How to store value from executed Query?

Question

0.00/5 (No votes)

See more:

Hello Experts,

I have a question regarding MySQL.
Suppose My query is like below

SQL

select col1 from table1 where col2='value'

now what ever I get in col1 should be a value to second query where clause like below

SQL

select col1,col2,col3 from table2 where col6='col1 value from above query'

These things should be in a stored procedure.

Can anyone help me with this? I haven't tried any because didn't know how to do. I didn't have any basic idea about these as well. any tutorials are also much appreciated.
Couldn't find MySQL in Tags so I select SQL

Posted 20-Feb-15 4:22am

sudevsu

Updated 20-Feb-15 4:53am

CHill60

v3

Add a Solution

Comments

PIEBALDconsult 20-Feb-15 10:59am

Subqueries tend to perform poorly; I'd use a JOIN instead.

sudevsu 20-Feb-15 11:58am

Correct I agree Sub queries are not good at performance. What if I have more than 6 queries that I want to save result in variable and pass that as clause in next query in my Stored procedure? can that be possible? If yes Can you show me how with the above two queries?

2 solutions

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)

Peter Leow · Accepted Answer · 2015-02-20T04:53:00

Solution 1

Learn to create mysql stored procedure[^]
As for the sql query, try this:

SQL

Select col1, col2, col3 from table2 where col6 in 
(
   Select col1 from table1 where col2='value'
)

Posted 20-Feb-15 4:53am

Peter Leow

Comments

sudevsu 20-Feb-15 11:56am

But what if I have something 6 or more like these two queries. I want to use something like result should be in some variable. Can this be possible?

CHill60 · Accepted Answer · 2015-02-20T04:56:00

Solution 2

And a MySQL tutorial site http://www.mysqltutorial.org/[^]

Posted 20-Feb-15 4:56am

CHill60