få räkning från samma kolumn i en mysql-tabell?

Prova detta för radvis resultat:

SELECT gender, COUNT(User_id) AS count
FROM User
GROUP BY gender;

Utdata:

| gender | count |
|--------|-------|
|      F |     4 |
|      M |     2 |

Prova detta för radvis resultat med totalsumman:

SELECT  (IFNull(gender,'Total')) AS gender,
COUNT(User_id) AS Count
FROM User
GROUP BY gender
WITH rollup;

Utdata:

| gender | Count |
|--------|-------|
|      F |     4 |
|      M |     2 |
|  Total |     6 |

Prova detta för kolumnmässigt resultat:

SELECT
  COUNT(CASE WHEN gender = 'M' THEN User_id END) AS males,
  COUNT(CASE WHEN gender = 'F' THEN User_id END) AS females,
  COUNT(*) AS Total
FROM User;

Utdata:

| males | females | Total |
|-------|---------|-------|
|     2 |       4 |     6 |

Se denna SQLFiddle