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Showing posts with the label VARCHAR vs TEXT

SQL Text vs VARCHAR

When to use VARCHAR and When to use TEXT TEXT is used for large pieces of string data. If the length of the field exceeed a certain threshold, the text is stored out of row. VARCHAR is always stored in row and has a limit of 8000 characters. If you try to create a VARCHAR(x) , where x > 8000 , you get an error: Server: Msg 131, Level 15, State 3, Line 1 The size () given to the type ‘varchar’ exceeds the maximum allowed for any data type (8000) These length limitations do not concern VARCHAR(MAX) in SQL Server 2005 , which may be stored out of row, just like TEXT . Note that MAX is not a kind of constant here, VARCHAR and VARCHAR(MAX) are very different types, the latter being very close to TEXT . In prior versions of SQL Server you could not access the TEXT directly, you only could get a TEXTPTR and use it in READTEXT and WRITETEXT functions. In SQL Server 2005 you can directly access TEXT columns (though you still need an explicit cast...