How to find the same data in certain fields

For example, I want to query only the duplicate data of a certain field in the database. How to query? Or how ...

From [MySQLdiscussion group] 2020-03-13 12:24:57 0  2  1194

#2002 Unable to log in to MySQL server

#2002 Unable to log in to the MySQL server, how to solve this problem? I used phpstudy2018 to build a database...

From [MySQLdiscussion group] 2020-03-12 01:11:20 0  2  1362

How to solve the problem of errors in the cracked version of navicat for mysql downloaded from this website?

The MySQL service cannot be found in the service and cannot be started. What is this error code? The bin folde...

From [MySQLdiscussion group] 2020-03-08 19:46:35 0  1  1110

wempserver, keeps showing yellow?

After changing the port, the red color turned to yellow, Apache was turned on, but SQL could not be started, a...

From [MySQLdiscussion group] 2020-03-08 15:32:28 0  0  1454

How to switch the running mysql version in phpstudy

I want to run mysql5.5. How do I switch this? Guys, hurry, hurry.

From [MySQLdiscussion group] 2020-03-04 22:57:06 0  0  1109

mysqli cannot update data

$sql="UPDATE 'student' SET 'course'='javascript','grade'=88,'WHERE 'id'=3"; prompt after running; co...

From [MySQLdiscussion group] 2020-02-07 15:04:07 0  5  1378

SQL link appears 1130

How to solve the problem of link error 1130

From [MySQLdiscussion group] 2020-02-03 00:50:28 0  1  926

Database creation failed

2020-01-15 03:02:38 MySQL5.7.26 Stopped2020-01-15 03:02:37 MySQL5.7.26 Started2020-01-15 03:02:37 MySQL5.7.26 ...

From [MySQLdiscussion group] 2020-01-15 03:04:50 0  3  1601

php+mysql downloads data in a loop based on ID, each time next

For example, the table content is id name1 a2 b3 c4 d. The first download id is 1. The first download id is 2....

From [MySQLdiscussion group] 2020-01-06 22:14:35 0  3  1126

Data cannot be saved

I read the code carefully and rebuilt the data table, but still can't solve this thorny problem? ? Can any mas...

From [MySQLdiscussion group] 2019-12-11 11:47:07 0  2  1174

Issues with image uploads and thumbnails being stored in the database together with other form data

From [MySQLdiscussion group] 2019-12-08 13:47:57 0  1  1412

Product specification sheet design

I would like to ask the masters: I want to design a product-related table now, which involves multiple specifi...

From [MySQLdiscussion group] 2019-12-06 18:34:33 0  2  1464

Unable to insert data.

var_dump($num); The result is boolean false, which can be inserted by executing the sql statement directly in ...

From [MySQLdiscussion group] 2019-12-03 23:57:20 0  7  1634

character set

It should be mentioned here that mysql's utf8 is not the real utf8. It is a character set within mysql. I want...

From [MySQLdiscussion group] 2019-11-09 09:15:04 0  0  1320

Added header setting: header('Content-type:text/html;charset=uft-8'); error report

After it has been set through the function mysqli_set_charset($conn,'utf8'), add the header setting: header('C...

From [MySQLdiscussion group] 2019-10-21 13:58:59 0  1  1600