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boringsql.com | ||
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modern-sql.com
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| | | | | All functions of MERGE explained by example. Support tables show which systems support it. | |
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antonz.org
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| | | | | Inserting and updating data with a single query. | |
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brunoscheufler.com
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| | | | | In addition to the classic INSERT and UPDATE operations, there's another powerful data-modification technique, called upserting. Combining INSERTs for non-existing records and UPDATEs for existing ones, upserts enable various use cases to ensure a document exists and is modified accordingly, if it was created earlier, all while maintaining a concurrency-safe and atomic behavior.... | |
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www.sagargv.com
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