ALTER TABLE ADD增加多个字段外键约束

/* 创建表 及设置 主键 */

CREATE TABLE TABLE_USER

(

USER_ID INT IDENTITY(1,1) NOT NULL,

USER_NAME NVARCHAR(40) NOT NULL,

LAST_UPDATED_BY NVARCHAR(15),

LAST_UPDATED_DATE DATETIME,

CONSTRAINT USER_PK PRIMARY KEY (USER_ID)

);

/*ALTER TABLE 增加多个字段 */

ALTER TABLE TABLE_USER ADD

DEPARTMENT_ID INT NOT NULL

,COMPANY_ID INT NOT NULL

,TEMP_COL NVARCHAR(10)

;

/*ALTER TABLE 增加多个外键 */

ALTER TABLE TABLE_USER ADD

CONSTRAINT USER_DEPARTMENT_FK FOREIGN KEY(DEPARTMENT_ID) REFERENCES TABLE_DEPARTMENT(DEPARTMENT_ID)

,CONSTRAINT USER_COMPANY_FK FOREIGN KEY(COMPANY_ID) REFERENCES TABLE_COMPANY(COMPANY_ID)

;

/*ALTER TABLE 删除字段 */

ALTER TABLE TABLE_USER DROP COLUMN TEMP_COL;