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upsert

Learn upsert in Apex with a construct-specific explanation, a unique example, a practical boundary, and a mastery check.

10 min read • Intermediate

upsert is an atomic Apex topic inside DML. The example below uses the actual construct named by the lesson rather than a generic placeholder.

Focus on what upsert changes: the input, binding, control path, object state, collection, runtime effect, or language contract. Then alter one value and verify that the behavior changes for a reason specific to this feature.

Topic-specific example

apex-04-03-upsert.cls
apex Try It Live
Account a=new Account(External_Id__c='EXT-7',Name='Demo'); upsert a External_Id__c;
Edge case / engineering note

Change the key input in this Apex example and predict the result first; the named construct should be the reason the behavior changes.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

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