Create extra combined html table from sql database with php

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Before marking this post double, read carefully. I have a MySQL base with 3 tables, T1, T2 and T3. Their data are these:

T1:

name  val1  val2    
John    1    2    
Mary    1    2

T2:

name  val3  val4    
John    3    4    
Mark    1    2

T3:

name  val5  val6    
John    5    6    
Mark    3    4    
Mary    4    5

and I want to create the following combined html table:

name  val1  val2  val3  val4  val5  val6    
John   1      2    3      4    5      6    
Mary   1      2    -      -    4      5    
Mark   -      -    1      2    3      4

It seems very complicated to me. Any ideas how to do it?


SELECT TX.NAME,
(SELECT val1 FROM T1
    WHERE T1.NAME = TX.NAME) AS V1,
(SELECT val2 FROM T1
    WHERE T1.NAME = TX.NAME) AS V2,
(SELECT val3 FROM T2
    WHERE T2.NAME = TX.NAME) AS V3,
(SELECT val4 FROM T2
    WHERE T2.NAME = TX.NAME) AS V4,
(SELECT val5 FROM T3
    WHERE T3.NAME = TX.NAME) AS V5,
(SELECT val6 FROM T3
    WHERE T3.NAME = TX.NAME) AS V6
FROM (
SELECT NAME FROM T1
UNION
SELECT NAME FROM T2
UNION
SELECT NAME FROM T3) AS TX

We can do it with one sub-query per different column.

How to make a MySQL connection using PHP on a HTML Page, How to connect to a MySQL server, select a database, select a table and in the body of the html page, so additional php opening and closing� I have a table in a SQL database with the following fields: ID, Name, Email, University, Languages, and Experience. I want to create an html table that fetches data from SQL and outputs the last 10 results? How would I do that? I'm sorry if this is a very simple question, I have very little knowledge in PHP and SQL.


It's not that complicated.

If MySQL is your stronger language, write a query that joins the three tables with the desired values in the desired columns (into an array).

If PHP is your stronger language then write three queries that selects the values from each table (into distinct arrays). Then "join" those arrays into one array with the desired columns.

You want the result, in either case, to be an array with one "key" per user that has the 6 values.

You can iterate that result into an html table straightaway.

How to display a list of database data in an HTML table using PHP , How to display a list of database data in an HTML table using PHP. Video info; Activity; Collection Info. Description. Collection: PHP Programming Basics 5. Create a Main Index Page. Now create a main index. php page which contain the actual script of PHP which will show data from database into HTML table and also it will store all values in HTML array and on form submission, it will catch all selected values and print them on web page, you can also store it in your database.


Use union all and group by:

select name, sum(val1) as val1, sum(val2) as val2,
       sum(val3) as val3, sum(val4) as val4,
       sum(val5) as val5, sum(val6) as val6
from ((select name, val1, val2, null as val3, null as val4, null as val5, null as val6 from t1
      ) union all
      (select name, null, null, val1, val2, null, null from t2
      )
      (select name, null, null, null, null val1, val2 from t3
      )
     ) t
group by name;

Or, if you know that t3 has all the rows you want, use left join:

select t3.name, t1.val1, t1.val2,
       t2.val1 as val3, t2.val2 as val4,
       t2.val1 as val5, t2.val2 as val6
from t3 left join
     t1
     on t3.name = t1.name left join
     t2
     on t3.name = t2.name;

I don't recommend full join. It is a bit tricky to create the correct query -- and easy to make a mistake that can filter out rows.

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