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Where union keyword used?

Updated: 12/15/2022
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Ravikantgupta9638

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10y ago

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The UNION keyword is commonly used, as part of a SELECT statement in the SQL language, to combine two tables, which must have identical or at least compatible structures, vertically. That is, records from BOTH tables are placed into a single result table. If, for example, each table has 1000 records, the resulting table would have 2000 records - assuming there are no duplicates.

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Q: Where union keyword used?
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