Sql Top 1 Kullanımı. This solution can be used to get the top n most recent rows for each partition in the example n is 1 in the where statement and partition is docid. Plain text mesajın aslı merhaba.
Scan count 1 logical reads 3 physical reads 0 read ahead reads 0 lob logical reads 0 lob physical reads 0 lob read ahead reads 0. Select tdocid tstatus tdatecreated from select a rownumber over partition by docid order by datecreated desc as rnk from doc a t where trnk 1. Select columnnames from tablename order by columnnames fetch first number rows only.
Cpu time 0 ms elapsed time 1 ms.
Scan count 1 logical reads 3 physical reads 0 read ahead reads 0 lob logical reads 0 lob physical reads 0 lob read ahead reads 0. Found this to be much faster on larger data sets dotnetdublin. Essentially the select top 1 method is used to find the min or max record for a particular columns value. Mysql supports the limit clause to select a limited number of records while oracle uses fetch first n rows only and rownum.