nvarchar vs. varchar in SQL Server, BEWARE · Brian Hartsock's Blog
In SQL Server, nvarchar (max) is not index compliant, but there is a workaround
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SQL Server and Azure SQL index architecture and design guide - SQL Server | Microsoft Learn
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Practical 5 Varchar and Varchar(max) Differences in SQL Server, 4th one is the best - DotNetCrunch
Impact on Indexes When Mixing VARCHAR and NVARCHAR Types – Sql Quantum Leap
Are VARCHAR or CHAR Hurting Your Performance Due To Implicit Conversions? - SQLGrease SQL Server Performance tips
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indexing - SQL Server not using proper index for query - Stack Overflow
sql server - SQL VARCHAR vs NVARCHAR in CAST performance - Stack Overflow
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Query Performance Issues on VARCHAR Data Type Using an N Prefix
VARCHAR = @NVARCHAR and SARGability – SQLServerCentral
SQL Server Index Basics - Simple Talk
