SELECT end AS row_num_v_, case when @v <> _apply.PATIENT_ID then @v := _apply.PATIENT_ID else @v end AS row_num_v, _apply.ID, _apply.MEDICAL_CARD_NO, _apply.EXPERT_RESOURCE_ID, _apply.PATIENT_ID, _apply.DEPT_ID, _apply.REG_DATE, _apply.COMPANY_ID FR
UPDATE customer SET OrderNo = ( SELECT afterOrder.rowNum FROM ( SELECT @row_number := CASE WHEN @customer_no = s.DepartmentId THEN @row_number + ELSE END AS rowNum, @customer_no := s.DepartmentId AS stu_DepartmentId, s.id FROM customer s, ( SELECT @r
mysql 行号的实现 Select id,(@rowNum:=@rowNum+1) as rowNo From first,(Select (@rowNum :=0) ) bOrder by first.id Desc 这样就可以实现mysql 的行号 获取指定行的数据可以使用limit 具体的使用如下: select * from first limit num,1 即可
表结构设计: 实现select取行号 sql局部变量的2种方式 set @name='cm3333f'; select @id:=1; 区别:set 可以用=号赋值,而select 不行,必须使用:= 方法1: 由上述可得出,我们可以通过局部变量的方式来获取行号,sql如下: set @rownum=0: from test order by pname desc,pview desc ; 可实现,但需要给他先设置局部变量,在实际项目应用中,不方便 由此得出进阶版本: ,) from test
SELECT *, Row_Number() OVER (partition by deptid ORDER BY salary desc) rank FROM employee Row_Number()显示行号,加上partition by还能分组排序显示行号.就这么一句sql,每次忘记这个Row_Number()回头一看就什么都明白了.