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我想声明g_num,数字数据类型的大小,它给出了一个错误,但在varchar2的情况下,它不会。sql plus中声明变量关键字的变量(oracle 9i)?
variable g_name varchar2(5);//correct accept size for varchar 2
variable g_num number(23);//Gives an error
" VAR[IABLE] [ <variable> [ NUMBER | CHAR | CHAR (n [CHAR|BYTE]) |
VARCHAR2 (n [CHAR|BYTE]) | NCHAR | NCHAR (n) |
NVARCHAR2 (n) | CLOB | NCLOB | REFCURSOR ] ]"
请建议!