Most programmers may already know the main different between CHAR and VARCHAR - Thefirst onesupports fixed-length data and the second one supports variable-lengths of data. Some people may think, since VARCHAR
当存储CHAR值时,MySQL会删除字符串中的末尾空格(在MySQL 4.1和更老版本中VARCHAR 也是这样实现的——也就是说这些版本中CHAR和VARCHAR在逻辑上是一样的,区别只是在存储格式上)。 同时,CHAR值会根据需要采用空格进行剩余空间填充,以方便比较和检索。但正因为其长度固定,所以会占据多余的空间,也是一种空间换时间的策略...
CHAR is useful if you want to store very short strings, or if all the values are nearly the same length. For example, CHAR is a good choice for MD5 values for user passwords, which are always the same length. CHAR is also better than VARCHAR for data that’s changed frequently, becaus...
Difference between MySQL Text vs Varchar MySQL Varchar defines a data type string with a variable length that stores a value as a length prefix of 1-byte or 2-byte plus actual data. Besides Varchar and Char data types, the MySQL server supports the TEXT data type, including additional featur...
CHARCHARFixed-length character string VARCHARVARCHARVariable-length character string with a user-defined limit DATEDATECalendar date (year, month, day) TIMETIMETime (without time zone) TIMESTAMPTIMESTAMPDate and time (without time zone) TIMESTAMPDATETIMETime (without time zone) ...
Please try to give the differences between TEXT and VARCHAR(MAX) in sql server 2005, please dont try to give the definitions of TEXT and VARCHAR(MAX). #268897 23 Jul 2008 08:16 3 Hi, The datatype TEXT is limited to 4000 chararcters wherein the new datatype Varchar(max) is meant ...
Learn the differences between Java programming language data types and SQL Server data types and how the JDBC Driver for SQL Server helps with conversions.
TheIBM Data Server Driver for JDBC and SQLJreturns data from aResultSet.getStringcall for a CHAR FOR BIT DATA or VARCHAR FOR BIT DATA column as a lowercase hexadecimal string. The DB2 JDBC Type 2 Driver returns the data as an uppercase hexadecimal string. ...
SQL Server security permission differences between select and sp_executesql within stored procedureThe ...
From the names alone we can see that Latin1_General_100_BIN2 and Latin1_General_100_BIN are both “Latin1_General_100” collations, and the difference between them is just “_BIN” vs “_BIN2” (i.e. the binary comparison type). For non-UTF-8 VARCHAR data this differen...