You specify the maximum length of the string with n . Storage size is the actual entry length. TEXT TEXT stores character data of variable length up to two gigabytes. BIT data cannot be NULL and cannot have indexes defined on it. Refer to your documentation on Transact-SQL for more information about abstract data types.
Case is ignored, and spaces can be inserted anywhere within the value.
See your Transact-SQL documentation for more information. When displayed, it is rounded up to two places. For negative values, the minus sign must follow the dollar sign. Commas are not allowed. A comma is inserted after every three digits.