Is there any difference between the following two statements in Oracle?

SELECT * INTO tableA FROM tableB;

INSERT INTO tableB SELECT * FROM tableA;

Thanks.
thomaszhwangAsked:
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sdstuberCommented:
the first is only legal in pl/sql and only if the query returns exactly one row and tableA is actually a variable, like a record - NOT an actual database table.

the second is legal sql syntax anywhere and will copy data between database tables.
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thomaszhwangAuthor Commented:
Oh really?  I didn't know that.  In Vertica, both work the same way.  I will also test this out tomorrow.  Thanks sdstuber.  You help me a lot! :)
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YZlatCommented:
INSERT INTO used when table exists, and SELECT INTO - when table does not exist

http://www.blackwasp.co.uk/SQLSelectInsert.aspx
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sdstuberCommented:
YZlat, that was covered already yesterday
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thomaszhwangAuthor Commented:
@sdstuber, I think you are right.

@YZlat, I tried to SELECT INTO a non-existing table, but it still failed.  The following is my SQL.

SELECT col1, col2 INTO table2 FROM table1;
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thomaszhwangAuthor Commented:
Thanks.
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sdstuberCommented:
In pl/sql you could do

SELECT * BULK COLLECT INTO tableA FROM tableB;

if tableA is a collection, see the pl/sql guides in the oracle documentation for more info
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