SQL 查询解析字符串并将值与今天的日期进行比较

Question

I have a data field with values: 2020Q3, 2020Q4, 2021Q1, 2021Q2, etc and I need to compare if Today's date > the data field value in SQL. For example, Today's date > 2020Q3 should return true. Today's date > 2020Q4 should return false.

I tried string tokenizer to parse and compare but no luck. Please advise. Thanks!

Answer 1

If you have a value like 'YYYY"Q"Q' , you can get the start date of the quarter using:

select date(concat(left(yyyyq, 4), '-01-01')) + interval 3 * (right(yyyyq, 1) - 1) month
from (select '2020Q3' as yyyyq) t

And then add three months for the end date. I'm not quite sure how you are interpreting > , but that information should give you what you need for the comparisons.