Solved

update based in select

Posted on 2013-01-29
3
315 Views
Last Modified: 2013-01-30
Hello Guys,

I have 2 tables and I need to mount an update based on the results of a select. example:

Table1
name, phone, record, age

Table2
name, phone, record, age

Both tables have the same structure. I would like to check if customers table1 exists in table2 if there is an update to make updating the data from table1 to table2
0
Comment
Question by:eduardo12fox
3 Comments
 
LVL 13

Expert Comment

by:AielloJ
ID: 38833590
eduardo12fox,


INSERT INTO table2 (name, phone, record, age)
SELECT name, phone, record, age
FROM table1
WHERE (name, phone, record, age) NOT IN
       (SELECT name, phone, record, age
        FROM table2);

Best regards,

AielloJ
0
 
LVL 24

Accepted Solution

by:
johanntagle earned 500 total points
ID: 38833765
You want to update if there are common records, not insert new records, right?  Assuming the name column is the unique identifier:

update table2 t2 join table1 t1 on t2.name=t1.name
set t2.phone=t1.phone, t2.record=t1.record, t2.age=t1.age;

If you want to both update existing and insert those in table1 that are not in table2:

1.  Make sure name column is either primary key or has unique index.
2. Execute:

replace into table2 (name, phone, record, age)
select name, phone, record age from table1;

See http://dev.mysql.com/doc/refman/5.5/en/replace.html for more info on the REPLACE keyword.
0
 

Author Closing Comment

by:eduardo12fox
ID: 38834821
Thank you
0

Featured Post

Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
hasing a url 16 28
PHP curl issue VERBOSE output 18 42
Mysql Left Join Case 10 54
How do uses indexes to maximize MySQL Searches 14 27
Build an array called $myWeek which will hold the array elements Today, Yesterday and then builds up the rest of the week by the name of the day going back 1 week.   (CODE) (CODE) Then you just need to pass your date to the function. If i…
This article discusses how to create an extensible mechanism for linked drop downs.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
This tutorial will teach you the core code needed to finalize the addition of a watermark to your image. The viewer will use a small PHP class to learn and create a watermark.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question