Weighted Search Volume Median

SQL practice question · Hard · Analytics · Google

query_frequencies has one row per search term (term, frequency). Treat the table as a compressed list in which each term's frequency value is repeated frequency times (a term with frequency 3 contributes the values 3, 3, 3). Compute the median of that expanded list without a MEDIAN function: with N values sorted ascending, the median is the middle value when N is odd and the average of the two middle values when N is even. Output a single column: weighted_median_frequency (rounded to 1 decimal).

Table: query_frequencies

Schema of query_frequencies
Column	Type
term	TEXT
frequency	INTEGER

Schema of query_frequencies

Column

Type

term

TEXT

frequency

INTEGER

Sample rows of query_frequencies
term	frequency
A	5
B	3
C	2

Sample rows of query_frequencies

term

frequency

Expected output on the sample data
weighted_median_frequency
4

Expected output on the sample data

weighted_median_frequency

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