Aggregate functions in PostgreSQL are defined in terms of state values and state transition functions. That is, an aggregate operates using a state value that is updated as each successive input row ...
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Aggregate functions compute a single result from a set of input values. The built-in general-purpose aggregate functions are listed in Table 9.60 while statistical aggregates are in Table 9.61. The ...
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AHRQ has released new beta software that allows states and healthcare organizations to calculate severe maternal morbidity using readily available inpatient administrative claims data.