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Editorial Team
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Asked: 2026-05-21T09:37:56+00:00

According to the ANSI SQL-1992 standard, page 132 , this is the syntax for

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According to the ANSI SQL-1992 standard, page 132, this is the syntax for the ANSI substring function:

<character substring function> ::=
    SUBSTRING <left paren> <character value expression> FROM <start position>
    FOR <string length> ] <right paren>

A quick test in SQL developer on an oracle 10g schema:

SELECT SUBSTRING('ASDF' FROM 1 FOR 1) FROM DUAL;

Results in:

ORA-00907: missing right parenthesis
00907. 00000 -  "missing right parenthesis"
*Cause:    
*Action:
Error at Line: 1 Column: 28

Does this mean Oracle 10g does not comply with this particular ANSI standard?

I simply would like to use an ANSI standard substring function instead of a vendor specific one.

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1 Answer

  1. Editorial Team

    oracle documentation for SUBSTR

    but you can check this http://troels.arvin.dk/db/rdbms/#functions-SUBSTRING

    Doesn’t provide the standard SUBSTRING
    function. Provides
    SUBSTR(input,start-pos[,length])
    instead (i.e. length is optional).
    Oracle provides a number of
    SUBSTR-variants (SUBSTRB, SUBSTRC,
    SUBSTR2, SUBSTR4, same syntax as for
    SUBSTR), mainly for handling various
    kinds of non-latin-only string-types.
    Oracle doesn’t have support for
    string-extraction with the special
    SQL-style regular expressions.
    Instead, it has the REGEXP_SUBSTR
    function which offers string
    extraction, using POSIX-style regular
    expression pattern matching.

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