选择日期字段在给定月份和年份中的行
问题描述：
我的SQL表如下：
id (int) | date (date) | text1 (varchar) | text2 (varchar)
我想选择日期适合给定月份和年份的行，而不管那天。
在选择语句中，月份和年份均以整数形式给出。
所以缺少的是哪里子句。也许 extract（）是我想要的东西，但是我不知道如何将它与两个整数一起使用，例如 2011 和 02 。
I want to select the lines whose date suits a given month and year, regardless of the day.
Both month and year are given in the select-statement as integers.
So the missing thing is the where-clause. Perhaps extract() is the thing I'm looking for, but I don't know how to use it with the two integers, e.g. 2011 and 02.
答
您可以使用提取：
SELECT * FROM yourtable
WHERE EXTRACT(month FROM "date") = 2
AND EXTRACT(year FROM "date") = 2011
但是情况下，您也可以这样做：
But in this case you could also do this:
SELECT * FROM yourtable
WHERE "date" >= '2011-02-01' AND "date" < '2011-03-01'