How can one set the column value length to a minimum and/or exact length using MS SQL Management Studio?
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How can one set the column value length to a minimum and/or exact length using MS SQL Management Studio?
For character datatypes (char/nchar/varchar/nvarchar), you set the length:
Remember that for
charandnchar, you’ll ALWAYS be allocated the x bytes space, and your string will be padded.ncharalways has 2 x allocated, but the string length will be as you specify.For string-length minimums, that really should be left to the application.
SQL Server does allow you to put a constraint on a column.
In this example, the constraint is that the column value be >= 10.
Simply write a TSQL expression in the Expression field.
LEN(myColumn) = 20– the value being inserted/updated in the column is length of 20.LEN(RTRIM(LRTIM(myColumn))) = 20– the value being inserted/updated in the column is length of 20, with all leading/trailing whitespace removed.