What's the difference between VARCHAR and CHAR?
Dec 11, 2009 · Because varchar is a variable-length data type, the storage size of the varchar value is the actual length of the data entered, not the maximum size for this column.
What is the difference between char, nchar, varchar, and nvarchar …
Jun 27, 2013 · varchar [(n | max)] (character varying) Variable-length, non-Unicode string data. n defines the string length and can be a value from 1 through 8,000. max indicates that the …
What is the difference between varchar and nvarchar?
28 The main difference between Varchar(n) and nvarchar(n) is: Varchar ( Variable-length, non-Unicode character data) size is upto 8000. It is a variable length data type Used to store non …
MySQL: Why use VARCHAR(20) instead of VARCHAR(255)?
Aug 12, 2009 · Possible values are 1-255. But what are its advantages if you use VARCHAR (255) that is the maximum instead of VARCHAR (20)? As far as I know, the size of the entries …
What is the difference between varchar and varchar2 in Oracle?
Jul 23, 2009 · VARCHAR is reserved by Oracle to support distinction between NULL and an empty string in the future, as ANSI standard prescribes. VARCHAR2 does not distinguish …
SQL Server Text type vs. varchar data type - Stack Overflow
I have variable length character data and want to store in SQL Server (2005) database. I want to learn some best practices about how to choose TEXT SQL type or choose VARCHAR SQL …
What does the specified number mean in a VARCHAR() clause?
1 char and varchar actually becomes irrelevant if you have just 1 variable length field in your table, like a varchar or text. Mysql will automatically change all char to varchar. The fixed length/size …
Best practices for SQL varchar column length [closed]
Every time is set up a new SQL table or add a new varchar column to an existing table, I am wondering one thing: what is the best value for the length. So, lets say, you have a column …
database - Is there a good reason I see VARCHAR (255) used so …
Note: I found this question (varchar (255) v tinyblob v tinytext), which says that VARCHAR (n) requires n +1 bytes of storage for n <=255, n +2 bytes of storage for n>255. Is this the only …
Maximum size of a varchar (max) variable - Stack Overflow
At any time in the past, if someone had asked me the maximum size for a varchar(max), I'd have said 2GB, or looked up a more exact figure (2^31-1, or 2147483647). However, in some …