select rows with count 1 in mysql code example
Example 1: get number of rows in every table mysql
mysql> SELECT table_name, table_rows
->FROM INFORMATION_SCHEMA.TABLES
->WHERE TABLE_SCHEMA = 'business';
Example 2: mysql get count of rows
SELECT COUNT(*) FROM my_table;
SELECT COUNT(*) FROM my_table WHERE my_column IS NULL;
SELECT COUNT(*) FROM my_table WHERE my_column = 'my_value';
SELECT COUNT(DISTINCT tel) gender_count,
COUNT(DISTINCT CASE WHEN gender = 'male' THEN tel END) male_count,
COUNT(DISTINCT CASE WHEN gender = 'female' THEN tel END) female_count
FROM people;