Something which may seem basic, but in many SQL statements I analyse for
performance optimisation, the same
mistakes are recurring. When a WHERE clause is used the actual operator used
will influence the query speed.
That is not to say , every statement has the option of using the optimal
operator.
It's worth keeping in mind the order of the operator , the order starts with
the fastest performer.
=
<,<=,>,>=
LIKE
<>
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