从数据库中的日期检查日期输入的范围

Question

I have a table named nca and heres what it looks like with values :

+--------+---------+------------+------------+--------------+---------+
| nca_id | nca_no  | issue_date | nca_amount | account_type | balance |
+--------+---------+------------+------------+--------------+---------+
|      1 | 14-0001 | 2015-01-08 |     200000 | ROP          |       0 |
|      2 | 14-0002 | 2015-01-08 |     400000 | ROP          |       0 |
|      3 | 14-0003 | 2015-02-02 |    1000000 | ROP          |       0 |
|      4 | 14-0004 | 2015-02-02 |     300000 | ROP          |       0 |
|      5 | 14-0001 | 2015-01-08 |     250000 | DBP-TRUST    |       0 |
|      6 | 14-0002 | 2015-01-08 |     400000 | DBP-TRUST    |       0 |
+--------+---------+------------+------------+--------------+---------+

Now using this query it can display the SUM of the nca_amount base on the issue_date:

SELECT SUM(nca_amount) FROM nca WHERE account_type = 'ROP' AND issue_date = '2015-02-02'

which gives a result of 1300000 since it adds all the amount that having a date of 2015-02-02 and just works fine if you set the date just on the query itself.

But I have scenario that I want to solve. I have an html form where the user could enter the date he want.

And if the user would type the date of 2015-02-23, I want this date input referring to the issue_date of 2015-02-02 from my table. What I want is if the date input is in the RANGE of the MONTH of the issue_date on the nca table, this would refer to the issue_date found on the nca table and display the sum. For example :

user input_date = '2015-02-23' referring to issue_date = '2015-02-02'

as the inputted date is in the range of '2015-02-02' found on my nca table and then it can display the sum like on my query above. How can I do this query? Can any one help with this one? thanks in advance.

Answer 1

If you want to match the month:

SELECT SUM(nca_amount)
FROM nca
WHERE account_type = 'ROP' AND
      year(issue_date) = year('2015-02-02') and
      month(issue_date) = month('2015-02-02');

However, this doesn't allow the query to use an index on issue_date . For that, you need to rephrase the query as:

SELECT SUM(nca_amount)
FROM nca
WHERE account_type = 'ROP' AND
      issue_date >= date(concat(left('2015-02-02', 7), '-01')) and
      issue_date <  date(concat(left('2015-02-02', 7), '-01')) + interval 1 month;