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select * from A where len(id)=4 and left(id,2)=参数
select * from a where len(id)=2 and left(id,2)=@canshu
select * from tb where len(id)=2
select * from A where len(id)=2
select * from A where len(id)=4 and left(id,2)=参数
2、
select * from a where len(id)=2 and id like'11%'
select * from A where len(id)=2
select * from A where len(id)=4 and left(id,2)=参数
1、
select * from a where len(id)=2