ORACLE中的五种约束
CREATE TABLE TABLENAMEEXAMLE(
PRIMARYKEYFILED NUMBER(2) CONSTRAINT PK_ID PRIMARY KEY,
NULLEXAMPLEFIELD VARCHAR2(8) NOT NULL,
FOREIGNKEYFIELD NUMBER(2) CONSTRAINT FK_ID FOREIGN KEY(FOREIGNKEYFIELD) REFERENCES ANOTHERTABLE(PRIMARYKEYFIELDNAME),
FILEDUNIQUEEXAMPLEFIELD VARCHAR2(64) UNIQUE,
CHECKEXAMPLEFIELD NUMBER(7,2) CONSTRAINT CONSTRAINTNAME CHECK(CHECKEXAMPLEFIELD>0 AND CHECKEXAMPLEFIELD<=3000)
}
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转载自xixiyanqi.iteye.com/blog/1891102
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