MySQL的选择在不同的年份和月份的cols

创建表，并在其中一些转储数据

CREATE TABLE `_xxx` (
    `x` DECIMAL(10,5) NULL DEFAULT NULL, 
    `x_year` INT(4) NULL DEFAULT NULL, 
    `x_month` INT(2) NULL DEFAULT NULL); 

insert into _xxx (x, x_year, x_month) values (10,2010,1); 
insert into _xxx (x, x_year, x_month) values (20,2010,2); 
insert into _xxx (x, x_year, x_month) values (30,2010,3); 
insert into _xxx (x, x_year, x_month) values (40,2010,4); 
insert into _xxx (x, x_year, x_month) values (50,2010,5); 
insert into _xxx (x, x_year, x_month) values (60,2010,6); 
insert into _xxx (x, x_year, x_month) values (70,2010,7); 
insert into _xxx (x, x_year, x_month) values (80,2010,8); 
insert into _xxx (x, x_year, x_month) values (90,2010,9); 
insert into _xxx (x, x_year, x_month) values (11,2011,1); 
insert into _xxx (x, x_year, x_month) values (21,2011,2); 
insert into _xxx (x, x_year, x_month) values (31,2011,3); 
insert into _xxx (x, x_year, x_month) values (41,2011,4); 
insert into _xxx (x, x_year, x_month) values (51,2011,5); 
insert into _xxx (x, x_year, x_month) values (61,2011,6); 
insert into _xxx (x, x_year, x_month) values (71,2011,7); 
insert into _xxx (x, x_year, x_month) values (81,2011,8); 
insert into _xxx (x, x_year, x_month) values (91,2011,9); 
insert into _xxx (x, x_year, x_month) values (12,2012,1); 
insert into _xxx (x, x_year, x_month) values (22,2012,2); 
insert into _xxx (x, x_year, x_month) values (32,2012,3); 
insert into _xxx (x, x_year, x_month) values (42,2012,4); 
insert into _xxx (x, x_year, x_month) values (52,2012,5); 
insert into _xxx (x, x_year, x_month) values (62,2012,6); 
insert into _xxx (x, x_year, x_month) values (72,2012,7); 
insert into _xxx (x, x_year, x_month) values (82,2012,8); 
insert into _xxx (x, x_year, x_month) values (92,2012,9);

现在尝试的日期之前选择所有和所有日期（两个日期之间的一切）...

SELECT * FROM _xxx WHERE x_year >= 2011 AND x_month >= 7

当然这不正确的

...之后

任何指针？

谢谢。

来源

2014-01-07 Sparki

我认为你可以做得比这更好一点。 – Strawberry

http://dev.mysql.com/doc/refman/5.1/en/datetime.html – Mihai

它`尴尬，但它的工作原理

SELECT *,DATE(CONCAT(x_year,'-',x_month,'-',01))dateColumn 
FROM _xxx 
HAVING dateColumn BETWEEN '2011-04-01' AND '2012-06-01'

Fiddle

您可以使用相同的公式创建一个DATE字段，以便您可以为其编制索引。

来源

2014-01-07 18:15:05 Mihai

感谢Mihai，使用'CONCAT'将列组合成一个新的日期列，然后选择语句正常工作。我正在使用旧的表/代码，并不想重写它的块... – Sparki

这是一个提示，而不是一个答案 - 但我想利用其他格式化选项...

SELECT (2013,06) >= (2012,08) AND (2013,06) <= (2014,05) x; 
+---+ 
| x | 
+---+ 
| 1 | 
+---+

来源

2014-01-07 17:45:53 Strawberry

MySQL的选择在不同的年份和月份的cols

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