1、查找表中多余的重復記錄(多個字段)
select * from test group by column1, column2, column3 having count(*)>1
2、刪除表中多余的重復記錄(多個字段),只留有rowid最小的記錄
delete from test where test.rowid not in (select min(test.rowid) from test group by column1, column2, column3)
1、查找表中多余的重復記錄(多個字段)
select * from test group by column1, column2, column3 having count(*)>1
2、刪除表中多余的重復記錄(多個字段),只留有rowid最小的記錄
delete from test where test.rowid not in (select min(test.rowid) from test group by column1, column2, column3)