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存储过程定义数组并遍历 存储过程如何写一个for循环?

浏览量:1549 时间:2021-03-11 01:57:27 作者:admin

存储过程如何写一个for循环?

SQL Server 中没有For循环,可以使用while循环代替,另外你写的存储过程还有几处有问题,一并给你改过来了。CREATE PROCEDURE AddStudents AS Begin Declare @n bigint Declare @Sql nvarchar(225) set @n=0while @n

sqlserver存储过程中循环遍历结果集?

sql1=select * from (select *, row_number() over(order by username ) as rowNumber from users where regfrom="&admin&") as t where t.rowNumber > 0 and t.rowNumber <= 0 30 order by username怎么会有27 条记录呢,除非你的表 一共就27条记录吧。用游标或临时表--游标declare youbiao1 for 查询1open youbiao1fetch next from youbiao1 into 变量while @@FETCH_STATUS = 0begin 里面一次套用end--临时表declare @ID intset @ID = 1while Exists(select * from 表)begin --处理 -- set @ID = @ID 1end

oracle存储过程loop字符串遍历?

declare x varchar2(20)v_length inty intv_str varchar2(1)begin x:="wqr3331412rr" select length(x) into v_length from dual y:=1 while y<=v_length loop select substr(x,y,1) into v_str from dual dbms_output.put_line(v_str) y:=y 1 end loopend

直接运行吧,结果如图

存储过程定义数组并遍历 mysql游标遍历结果集 db2存储过程游标遍历

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