What's the difference between VARCHAR and CHAR?
Dec 11, 2009 · VARCHAR is variable-length. CHAR is fixed length. If your content is a fixed size, you'll get better performance with CHAR. See the MySQL page on CHAR and VARCHAR …
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?
27 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 …
Qual a diferença entre char, nchar, varchar e nvarchar?
Jun 21, 2017 · Qual a diferença entre usar os tipos de dados varchar e nvarchar? nvarchar existe em todo banco de dados SQL? Existe alguma diferença significante de performance entre …
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 - What does varchar (-1) mean? - Stack Overflow
Nov 11, 2009 · What is the meaning of varchar(-1) in SQL Server 2008? Is it an alternative for varchar(max)?
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 …
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 …
MySQL - Difference between CHAR and VARCHAR? - Stack Overflow
Oct 8, 2010 · A CHAR field is a fixed length, and VARCHAR is a variable length field. This means that the storage requirements are different - a CHAR always takes the same amount of space …
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 …