Mureinik questions

Mureinik answers

• Unable to make generated column in postgresql for Json data
• Two foreign keys in postgres
• com.microsoft.sqlserver.jdbc.SQLServerException: The value is not set for the parameter number 1
• MySQL delete data from a table
• Is there any way to know whether an npm package has OS specific build requirements?
• SUM(columnname) gives me a different result than manually summing columnname in SQL Server. Why?
• Compute average sales per day in MySQL
• JUnit - Test class instantiation with objects in parameters
• mockito can't match overloaded method
• Importing multiple files named sequentially in Python