的行数这是我的查询,我使用:获取取决于日期
SELECT COUNT(*), categoryName
FROM StuSelectCateg
WHERE depName = 'Admisiones' timeOut>= '$Date1'
AND timeOut < '$Date2'
GROUP BY categoryName
,但它不返回任何结果。
This is the output i want but with the dates
的行数这是我的查询,我使用:获取取决于日期
SELECT COUNT(*), categoryName
FROM StuSelectCateg
WHERE depName = 'Admisiones' timeOut>= '$Date1'
AND timeOut < '$Date2'
GROUP BY categoryName
,但它不返回任何结果。
This is the output i want but with the dates
改变这一行
where depName = 'Admisiones' timeOut>= '$Date1' and timeOut < '$Date2'
到
where depName = 'Admisiones' and timeOut>= '$Date1' and timeOut < '$Date2'
你缺少and
之前timeOut
您的查询不正确并丢失AND
。请尝试以下查询
Select count(*), categoryName
from StuSelectCateg
where depName = 'Admisiones' and timeOut>= '$Date1'
and timeOut < '$Date2'
group by categoryName
哇多么愚蠢!反正我很感谢 – 2014-11-25 05:13:08
您在depName和timeOut之间的WHERE子句中缺少'AND'。你需要打开错误报告,所以它会告诉你,而不是给你一个空白的结果。是否解决了关于输出的问题很难说,因为缺少任何其他信息在你的问题 – Sir 2014-11-25 04:03:45