mysql count multiple columns in one query
mysql count multiple columns in one query:
SELECT
count(*) as count_rows,
count(col1) as count_1,
count(col2) as count_2,
count(distinct col1) as count_distinct_1,
count(distinct col2) as count_distinct_2,
count(distinct col1, col2) as count_distinct_1_2
FROM `table` ;alter table add multiple columns mysql
CREATE TABLE IF NOT EXISTS vendors (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(255)
);
ALTER TABLE vendors
ADD COLUMN phone VARCHAR(15) AFTER name;Copyright © 2021 Codeinu
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