New posts in Varchar

Using column size much larger than necessary

varchar(255) or varchar(256)?

Understanding varchar(max) 8000 column and why I can store more than 8000 characters in it

Switch VARCHAR to DATE in MySQL

Using MAX text or more specific, smaller type

Do varchar/text/longtext columns in MySQL occupy full size in filesystem even for partially filled cells?

Index performance for CHAR vs VARCHAR (Postgres)

Why does LEN() function badly underestimate cardinality in SQL Server 2014?

Write differences between varchar and nvarchar

Possible INDEX on a VARCHAR field in MySql