java - 如何添加约束以检查同一个表中的另一列中是否存在值？

@Entity @Table(name = "Persons", schema="PU") public class Persons { @Basic @Column(name = "PERSON_ID") private String personId @Basic @Column(name = "PERSON_NAME") private String personName @Basic @Column(name = "PERSON_NAME_COPY") private String personNameCopy }

DROP TABLE IF EXISTS dbo.Person; CREATE TABLE dbo.Person ( PERSON_ID INT NOT NULL PRIMARY KEY, PERSON_NAME VARCHAR(50)NOT NULL, PERSON_NAME_COPY VARCHAR(50)NOT NULL, CONSTRAINT CHK_PERSON_NAME_PERSON_NAME_COPY CHECK (PERSON_NAME=PERSON_NAME_COPY) ) GO INSERT dbo.Person(PERSON_ID,PERSON_NAME,PERSON_NAME_COPY) VALUES(1,'KUMAR','KUMAR') --THIS ROW IS TO BE REJECTED INSERT dbo.Person(PERSON_ID,PERSON_NAME,PERSON_NAME_COPY) VALUES(2,'JOHN','KUMAR') SELECT *FROM DBO.Person;

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如何添加约束以检查同一个表中的另一列中是否存在值？

问题描述

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1楼
Sergey 0 2023-02-01 19:42:03

如何添加约束以检查同一个表中的另一列中是否存在值？

问题描述

1 条回复

1楼 Sergey 0 2023-02-01 19:42:03

1楼
Sergey 0 2023-02-01 19:42:03