Tag: mysql

This question was asked in a practice Test, and I am new to SQL. Question was to determine the average marks scored by the male and female students. Also, you are required to determine the count of …

The following renders the correct output. ( SELECT answer_data FROM wp_learndash_pro_quiz_statistic_ref b, wp_learndash_pro_quiz_statistic bb WHERE wp_users.id = b.user_id AND b….

I have a table column like following Now I want to Divide this column into 3 columns like as How will the SQL Query for this? Answer On MySQL 8+, you could use ROW_NUMBER for this purpose: Demo This approach has an advantage over a union in that it can easily be extended to support more rows and columns as

I am trying to calculate a column average by group for several groups in the same query. Assume there are 2 columns (a,b), for each I want the average of another column (c) per group of the first column. For example, this would return the a groups and average c value per a group. This gives me two columns. a

Example A SELECT column_name(s) FROM table1 LEFT JOIN table2 ON table1.key = table2.key WHERE table2.key IS NULL; Example B SELECT column_name(s) FROM table1 LEFT JOIN table2 ON table1.key = table2….