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select code,price,ctime,
lag(code) over(partition by code order by ctime) pcode,
lag(price) over(partition by code order by ctime) pprice,
lag(ctime) over(partition by code order by ctime) pctime from temp_test
select code,price,ctime,
lag(code) over(order by ctime) pcode,
lag(price) over(order by ctime) pprice,
lag(ctime) over(order by ctime) pctime from temp_test