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1. how do you delete duplicate rows in a table?
2. can you disable and enable primary key?
3. how do you move tables from one tablespace to another
tablespace?????
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Answer Posted / anil kumar prajapati
1. DELETE FROM
table_name A
WHERE
a.rowid >
ANY (
SELECT
B.rowid
FROM
table_name B
WHERE
A.col1 = B.col1
AND
A.col2 = B.col2
);
2.CREATE TABLE table_name
(
column1 datatype null/not null,
column2 datatype null/not null,
...
CONSTRAINT constraint_name PRIMARY KEY (column1, column2,
... column_n)
);
3.ALTER TABLE <TABLE NAME to be moved> MOVE TABLESPACE
<destination TABLESPACE NAME>
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