Concatenate multiple result rows of one column into one, group by another column [duplicate]

Concatenate multiple result rows of one column into one, group by another column [duplicate]

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How to include "zero" / "0" results in COUNT aggregate?

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Avoid division by zero in PostgreSQL

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Postgres - aggregate two columns into one item

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PostgreSQL: running count of rows for a query 'by minute'

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GROUP BY + CASE statement

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GROUP BY and COUNT in PostgreSQL

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DISTINCT ON in an aggregate function in postgres

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Return as array of JSON objects in SQL (Postgres)

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Two SQL LEFT JOINS produce incorrect result

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in postgres select, return a column subquery as an array?

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date_trunc 5 minute interval in PostgreSQL [duplicate]

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how to group by and return sum row in Postgres

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Best way to count records by arbitrary time intervals in Rails+Postgres

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SqlAlchemy: count of distinct over multiple columns

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