You can create INSERT queries using QueryBuilder. Examples:

await dataSource
    .createQueryBuilder()
    .insert()
    .into(User)
    .values([
        { firstName: "Timber", lastName: "Saw" },
        { firstName: "Phantom", lastName: "Lancer" },
    ])
    .execute()

This is the most efficient way in terms of performance to insert rows into your database. You can also perform bulk insertions this way.

Raw SQL support

In some cases when you need to execute SQL queries you need to use function style value:

await dataSource
    .createQueryBuilder()
    .insert()
    .into(User)
    .values({
        firstName: "Timber",
        lastName: () => "CONCAT('S', 'A', 'W')",
    })
    .execute()

This syntax doesn’t escape your values, you need to handle escape on your own.

Update values ON CONFLICT

If the values you are trying to insert conflict due to existing data the orUpdate function can be used to update specific values on the conflicted target.

await datasource
    .createQueryBuilder()
    .insert()
    .into(User)
    .values({
        firstName: "Timber",
        lastName: "Saw",
        externalId: "abc123",
    })
    .orUpdate(
        ["firstName", "lastName"],
        ["externalId"],
    )
    .execute()