Multiple FilterExpression in dynamodb scan - amazon-dynamodb

Question

Im trying to build a histogram of a certain attribute in my dynamodb.
I thought the easiest way would be to use multiple filter-expression
This is my baseline query with a single filter-expression and it works
aws dynamodb scan --table-name test --select "COUNT" --filter-expression "contains(score, :s)" --expression-attribute-values '{ ":s": { "N": "1" } }' --limit 100
Now, im trying to extend it to multiple filter expressions and im not sure how.
I have tried:
aws dynamodb scan --table-name test --select "COUNT" --filter-expression "score = :s" --filter-expression "score = :s1" --expression-attribute-values '{ ":s": { "N": "1" }, ":s1": { "N": "40" } }' --limit 100
and
aws dynamodb scan --table-name test --select "COUNT" --filter-expression "score = :s" | "score = :s1" --expression-attribute-values '{ ":s": { "N": "1" }, ":s1": { "N": "40" } }' --limit 100

Answer 1

Probably I am late to answer. But, was searching for a similar scenario and got nothing. Still answering if someone else could benefit.
aws dynamodb scan --table-name test --select "COUNT" \
--filter-expression "score = :s OR score = :s1" \
--expression-attribute-values '{ ":s": { "N": "1" }, ":s1": { "N": "40" } }' \
--limit 100

Answer 2

Filter expressions are a kind of condition expression. You can combine filter expressions with boolean logic. However, in your example, you can get away without using AND/OR operators to combine expressions.
aws dynamodb scan --table-name test --select "COUNT" \
--filter-expression "score IN :s, :s1" \
--expression-attribute-values '{ ":s": { "N": "1" }, ":s1": { "N": "40" } }' \
--limit 100

Answer 3

using between
aws dynamodb scan --table-name test --select "COUNT" \
--filter-expression "(score between :s and :s1)" \
--expression-attribute-values '{ ":s": { "N": "0" }, ":s1": { "N": "10" } }'

Answer 4

For those who are searching for the nodeJs filter Expression:
const params = {
TableName: "orderMessages",
Key: {
order_id,
},
FilterExpression: "#order_id = :ordrId OR #timestamp < :ts",
ExpressionAttributeNames: {
"#order_id": "order_id",
"#timestamp": "timestamp"
},
ExpressionAttributeValues: {
":ordrId": order_id,
":ts": now
},
}
Happy coding :)