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How to Overcome MySQL's GROUP_CONCAT() Length Limitations?

Course Introduction：Overcoming MySQL's GROUP_CONCAT() Length LimitationMySQL's GROUP_CONCAT() function offers a convenient way to concatenate values from multiple...

2024-12-23 comment 0 943

How to Sort Values in GROUP_CONCAT Statements?

Course Introduction：Sorting Values in GROUP_CONCAT StatementsThe GROUP_CONCAT function in MySQL enables you to concatenate values grouped by a specified column....

2024-11-19 comment 0 773

How to Replace MySQL's GROUP_CONCAT with PostgreSQL's STRING_AGG?

Course Introduction：PostgreSQL Alternative to MySQL's GROUP_CONCAT for Combining Field ValuesMySQL's GROUP_CONCAT function allows you to concatenate values from...

2025-01-21 comment 0 1204

How to Get Distinct Values with MySQL's GROUP_CONCAT()?

Course Introduction：MySQL GROUP_CONCAT() Distinct ValuesWhen working with MySQL, it's common to aggregate data using the GROUP_CONCAT() function. However, what if you...

2024-12-08 comment 0 444

How Can I Remove Duplicates from MySQL's GROUP_CONCAT() Results?

Course Introduction：Filtering Duplicates in GROUP_CONCAT() Results Using MySQL's DISTINCTIn database queries, the GROUP_CONCAT() function is frequently used to...

2024-12-10 comment 0 390

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Why does the order change after mysql uses group_concat?

Since the fields in the two tables contain a one-to-many relationship, the group_concat function was used to splice multiple pieces of data when constructing the view to reduce the amount of data. However, after splicing, it was found that the original order had changed. For example: original data: {code ...} Expected result: {code...} Actual result: {code...

2017-05-18 10:49:30

GROUP_CONCAT using the CASE statement can produce multiple outputs.

I have a SQL query that contains the following line of code: GROUP_CONCAT(CASE WHEN t3.ship=1 AND t4.item=0 THEN t2.item_name END ORDER BY item_id SEPARATOR '') AS `MyItemList`. The current output is: Lamp. It's working fine, but I want the item number stored in the item_no column to be displayed in the list. The desired output is: 1. Lamp. I

2023-07-25 08:17:06

If group_concat does not return a value, is there any solution?

I wrote a query to convert several rows into columns based on a condition. However, there are cases where no rows satisfy the condition, but I want some results returned. Below is an example of the table and the results I'm looking for. Source table: idrespondent_id Demographic question answer 11 checked age 3021 empty Master of education 31 checked height 1.8m 41 empty income $151 empty address International Space Station 61 empty talent dance 72 checked age 2082 empty education high school 92 checked height 4m 102 empty income $3.2112 empty Address Gaohai 122 empty talent singing example results after conversion

2023-08-30 19:44:24

SQL - ORDER BY sorting is incorrect

I have a question, it works fine. In the last step, I want it to sort the entire table DESC based on the number of items in the "Item List" column, but it doesn't work. SELECTt8.usernameAS'Username',GROUP_CONCAT(CASEWHENt1.dup=1ANDt2.stat=0ANDt5.item_name='lamp'THENitem_idENDORDERBYitem_idSEPARATOR',')`MyItemL

2023-09-06 18:42:46

Laravel Modal does not return data

I don't know why I'm not getting the value from the modal in my Laravel controller. Please check it for me. However, I use the same code for other modes and controllers. It's working and returning the value from the property without any issues. I'm using Laravel8 and php8.1; below is my code. app\Http\Controllers\Admin\MpdController.phppublicfunctionedit(mpd$mpd){dd($mpd);}app\Mode

2024-03-29 10:31:31

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