Remove duplicate from oracle table# Database - 数据库
B*g
1 楼
seems (1=3) > 2 > 4, why? how can 1=3? 谁给说说?
Thanks
col0 is unique
DELETE FROM table_name A
WHERE A.col0> ANY (SELECT B.col0 FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2)
DELETE FROM table_name A
WHERE A.col0 > (SELECT MIN(B.col0) FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2)
DELETE FROM table_name A
WHERE EXSITS (SELECT 1 FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2 AND A.col0 > B.col0
)
DELETE FROM
Thanks
col0 is unique
DELETE FROM table_name A
WHERE A.col0> ANY (SELECT B.col0 FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2)
DELETE FROM table_name A
WHERE A.col0 > (SELECT MIN(B.col0) FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2)
DELETE FROM table_name A
WHERE EXSITS (SELECT 1 FROM table_name B
WHERE A.col1 = B.col1 AND A.col2 = B.col2 AND A.col0 > B.col0
)
DELETE FROM
