从限制和描述的2列获得结果

Question

SELECT *
FROM VB_Names
WHERE Buurt = 'Spangen'
    AND Gender  = 'M'
    AND Gender  = 'V'
GROUP BY Name
ORDER BY COUNT DESC LIMIT 6

我想从性别＆＃39; M＆＃39;列中获得3个结果。和性别＆＃39; V＆＃39;列中的3个结果与Count on DESC一起。

Answer 1

性别不能同时包含'M'和'V'，因此此查询不会返回任何内容。相反，请使用union all：

(SELECT *
 FROM VB_Names
 WHERE Buurt = 'Spangen' AND Gender = 'M'
 ORDER BY count DESC
 LIMIT 3
) UNION ALL
(SELECT *
 FROM VB_Names
 WHERE Buurt = 'Spangen' AND Gender = 'V'
 ORDER BY count DESC
 LIMIT 3
)

Answer 2

将AND条件更改为OR

SELECT *
FROM VB_Names
WHERE Buurt = 'Spangen'
    AND (Gender  = 'M' OR Gender  = 'V')
GROUP BY Name
ORDER BY COUNT DESC LIMIT 6