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My table is this:
CLASS
5
5
6
6
6
7
8
8
8
9
10
Is it possible to retrieve class values 5,6,7,8,9,10 without retrieving duplicate class values?
SELECT DISTINCT CLASS FROM MYTABLE;
You can use DISTINCT to achieve it.
Syntax:
SELECT DISTINCT column_name FROM table_name;
Based on above syntax, your query should be
SELECT DISTINCT CLASS FROM 'table_name'
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I have the follow table structure:
COLUMN1 COLUMN2 COLUMN3
1 6 1
3 3 7
4 8 9
I'd like to get the average of all columns. It's possible to get this with a single SQL command, with PHP prepared statements?
Thanks
I think you want to take the averages of each columns seperately. Above answer works but another answer can be as like below;
SELECT
SUM (COLUMN1)/ COUNT(COLUMN1) AS AVG1,
SUM (COLUMN2)/ COUNT(COLUMN2) AS AVG2,
SUM (COLUMN3)/ COUNT(COLUMN3) AS AVG3
FROM TABLE
SELECT
AVG (COLUMN1) AS AVG1,
AVG (COLUMN2) AS AVG3,
AVG (COLUMN3) AS AVG3
FROM TABLE
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I have a table that have a CP value (numeric), for example, 28030, 28060, 27100 etc. And the user can introduce a number via PHP. I want to, having this number for example, 28050, order in MYSQL my table putting 28060 as the first position.
This is the basic of my table:
SELECT * FROM `tiendas` ORDER BY `CP`
ABS() will work. Here's a query that does the job:
SELECT
CP
FROM tiendas
ORDER BY ABS(CP- 28050) ASC
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I have about 30 000 records in database, and I must create 10 cron jobs for these:
job 1 fetches records where column `id` is 0,10,20,30, etc.
job 2 fetches records where column `id` is 1,11,21,31, etc.
and so forth.
How can I approach this?
Use the modulo operator
select * from your_table
where id % 10 = 1
to get 1,11,21,31,... and so on. And
where id % 10 = 2
for 2,12,22,32,....
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Hello I have this array:
$_SESSION['id'] = array();
I would like to select all array ID'S and then select them from the database.
How to do it? I have no idea..
$sql='select name from table where id in ('.implode(",",$_SESSION['id']).')';
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I want to extract each row from a table, but in random order. How can I do that? I tried using rand(), but I was not successful.
My database is named "permis54_permis-online-date" and my table is named: "intrebari".
Use ORDER BY RAND() MySQL:
SELECT column FROM intrebari
ORDER BY RAND()
select * from intrebari order by rand();