jarlh questions

jarlh answers

• Find duplicate values among multiple columns across different rows
• SQL: group by number with error margin
• SQL Average height of building
• Select distinct group of records only when all of the records' certain column is of a certain value
• SQL statement to get column based on ID from same table
• UPDATE SET values from list
• Why doesn't ORDER BY 'id' 'desc' return a syntax error?
• 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