I have a table with 2 columns requested with NOT NULL constraint as shown below Col1 Col2 Val1 Val2 Val3 Val4 I am trying to add a new column called 'Col3' ALTER TABLE table ADD COLUMN C...

I'm just getting my toes wet in MySQL DBA and created some users and assigned roles to them. It took me a long time to realize that this on its own didn't result in the user assuming the roll when the...

I have two entities namely Prescription and Medicine. A Prescription must include one or many Medicines and a Medicine may be included in many Prescription. Two attributes which are associated with ...

I have a table representing product groups. Groups are defined by row number and their Type. Hence here we have 2 groups, the group is defined by the Type A, the Type B being components. Row numbe...