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I want to duplicate the last record in my table every minute, i'm using php and mysql.
I can use a cronjob to run it every minute, i know how to do that.
But i don't know how to duplicate the last row, i only have an id that auto_increment and value column.
For example :
Id, Value
10, Green
11, Green
12, Green
13, Green
I think select into is what you are looking for.
https://www.w3schools.com/sql/sql_select_into.asp
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I'm creating a database table for images, but when I am going to insert data(img) above 20 then I can't able to insert data. My table rows only able to insert data only 20. I want insert data number of 30 or 50. So how can I fix this problem.
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So I have this database:
John 4.2
Robert 6
Maria 3.2
What I would want is lets say I refresh a website. And in every refresh I will get a random name from that database based on the chance of showing-> that would mean that Robert would appear more times than the other people(because of his chance)
Any way to do this? I just can't think of anything.
I've create your table with columns name and weight.
The following request return on name, depending on the weight:
SELECT name FROM table ORDER BY RAND()*weight DESC LIMIT 1;
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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 a textarea and I want to insert values of that textarea to a mysql table. But I want to insert each line to each field. Like the textarea has 3 lines...each line should be inserted in 3 each field in the table. Can anyone please help me with this.
Regards,
Explode the value of the textarea (see PHP manual for the syntax of explode). You will end up with a string array with 3 items. Now you can process each of these items individually.
Do you really mean columns (fields) and not rows? If someone enters 100 lines in the textarea you would neet 100 columns. This is considered to be bad data design.
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I'm trying to obtain a column name EmailId from the table named Users. But it returns only the first string and nothing else?
PHP:
$sql="SELECT EmailId FROM Users;";
$result =mysqli_query($conn,$sql);
$col=mysqli_fetch_array($result);
The database has 3 email-ids but count($col) returns only 1. Why so?
Thanks in advance.
The database has 3 email-ids but count($col) returns only 1. Why so?
Because
$col=mysqli_fetch_array($result);
only fetch the first row according to the internal pointer of the dataset, and therefore
count($col)
returns 1 because $col is an array having 1 item.