alter table emp
modify mgr;
Are previous constraints dropped/retained?
What is the use of this?
alter table emp modify mgr; Are previous constraints dropped/retained? What is the use of
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alter table emp
modify mgr;
Are previous constraints dropped/retained?
What is the use of this?
From the docs
So it’s a no-op if you don’t specify any properties. It is not, in itself, very useful.