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Oracle > Learn Oracle Training > How do you update a table from another table in Oracle?
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How do you update a table from another table in Oracle?

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"Rajesh Kumar N: Guiding Young Minds from 1 to 12 with Expertise and Care"

Use UPDATE ... SET ... (SELECT ...) or MERGE: Example using UPDATE with JOIN: UPDATE target t SET t.column1 = (SELECT s.column1 FROM source s WHERE s.id = t.id) WHERE EXISTS (SELECT 1 FROM source s WHERE s.id = t.id); Example using MERGE: MERGE INTO target t USING source s ON...
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Use UPDATE ... SET ... (SELECT ...) or MERGE: Example using UPDATE with JOIN: UPDATE target t SET t.column1 = (SELECT s.column1 FROM source s WHERE s.id = t.id) WHERE EXISTS (SELECT 1 FROM source s WHERE s.id = t.id); Example using MERGE: MERGE INTO target t USING source s ON (t.id = s.id) WHEN MATCHED THEN UPDATE SET t.column1 = s.column1; read less
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