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Insert

Author

Topic

peace
Constraint Violating Yak Guru

420 Posts

Posted - 2012-04-04 : 05:25:06

insert into tableA (column1, column2, column3)
select distinct c1, c2, c3 from tableB

I'm scheduling a daily basis to insert into tableA.
How can I avoid inserting the same data?

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2012-04-04 : 05:31:18

[code]
WHERE NOT EXISTS
(
SELECT *
FROM tableA x
WHERE x.c1 = tableB.c1
AND x.c2 = tableB.c2
. . .
)
[/code]

KH
[spoiler]Time is always against us[/spoiler]

peace
Constraint Violating Yak Guru

420 Posts

Posted - 2012-04-04 : 05:35:56

Where shall I apply the Insert command?

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2012-04-04 : 06:07:03

[code]
insert into tableA (column1, column2, column3)
select distinct c1, c2, c3
from tableB
WHERE NOT EXISTS
(
SELECT *
FROM tableA x
WHERE x.c1 = tableB.c1
AND x.c2 = tableB.c2
. . .
)
[/code]

KH
[spoiler]Time is always against us[/spoiler]

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