How do I terate the select result in mysql

Question

0.00/5 (No votes)

See more:

Hi Team,

I need to iterate replace the first to second column when the condition matchs.

refer the below screenshot

Project

1018439 - 2018 Low Income State Resource
01343-067_Alaska
01343-067_New Hampshire
01343-067_Mississippi
01343-067_District of Columbia
01343-067_New Mexico

batchBookID	                         jf
1018439 - 2018 Low Income State Resource	01343-067_Alaska
	                                        01343-067_New Hampshire
	                                        01343-067_Mississippi
	                                        01343-067_District of Columbia

What I have tried:

for(Map<String,Object> eachRow:tableContent)
            {
                if(eachRow.get("batchBookID")==""){
                    String batchBookID = eachRow2.get("batchBookID").toString();
                    eachRow2.clear();
                    eachRow2.put("batchBookID", batchBookID);
                    eachRow.put("batchBookID", eachRow.get("jf_016"));

}}

Posted 26-Jan-19 2:36am

Gssankar

Updated 26-Jan-19 3:44am

Add a Solution

Comments

Gssankar 26-Jan-19 8:37am

I have tried in java but i like to do in mysql since performance is slow

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Wendelius · Answer 1 · 2019-01-26T03:45:00

Not sure if I understand the question correctly but you probably could use an UPDATE statement. Something like the following

SQL

UPDATE TableName a
SET BatchBookId = '1018439 - 2018 Low Income State Resource'
WHERE (BatchBookId IS NULL OR BatchBookId  = '')
AND EXISTS (SELECT 1
            FROM Project P
            WHERE TableName.JF = p.Column1)

You need to adjust the table and column names to the ones in your database schema.