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Editorial Team
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Asked: 2026-06-07T00:14:37+00:00

my question is how to insert values into DB in sql. i have a

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my question is how to insert values into DB in sql. i have a USER who can have multiple emails. how can i insert multiple emails into one object? i dont want to add a completely new user object into a new row. i just want to update and append new email into email field of an existing user in db.

i did this: 

JPA.em().createQuery
        ("insert into User (email) select (email) from User where USERNAME=? VALUES (?)")
        .setParameter(1, username).setParameter(2, email).executeUpdate();

but it is not working, thanks for help !!

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1 Answer

  1. Editorial Team

    Get the user from the database, concatenate its existing email with the new value, and save the user.

    JPA uses entities and generates SQL queries for you. You tyically use queries only to get entities from the database. And those queries are JPQL queries, not SQL queries.

    And it looks like your schema is not normalized correctly. One User entity should have many Email entities (OneToMany associations), rather than stuffing all the emails in a single CLOB field of the user. This is how you could search and get individual emails from the database, and get users without all their emails if you don’t need them.

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