Брой sql е, където

Примерен код

3
0

състояние в полето за sql

select count(case Position when 'Manager' then 1 else null end)
from ...


select sum(case Position when 'Manager' then 1 else 0 end)
from ...
0
0

брой sql, където

SELECT count(CASE WHEN gender = 'F' THEN 1 ELSE NULL END) women_count,
       count(CASE WHEN gender = 'M' THEN 1 ELSE NULL END) men_count
FROM people;
0
0

mysql, КАТО

SELECT colonne1, SUM(colonne2)
FROM nom_table
GROUP BY colonne1
HAVING fonction(colonne2) operateur valeur
0
0

SQL показва само, когато размерът на повече от 1

SELECT COUNT( * ) 
FROM agents 
HAVING COUNT(*)>1; --count is greater than 1

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