MySQL查询基于日期？

Question

I have a table like this

id | date | content
1  | 09-16-2013 | content 1 here
2  | 09-23-2013 | content 2 here 
3  | 09-30-2013 | content 3 here

I would like to display the content for a week from that date. For example, the first content should start on 9/16/2013 and then show until 9/22/2013 mid night. then on next day, it changes to the content 2. Same way,when I am on content 2, I want to display like "previous week content" and then show just the previous ones..I think I can do this by checking the current date and then anything below that has to be displayed.

I am not very good at these kind of mysql queries, please advise!

Regards

Answer 1

I guess you're looking for something like this

SELECT * 
  FROM table1
 WHERE date BETWEEN CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY
                AND CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY

This query will grab a row(s) where date column is within the boundaries of the current calendar week (from Monday to Sunday).

WEEKDAY() function returns the weekday index for date (0 = Monday, 1 = Tuesday, … 6 = Sunday) . The expression

CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY

returns a date for Monday of the current calendar week and

CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY

returns a date for Sunday of the current calendar week. Using BETWEEN in WHERE clause makes sure that a query returns only rows with date values that falls between these two dates (Monday through Sunday).

Note: Make sure that you have an index on date column. This query is index-friendly.

Sample output for today's date (09/19/2013):

+------+------------+----------------+
| id   | date       | content        |
+------+------------+----------------+
|    1 | 2013-09-16 | content 1 here |
+------+------------+----------------+

UPDATE: To get records for previous calendar week you just substract 1 week interval from both values in BETWEEN

SELECT * 
  FROM table1
 WHERE date 
   BETWEEN CURDATE() + INTERVAL 0 - WEEKDAY(CURDATE()) DAY - INTERVAL 1 WEEK,
       AND CURDATE() + INTERVAL 6 - WEEKDAY(CURDATE()) DAY - INTERVAL 1 WEEK

Answer 2

尝试这个

SELECT * FROM table WHERE date BETWEEN '09-16-2013' AND '09-22-2013';

Answer 3

关键字是WEEK（）

SELECT id,date, CONCAT('content ',WEEK(date),' to here') as content  FROM table_name

Answer 4

SELECT * 
FROM table
WHERE date BETWEEN '9/16/2013 00:00:00.00' AND '9/22/2013 00:00:00.00'

Answer 5

To select it dynamically, try something like

SELECT * FROM `yourTable` WHERE NOW() >= STR_TO_DATE(`date`, '%m-%d-%Y') ORDER BY STR_TO_DATE(`date`, '%m-%d-%Y') DESC LIMIT 1

or t

SELECT * FROM `yourTable` WHERE CURDATE() >= STR_TO_DATE(`date`, '%m-%d-%Y') ORDER BY STR_TO_DATE(`date`, '%m-%d-%Y') DESC LIMIT 1

sqlfiddle example - http://sqlfiddle.com/#!2/62982/4

Answer 6

You can replace the week offset to your needs

SET @weekOffset = +2;
SELECT * FROM test
WHERE WEEK(`date`) = WEEK(NOW()) + @weekOffset;

See a working demo here