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How to sort varchar id on basis integer in it using mysql


How to sort varchar id on basis integer in it using mysql

By : David Solsona
Date : November 29 2020, 09:01 AM
I hope this helps . Testcase_id in my system are varchar and generated by trigger and I want to sort them on basis of the integer value of the varchar id . I have been so far used three queries but not working at all. I have also tried with the function which converts string to integer. Here I am mentioning that function also and my query well in this query i have not used function. , You have to use -1 instead of 2 inside SUBSTRING_INDEX:
code :
select t.Testcase_id,      
       CONVERT(SUBSTRING_INDEX(t.Testcase_id,'_', -1),UNSIGNED INTEGER) as num 
from testcase_master t 
order by num


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How to concat datatypes like integers(integer with integer) & varchar(varchar with varchar) in mysql?

How to concat datatypes like integers(integer with integer) & varchar(varchar with varchar) in mysql?


By : Limbones
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Use CONCAT
http://dev.mysql.com/doc/refman/5.1/en/string-functions.html#function_concat
code :
SELECT CONCAT(1, 2);
-- "12"

SELECT CONCAT('foo', 'bar');
-- "foobar"

SELECT CONCAT(1, 'bar');
-- "1bar"
Sort a query by a varchar field(which have numerical values) on numerical basis with Jooq

Sort a query by a varchar field(which have numerical values) on numerical basis with Jooq


By : Prateek
Date : March 29 2020, 07:55 AM
Any of those help Have you tried casting your VARCHAR field into a numeric DataType? You could do it like this:
code :
factory.selectFrom(ScoreCard.SCORE_CARD)
       .orderBy(OloScoreCard.SCORE_CARD_ID.cast(Integer.class).descending())
       .limit(0, 1);
Convert varchar to integer and sort in a MySql query

Convert varchar to integer and sort in a MySql query


By : user2911945
Date : March 29 2020, 07:55 AM
this one helps. A column in table has numbers stored as varchar. Some values have > sign (e.g, >128).
code :
SELECT CASE WHEN INSTR(col_name,'>') = 0 THEN CAST(SUBSTR(col_name,2) as UNSIGNED) 
       ELSE CAST(col_name as UNSIGNED) END as MIC
FROM mytable
ORDER BY MIC
MySQL Sort varchar by its integer

MySQL Sort varchar by its integer


By : Vadim Zalyubovskiy
Date : March 29 2020, 07:55 AM
it fixes the issue How do I sort a column (VARCHAR) like this: , A simple way to do this assuming the prefixes are the same length:
code :
order by length(name), name
order by substring_index(name, '#', -1) + 0
How to add integer and Varchar(20) and store as Varchar(20) in mysql

How to add integer and Varchar(20) and store as Varchar(20) in mysql


By : Matěj Nikl
Date : March 29 2020, 07:55 AM
will help you If I understand the problem correctly, you want to update the record in the DB according to the itemcode. So you just cast the existing value to number, add your additional value (with +) and cast it back.
code :
int num = 0;
try {
    num = Integer.parseInt(s2);
} catch (Exception e) {
    System.out.println('Nope, that was not a number');
    //Do something else?
}
String insertQuery = "UPDATE spareparts SET quantity = cast(cast(quantity as integer)+"+num+" as char(20)) where itemcode = "+s1+";";

try {
    connection = DriverManager.getConnection(...); //add your data
    preparedStatement = connection.prepareStatement(sql)
    preparedStatement.executeUpdate();
} catch (Exception e) {
    //Something broke
}
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