Mysql – How to Get only recent record from the Search Query
I have a search query where I am getting records from 2 tables Table A gives client data , Table B gives transaction number clientdid is PK in table A and FK in table B . I am using left…
Mysql : get column value,explode it and make it ascending and then implode it back and save but through query only
I have a table like this: selprod_id selprod_code 1857 421_92_137_296 1856 421_92_295_137 1855 421_92_296_138 1854 421_92_138_295 1853 421_93_137_296 1852 421_93_137_295 Here selprod_code is a combination of different options. The pattern of creation is: mainProducId_optionId1_optionId2_optionId3_.... so on Now if you look…
How can I implement IGNORE NULLS in window functions such as FIRST_VALUE and LAST_VALUE in MySQL?
How can I implement IGNORE NULLS in window functions such as FIRST_VALUE and LAST_VALUE in MySQL? For example, let's say we have a very simple table called sales. SaleID CustomerID SaleRegion 1 7 CITY A 2 10 NULL 3 10…
Mysql – What is the use of adding length to INT?
I have seen this code in CodeIgniter docs. <?php $fields = [ 'id' => [ 'type' => 'INT', 'constraint' => 5, 'unsigned' => true, 'auto_increment' => true, ], 'title' => [ 'type' => 'VARCHAR', 'constraint' => '100', 'unique' => true,…
mysql max function only returns 1 row
I have the following query to my db: $examCnt = query("select * from apExams"); when I print that out I get: Array ( [0] => Array ( => 2023-08-24 [exam] => 1 [question] => 1 [active] => 0 ) [1]…
Mysql – SQL Update Most Recent Date
I have a table that stores member info. The column 'added' stores the date they joined. View Table I want to get the most recent dates in the added column and update them to a specific date. Sometimes it is…
Mysql query to avoid negative symbol in the output table
Here I have query in which I am trying to avoid the negative symbol in the final output. But why do I get that negative symbol ? I have try to use the replace() but it doesn't work. can you…
Mysql – In knex what is the difference between knex().select("id").from("users) and knex("users").select("id")
/I've already established a connection in knex with mysql and i am trying to do a loginForm connected to mysql db and right now i am doing a login check.I was wondering if there is any difference between this: knex().select("id").from("users)…
Mysql – How to include 0 as count in sql?
Table: Accounts +-------------+------+ | Column Name | Type | +-------------+------+ | account_id | int | | income | int | +-------------+------+ account_id is the primary key (column with unique values) for this table. Each row contains information about the monthly…
How to select a group of columns related to another column in MySQL?
I have a MySQL table containing users, files and file ages as shown below. Users Files File age A 1 42 A 2 17 A 3 4 B 4 85 B 5 73 B 6 11 C 7 6 C…