The compiler analyzed it, optimized it, and emitted precisely the machine instructions you expected. Same input, same output.
insert into nn_ex_1 (dept_name) values('HR'); -- ok insert into nn_ex_1 (dept_name) values(NULL); -- not null violation select * from nn_ex_1; insert into nn_ex_2 ...
Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
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