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  • Oracle Data Types NVARCHAR2 (zz)

    Versions: Oracle 11g, 10g, 9i, 8i and 7.3

    Oracle - NVARCHAR2
    Syntax NVARCHAR2(n)
    Data Variable-length character data in Unicode - UTF-8 or UTF-16
    Parameters n is the maximum number of characters
    Range 1 ⇐ n ⇐ 4000/charsize
    Default n is mandatory
    Padding Not right-padded with spaces to n
    Trailing Spaces Not removed when the value is stored and retrieved
    Empty String '' is treated as NULL
    Error Handling Error is raised if the value is too long
    Storage Size Actual entry length
    Synonyms NATIONAL VARCHAR, NATIONAL CHAR VARYING, NATIONAL CHARACTER VARYING
    Standards Oracle Extension


    Oracle NVARCHAR2 - Equivalents in Other Databases //z 2012-08-01 15:29:34 IS2120@CSDN.T630071441 [T11,L241,R3,V301]

    Database Data Type and Conversion
    SQL Server NVARCHAR(n | max), 1 ⇐ n ⇐ 8000, 2G ifmax is specified
    MySQL NVARCHAR(n), 1 ⇐ n ⇐ 21845, Unicode - UTF-8
    PostgreSQL VARCHAR(n), 1 ⇐ n ⇐ 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
    HP Neoview NVARCHAR(n), 1 ⇐ n ⇐ (32708 - size of other columns)

    Related Data Types in Oracle

    Data Types
    Fixed-length Character Data CHAR(n) NCHAR(n)  
    Variable-length Character Data VARCHAR2(n)    
    Character Large Objects CLOB NCLOB LONG
    //z 2012-08-01 15:29:34 IS2120@CSDN.T630071441 [T11,L241,R3,V301]
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  • 原文地址:https://www.cnblogs.com/IS2120/p/6745868.html
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