Unverified50% confidenceFactExact time
PostgreSQL treats NULL as the largest value by default, placing it at the end in ascending order and at the beginning in descending order.
1
Sources
50%
Confidence
Long-term
Relevance
9/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedIn PostgreSQL, SELECT NULL = NULL returns NULL rather than TRUE.74% similarUnverifiedPostgreSQL's aggregate functions ignore NULL values: COUNT(*) counts all rows, while COUNT(val), SUM, and AVG ignore NULL values.74% similarUnverifiedPostgreSQL extensions are fully equal to the kernel at the query planner level, and the optimizer can perceive and utilize statistical information from extension indexes to generate execution plans.67% similarUnverifiedDECIMAL and NUMERIC are semantically equivalent in standard SQL, both storing numbers precisely in decimal form to avoid the rounding errors of FLOAT/DOUBLE binary floating-point representation.66% similar
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