SQL Server provides a number of data types that support all types of data that you may want to store. As you may have guessed, data type is an attribute that specifies the type of data that a column can store. It can be an integer, character string, monetary, date and time, and so...
-- being processed. The @nstring variable is the Unicode character -- string to process. DECLARE @position int, @nstring nchar(12) -- Initialize the current position variable to the first character in -- the string. SET @position = 1 -- Initialize the character string variable to the st...
Character data types that are either fixed-length, nchar, or variable-length, nvarchar, Unicode data and use the UNICODE UCS-2 character set. nchar [ ( n ) ] Fixed-length Unicode string data. n defines the string length and must be a value from 1 through 4,000. 实际上,就两层含义 1...
SQL 复制 -- The @position variable holds the position of the character currently -- being processed. The @nstring variable is the Unicode character -- string to process. DECLARE @position INT, @nstring NCHAR(12); -- Initialize the current position variable to the first character in --...
SQL 複製 -- The @position variable holds the position of the character currently -- being processed. The @nstring variable is the Unicode character -- string to process. DECLARE @position INT, @nstring NCHAR(12); -- Initialize the current position variable to the first character in --...
retval = WideCharToMultiByte( serverCodePage, // code page 0, // default unicodeColumnName, // wide-character string -1, // string is null terminated multibyteColumnName, // address of buffer for new string sizeof(multibyteColumnName), // size of buff...
NLS_NCHAR_CHARACTERSET("国家字符集")定义了 NCHAR,NVARCHAR2 和 NCLOB 列的编码并且在 9i 及以上版本已经是 Unicode了(参见Note 276914.1The National Character Set in Oracle 9i 10g and 11g)。 NLS_CHARACTERSET("字符集")定义了"普通的" CHAR,VARCHAR2,LONG 和 CLOB列编码,这些也可以被用于存放 Unicode。
When UTF-8 is used for characterEncoding in the connection string, it maps to the MySQL character set name utf8mb4. If the connection option connectionCollation is also set alongside characterEncoding and is incompatible with it, characterEncoding will be overridden with the encoding corresponding...
The rules also specify the code page that's used to store non-Unicode character data. Both Unicode and non-Unicode sorting are compatible with string comparisons in a particular version of Windows. This provides consistency across data types within SQL Server, and it lets developers sort strings...
Example 1 - Unicode data types in SQL Server Our table 'unicode" is defined as follows: CREATE TABLE [dbo].[unicode]( [firstName] [nvarchar](50) NULL, [lastName] [nvarchar](50) NULL ) ON [PRIMARY] If we create a simple Data Flow Task and an Excel Source and an OLE DB Destinatio...