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;