--------------- regexp_like(需要判断的字段名,'^+?[1-9][0-9]*$') 
SELECT
 ID,
 PERIODSID,
 (case   when  regexp_like(LEADERNUM,'^+?[1-9][0-9]*$')   then   TO_NUMBER(LEADERNUM)     else  0  end) LEADERNUM  from  EXOA.T_week_meeting 





 

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