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OneToOne unidirectional mapping


public class ReportMetricCategory{

@OneToOne
@JoinColumn(name="REF_ACCOUNT_ID", nullable = true)
private Account referenceAccount;

@Column(name = "CATEGORY_NAME",nullable = false, length = 127)
private String categoryName;

....

Add  account_id in report metric category table. we do nothing in account table.

Use “@JoinColumn” when mapping entity,  “@Column” for mapping normal property.

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