Microsoft has made available two pdf files with a nice chart of all the data type conversions. It is pretty much the chart that belongs to the topic CAST and CONVERT (Transact-SQL). Now you have a way of printing a nice looking chart so that you can alw…
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SQL Server has two data types to store character data, both of them come in fixed and variable length sizes. The char and varchar data type uses one byte of store to store one character, the nchar and nvarchar data type uses two bytes of store to store one character. The nchar and nvarchar data types are used to store unicode of data