HANA删除重复记录的方法

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HANA删除重复记录的方法

对于未建主键的表出现重复记录需要删除时，可以利用"$rowid$"进行区分并做处理

delete from TESTA WHERE testid IN (
    ( SELECT testid FROM TESTA GROUP BY testid HAVING COUNT(testid) > 1) AND "$rowid$" NOT IN
 (SELECT MIN("$rowid$") FROM TESTA GROUP BY testid HAVING COUNT(*) > 1);