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SQL Server Data Types - NVARCHAR
Versions: SQL Server 2008, 2005, 2000, 7.0 and 6.5
SQL Server - NVARCHAR | |
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Syntax | NVARCHAR[(n | max)] |
Data | Variable-length character data in Unicode (UCS-2) character set |
Parameters | n is the maximum number of characters, optional |
Range | 1 ⇐ n ⇐ 4000, if max is specified, the maximum length is 2G |
Default | n is 1 |
Padding | Not right-padded with spaces to n (ANSI_PADDING option does not apply to NVARCHAR) |
Trailing Spaces | Not removed when the value is stored and retrieved |
Empty String | '' is treated as empty string, 0 characters in length |
Storage Size | n*2 + 2 bytes |
Synonyms | NATIONAL CHAR VARYING, NATIONAL CHARACTER VARYING |
Standards | ANSI SQL |
SQL Server NVARCHAR - Equivalents in Other Databases
Database | Data Type and Conversion | |
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Oracle | NVARCHAR2(n), 1 ⇐ n ⇐ 4000/charsize | NCLOB, 4G |
MySQL | NVARCHAR(n), 1 ⇐ n ⇐ 21845 | LONGTEXT, 4G |
PostgreSQL | VARCHAR(n), 1 ⇐ n ⇐ 1G | TEXT, 1G |
Sybase ASE | NVARCHAR(n), 1 ⇐ n ⇐ pagesize/@@ncharsize (page size is 2K, 4K, 8K or 16K) | UNIVARCHAR(n), 1 ⇐ n ⇐ pagesize/@@unicharsize, Unicode |
Informix | NVARCHAR(n,r), 1 ⇐ n ⇐ 255, LVARCHAR(n), 1 ⇐ n ⇐ 32739 | TEXT, 2G, CLOB, 4T |
HP Neoview | NVARCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns) | |
Ingres | NVARCHAR(n), 1 ⇐ n ⇐ 16000, Unicode - UTF-8 | LONG NVARCHAR, 2G, Unicode - UTF-8 |
Related Data Types in SQL Server
Data Types | ||
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Fixed-length Character Data | CHAR(n) | NCHAR(n) |
Variable-length Character Data | VARCHAR(n) | |
Character Large Objects | TEXT | NTEXT |
All Data Types