sql count having
-- Classes with more than 10 students
SELECT student_class, COUNT(*) FROM students GROUP BY student_class
HAVING count(*) > 10;sql count having
-- Classes with more than 10 students
SELECT student_class, COUNT(*) FROM students GROUP BY student_class
HAVING count(*) > 10;sql count
/*COUNT(column_name) will return the number of rows from the column
that are not NULL*/
SELECT COUNT(column_name)
FROM table_name;
/*COUNT(*) will return the number of rows from the table*/
SELECT COUNT(*)
FROM table_name;SQL only show where count is great than 1
SELECT COUNT( * )
FROM agents
HAVING COUNT(*)>1; --count is greater than 1mysql HAVING
SELECT colonne1, SUM(colonne2)
FROM nom_table
GROUP BY colonne1
HAVING fonction(colonne2) operateur valeurCopyright © 2021 Codeinu
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