UNICODE (Transact-sql)
Giriş deyimin ilk karakteri Unicode standardı tarafından tanımlanan tamsayı değeri döndürür.
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Transact-SQL Sözdizim Kuralları
Sözdizimi
UNICODE ( 'ncharacter_expression' )
Bağımsız değişkenler
- 'ncharacter_expression'
Olan bir ncharya nvarcharifade.
Dönüş Türleri
int
Açıklamalar
Sürümlerinde SQL Serverdaha önce SQL Server 2012, 0 ve 0xFFFF ile ucs-2 CODEPOINT UNICODE işlev verir. De SQL Server 2012ve sonraki sürümleri, sc alfabe, kullanırken UNICODE utf-16 CODEPOINT aralığı 0 ile 0x10FFFF.
Örnekler
A.UNICODE ve nchar işlevini kullanma
Aşağıdaki örnek UNICODEve NCHARişlevleri ilk karakteri UNICODE değeri yazdırma Åkergatan24-karakter dizesi ve gerçek ilk karakter yazdırmak Å.
DECLARE @nstring nchar(12);
SET @nstring = N'Åkergatan 24';
SELECT UNICODE(@nstring), NCHAR(UNICODE(@nstring));
DECLARE @nstring nchar(12);
SET @nstring = N'Åkergatan 24';
SELECT UNICODE(@nstring), NCHAR(UNICODE(@nstring));
Sonuç kümesi buradadır.
----------- -
197 Å
----------- -
197 Å
B.SUBSTRING, UNICODE ve convert kullanma
Aşağıdaki örnek SUBSTRING, UNICODE, ve CONVERTişlevleri karakter sayısı Unicode karakteri ve her karakter dizesindeki UNICODE değeri yazdırma Åkergatan 24.
-- 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
-- the string.
SET @position = 1;
-- Initialize the character string variable to the string to process.
-- Notice that there is an N before the start of the string, which
-- indicates that the data following the N is Unicode data.
SET @nstring = N'Åkergatan 24';
-- Print the character number of the position of the string you are at,
-- the actual Unicode character you are processing, and the UNICODE
-- value for this particular character.
PRINT 'Character #' + ' ' + 'Unicode Character' + ' ' + 'UNICODE Value';
WHILE @position <= DATALENGTH(@nstring)
-- While these are still characters in the character string,
BEGIN;
SELECT @position,
CONVERT(char(17), SUBSTRING(@nstring, @position, 1)),
UNICODE(SUBSTRING(@nstring, @position, 1));
SELECT @position = @position + 1;
END;
-- 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
-- the string.
SET @position = 1;
-- Initialize the character string variable to the string to process.
-- Notice that there is an N before the start of the string, which
-- indicates that the data following the N is Unicode data.
SET @nstring = N'Åkergatan 24';
-- Print the character number of the position of the string you are at,
-- the actual Unicode character you are processing, and the UNICODE
-- value for this particular character.
PRINT 'Character #' + ' ' + 'Unicode Character' + ' ' + 'UNICODE Value';
WHILE @position <= DATALENGTH(@nstring)
-- While these are still characters in the character string,
BEGIN;
SELECT @position,
CONVERT(char(17), SUBSTRING(@nstring, @position, 1)),
UNICODE(SUBSTRING(@nstring, @position, 1));
SELECT @position = @position + 1;
END;
Sonuç kümesi buradadır.
Character # Unicode Character UNICODE Value
----------- ----------------- -----------
1 Å 197
----------- ----------------- -----------
2 k 107
----------- ----------------- -----------
3 e 101
----------- ----------------- -----------
4 r 114
----------- ----------------- -----------
5 g 103
----------- ----------------- -----------
6 a 97
----------- ----------------- -----------
7 t 116
----------- ----------------- -----------
8 a 97
----------- ----------------- -----------
9 n 110
----------- ----------------- -----------
10 32
----------- ----------------- -----------
11 2 50
----------- ----------------- -----------
12 4 52
Character # Unicode Character UNICODE Value
----------- ----------------- -----------
1 Å 197
----------- ----------------- -----------
2 k 107
----------- ----------------- -----------
3 e 101
----------- ----------------- -----------
4 r 114
----------- ----------------- -----------
5 g 103
----------- ----------------- -----------
6 a 97
----------- ----------------- -----------
7 t 116
----------- ----------------- -----------
8 a 97
----------- ----------------- -----------
9 n 110
----------- ----------------- -----------
10 32
----------- ----------------- -----------
11 2 50
----------- ----------------- -----------
12 4 52