How to Convert a Week Number and Year to a Date in MySQL?

Converting Week Number to Date in MySQL: A Comprehensive Guide

Determining the specific date corresponding to a particular week and year can be a common need when dealing with time-sensitive data. This article will provide a step-by-step explanation on how to convert a year and calendar week into the date for the Tuesday of that week.

Utilizing STR_TO_DATE() Function

MySQL's STR_TO_DATE() function offers an efficient and straightforward approach to this conversion. The function takes a string representing the date-time values and a format string that defines the interpretation of the string.

Format String for Week-Based Conversion

In this scenario, we specify a custom format string '%X %V %W' to indicate the year (%X), calendar week number (%V), and day of the week (%W). For Tuesday, this day of the week is represented as "Tuesday".

Example: Week 32 of 2013

To illustrate this conversion, let's consider determining the Tuesday date for the 32nd week of 2013:

SELECT STR_TO_DATE('2013 32 Tuesday', '%X %V %W');

This query will return the following output:

'2013-08-13'

Therefore, the Tuesday of the 32nd week of 2013 corresponds to August 13, 2013.

Conclusion

The STR_TO_DATE() function in MySQL provides an elegant and concise solution for converting a year and calendar week into a specific date. This functionality is particularly useful for tasks involving date manipulation, scheduling, and calendar-based calculations.

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