从字符串中提取月份名称和年份

Question

I have to extract the month name and year from the string of the form mmm-yy (Eg. Jan-20) using mysql query. I have tried the following query it returns only NULL. The query is:

SELECT monthname(mon)FROM month_extract_plan

Sample data: 

Jan-20
Feb-20
Dec-19

Answer 1

You can use a Query like this:

SELECT 
    SUBSTRING_INDEX(str, '-', 1)  as MyMonth,
    SUBSTRING_INDEX(str, '-', -1) as MyYear
FROM month_extract_plan;

Answer 2

Use STR_TO:Date

SELECT monthname(STR_TO_DATE('Jan-20','%b-%y')) ,YEAR(STR_TO_DATE('Jan-20','%b-%y')) 

gets you

'January 2020