【多选题】
A <{p}>defining primary keys for all tables to speed up all
queries<{/p}>
B <{p}>using check constraints to speed up updates<{/p}>
C <{p}>defining foreign keys for all tables to speed up joins<{/p}>
D <{p}>the physical data
model<{/p}>
E <{p}>the configuration of storage arrays<{/p}>
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