如何看某个表或者某个字段是否做过update statistics

select systables.tabname,

syscolumns.colname,

sysdistrib.constructed,mode

from sysdistrib,systables,syscolumns

where systables.tabid > 99

and systables.tabid = syscolumns.tabid

and sysdistrib.tabid=systables.tabid

and sysdistrib.colno = syscolumns.colno

group by 1,2,3,4

order by tabname,colname;

dnsfm的解释清晰且容易理解