Akhilesh Mishra questions

Akhilesh Mishra answers

• How to return just distinct values from json.agg() function
• How to drop unique constraint from mysql table on a foreign key column
• How to Find Consecutive Dates in Postgres SQL
• PostgreSQL function : relation does not exist error
• PostgreSQL "if not exists" always throws syntax error
• PostgreSQL: more than one row returned by a subquery used as an expression
• SQL Windowing Aggregation Over Two Consecutive Date