What is difference between query and Scan in DynamoDB?
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Get
query
you are using a primary key inwhere
condition, The computation complexity islog(n)
as the most of key structure is binary tree.while
scan
query you have to scan whole table then apply filter on every singlerow
to find the right result. The performance isO(n)
. Its much slower if your table is big.In short, Try to use
query
if you know primary key. onlyscan
for only the worst case.