以及interbase6.5里明明有 substring 函数,但在使用的时候 select substring(ro_no,1,3) from ro_table; An error was found in the application program input parameters for the SQL statement. Dynamic SQL Error. SQL error code = -804. Function unknown. SUBSTRING.
select substring(ro_no from 1 for 3 ) from ro_table; Invalid token. Dynamic SQL Error. SQL error code = -104. Token unknown - line 2, char 22. from.
select substring(ro_no,1,3) from ro_table;
An error was found in the application program input parameters for the SQL statement.
Dynamic SQL Error.
SQL error code = -804.
Function unknown.
SUBSTRING.
Invalid token.
Dynamic SQL Error.
SQL error code = -104.
Token unknown - line 2, char 22.
from.