Use update() if you are sure that the session does not contain an already persistent instance with the same identifier, and merge() if you want to merge your modifications at any time without consideration of the state of the session. In other words, update() is usually the first method ...
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I'm able to find difference between 2 tables by using "merge" in sql and i dumped into one table but unable to insert newly found records and updated records into db2 database . Is...
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'VARCHAR' is not a recognized built-in function name. 'WHEN MATCHED' cannot appear more than once in a 'UPDATE' clause of a MERGE statement. "EXECUTE AT" with Dynamic Linked Server Name "explicit value must be specified for identity column in table" error in SQL 2000 "FROM clause have ...
Microsoft has developed or licensed a number of SQL variants. Yes, they’re all procedural languages used to manage relational databases, but they’re used differently. They were also created by different organizations. Here’s the differences between SQ
What's the difference between git reset --mixed, --soft, and --hard? 问题 I'm looking to split a commit up and not sure which reset option to use. I was looking at the pageIn plain English, what does "git reset" do?, but I realized I don't really understand what the git inde...
"IF NOT EXISTS" in SQL?Here are 4 examples illustrating when you would use IF EXISTS and when...
SQL - Difference between HASH JOIN And MERGE JOIN Hash joing is implemented in CBO and comparatively faster. Merge joing is comparatively slow because both the row sources are to be sorted before merging.. 1 Answers are available for this question.
Finally, we can have a framework-like integration, for example, Spring Data JPA, with pre-defined interfaces to access entities but still using JPA and an entity manager under the hood. In this tutorial, we’ll talk about the difference between Spring Data JPA and JPA. We’ll also explain...