David Faber questions

David Faber answers

• Find which character occurs the greatest number of times in a string
• select rows having time difference less than 2 hour of a single column
• Orace: Default column value based on a filter
• How to Dense Rank Sets of data
• Handling exception in Oracle
• Oracle - need to extract text between given strings
• Using a case statement in a check constraint
• Oracle update multiple spaces in a column with a single space
• Solr date field format
• regex to replace backslash and single quote with single quote using postgres regexp_replace()