java - How to extract numbers? -

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i have database that:

stockcode stockname stockstart stockfinish stockcurrentnumber __________________________________________________________ 100       water         1          10          ?

now how code looks this...

stockcode stockname stockstart stockfinish stockcurrentnumber __________________________________________________________ 100001       water         1          10          001  100002       water         1          10          002  100003       water         1          10          003  100004       water         1          10          004  100005       water         1          10          005  100006       water         1          10          006  100007       water         1          10          007  100008       water         1          10          008  100009       water         1          10          009  100010       water         1          10          010

i appreciate if help

sorry, edit, have 1 record, , want duplicated in range stockstart stockfinish

try 

select    concat(`stockcode`,lpad(@sno + 1,3,0)) stockcode, `stockname`,  `stockstart`, `stockfinish`, @sno := lpad(@sno + 1,3,0) stockcurrentnumbe  table1, (select @sno := 000) t

fiddle

edit

for update can create new table (for reference see fiddle demo) using below query , once done can rename table actual table , below example have use int() not smallint

create table table2     (`stockcode` int(11),      `stockname` varchar(5),      `stockstart` int,      `stockfinish` int,       `stockcurrentnumber` int(11)) ; insert table2     (`stockcode`,       `stockname`,       `stockstart`,      `stockfinish`,       `stockcurrentnumber`)  select    concat(`stockcode`,lpad(@sno + 1,3,'0')) stockcode,    `stockname`,    `stockstart`,   `stockfinish`,   @sno := lpad(@sno + 1,3,'0') stockcurrentnumber  table1, (select @sno := 000) t ;

the data in column stockcurrentnumber of table2 have data without leading zeros because datatype integer , 001 =1 leading zeros fetch results can use lpad(stockcurrentnumber,3,'0') more see lpad docs , query not harder 1 have used variable generate auto incremented values stockcurrentnumber column , concat() combine values auto incremented value , stockcode concat(stockcode,lpad(@sno + 1,3,'0')) stockcode,hope makes sense

fiddle 2


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