Difference Between Count 1 Count - Latest Information & Updates 2026

Web Reference: Sep 27, 2024 · Both COUNT(*) and COUNT(1) return the same result and perform similarly in modern SQL Server environments, as the SQL optimizer treats them equally. Historically COUNT(1) was sometimes thought to be faster, but there is no significant performance difference in recent versions of SQL Server. Feb 23, 2024 · Although COUNT () and COUNT (1) may differ conceptually and historically, they both often produce the same result, which is the total number of rows that a query returns. Oct 29, 2020 · So, is there any difference? The simple answer is no – there is no difference at all. The COUNT(*) function counts the total rows in the table, including the NULL values. The semantics for COUNT(1) differ slightly; we’ll discuss them later. However, the results for COUNT(*) and COUNT(1) are identical. Let’s test this claim using an example query.

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