‘数据格式
分组取第一条的效果
sql
SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn, test1.* FROM test1) WHERE rn = 1 ;
‘数据格式
分组取第一条的效果
sql
SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY x ORDER BY y DESC) rn, test1.* FROM test1) WHERE rn = 1 ;