oracle函数 VSIZE(X)

【功能】返回X的大小(字节)数

【参数】x

select vsize(user),user from dual;

返回：6 asdied

　　select length('adfad合理') "bytesLengthIs" from dual --7

　　select lengthb('adfad') "bytesLengthIs" from dual --5

　　select lengthb('adfad合理') "bytesLengthIs" from dual --9

　　select vsize('adfad合理') "bytesLengthIs" from dual --9

　　select lengthc('adfad合理')"bytesLengthIs" from dual --7

　　lengthb=vsize

　　lengthc=length