Question

我想在下面给出的名为Gender的表中计算男性和女性的数量。答案应该是女性= 2男性= 3计数。 SQL中是否有任何查询。

Gender
MALE
MaLE
FEMALE
Female

Answer 1

SELECT SUM(CASE WHEN Gender = 'male' THEN 1 ELSE 0 END) as Male_count,
       SUM(CASE WHEN Gender = 'Female' THEN 1 ELSE 0 END) as Female_count
FROM some_unknown_table

正如nightfox79所提到的，如果您的默认排序规则区分大小写，您可能应该对文本进行转换以确保它匹配。所以，使用这个

UPPER(GENDER) = 'MALE'
UPPER(GENDER) = 'FEMALE'

旁注：我认为你应该按照这种格式使用tinyint列作为性别，正如Damien所说。 https://en.wikipedia.org/wiki/ISO/IEC_5218

Answer 2

请试试这个： -

 Select count(CASE WHEN Gender = 'male' THEN 1 ELSE 0 END) as Male_count,
        count(CASE WHEN Gender = 'Female' THEN 1 ELSE 0 END) as Female_count
  FROM your_table

Answer 3

SELECT UPPER([Gender]),count(*)
  FROM [test].[dbo].[TableName] group by UPPER([Gender])

计算男性和女性的数量

3 个答案: