two dates or datetimes. The number of days is calculated using the MySQL DATEDIFF() function. It accepts any valid date or datetime expression. To convert the rental_date from a datetime to a pure date we can use the DATE() function. Here's what that query would look like in Navicat: ![]() The first step would be to calculate the length of all movie rentals. With that in mind, suppose that we needed to write a query that shows the average length of movie rentals for each day. These, of course, store the date and time that a film was rented, and when it was returned. In the Sakila Sample Database's rental table there are two date fields that represent a time interval: they are the rental and return dates. Calculating Movie Rental Durations in Days For demonstration purposes, I'll be working with MySQL using Navicat Premium. In today's follow-up, we're going to raise the difficulty factor slightly by calculating the daily average date/time interval that is based on start and end date columns. ![]() In previous blog, we tabulated the average daily counts for a given column in SQL Server using Navicat for SQL Server. Calculating Daily Average Date/Time Intervals in MySQL by Robert Gravelle ![]()
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