When there is a unique key in a table (not PRIMARY KEY) and procedure is running, on duplicate key error the whole process will be halted. I want to resume on error and call the procedure again. ...
I would like to know what is the best solution for making a parent table with multiple children? I have to make multiple children table. One for each profile. Is there a better idea than having 3 ...
"Group" is a group of pupils. "Topic" is a topic of lessons. To every group corresponds exactly one topic. (So there may be multiple groups per topic.) To a pupil corresponds multiple groups, but ...
I'm not a professional DBA, I encountered a problem when I's attempting to create FOREIGN KEY for a specific table by the following SQL script (I'm using MySQL): ALTER TABLE mmy_answer ADD CONSTRAINT ...