jarlh questions

jarlh answers

• SQL UNION and MERGE
• Check if a pair of records belong to multiple group IDs
• Sql retrieving data by passing two list to two columns
• MySQL UNION: How to get data in two columns
• Get sum of all rows in each row
• SQL statement to generate column values
• SQL: count occurrences of values
• SQL use MAX() function select field not in Group By
• Is there a difference between SELECT * and SELECT ALL?
• SQL - How can I JOIN two tables and SUM a column based on IDs between them?