SELECT * FROM TABLE WHERE B=SUBSTRING(A,2,3)='16'
SELECT B FROM TABLE WHERE SUBSTRING(A,2,3)='16'
oracle和SQLserver:
select B字段 from [tablename] where A字段 like '_16%'
速度可能快点。
oracle
where substr(a , 2,2) = '16' ;
sql2000
where SUBSTRING(a , 2,2) = '16';