存儲(chǔ)過(guò)程如何寫(xiě)一個(gè)for循環(huán)？SQL Server 中沒(méi)有For循環(huán)，可以使用while循環(huán)代替，另外你寫(xiě)的存儲(chǔ)過(guò)程還有幾處有問(wèn)題，一并給你改過(guò)來(lái)了。CREATE PROCEDURE AddStude

存儲(chǔ)過(guò)程如何寫(xiě)一個(gè)for循環(huán)？

SQL Server 中沒(méi)有For循環(huán)，可以使用while循環(huán)代替，另外你寫(xiě)的存儲(chǔ)過(guò)程還有幾處有問(wèn)題，一并給你改過(guò)來(lái)了。CREATE PROCEDURE AddStudents AS Begin Declare @n bigint Declare @Sql nvarchar(225) set @n=0while @n

sqlserver存儲(chǔ)過(guò)程中循環(huán)遍歷結(jié)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怎么會(huì)有27 條記錄呢，除非你的表 一共就27條記錄吧。用游標(biāo)或臨時(shí)表--游標(biāo)declare youbiao1 for 查詢1open youbiao1fetch next from youbiao1 into 變量while @@FETCH_STATUS = 0begin 里面一次套用end--臨時(shí)表declare @ID intset @ID = 1while Exists(select * from 表)begin --處理 -- set @ID = @ID 1end

oracle存儲(chǔ)過(guò)程loop字符串遍歷？

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