In Firebase, is there a way to get the number of children of a node without loading all the node data?

In Firebase, is there a way to get the number of children of a node without loading all the node data?

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Row count of a column family in Cassandra

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In MongoDB's pymongo, how do I do a count()?

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Count multiple columns with group by in one query

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Why does COUNT() show only one row of table?

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Add a sequence number to each element in a group using python

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How to count the number of times two values appear in two columns in any order

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How to get the exact number of keys in leveldb fast?

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Selecting a count into a variable in oracle

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is SELECT COUNT(*) expensive?

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How many B and C has A?

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Select multiple counts from one database table in one sql command

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SQL COUNT() function and LEFT OUTER JOIN

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SQL select if count

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Database design: Running totals of row counts

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