Hello since I am new to mysql I have one question regarding selection. I am studying on https://www.w3schools.com/ and practicing on https://www.hackerrank.com/. On hackerrank.com I have a question: Query the list of CITY names starting with vowels (i.e., a, e,…
Let say I have two table with 2 columns : Table A : Job Cost 1 100 1 200 2 100 2 150 2 50 And Table B : Job Sell 1 100 1 100 1 200 2 100 2…
I have a table mytable -- auto-generated definition create table mytable ( id varchar(255) not null, name varchar(255) not null, parent_id varchar(255) null ) collate = utf8mb4_unicode_ci; I want to make parent_id a foreign key to mytable.id create index mytable_parent_id_index…
My Code: function checkLogIn() { var emailValue = document.getElementById("emails").value; var usernameValue = document.getElementById("username").value; var passwordValue = document.getElementById("password").value; knex("users").select("id").where({ email: emailValue, username: usernameValue, password: passwordValue, }); } It should takes values from HTML and compare HTML values with MySQL DB values.…
I want to count some data in a month after a specific date. the table looks like this date user_id tx_id 2022-07-08 123 1 2022-07-08 124 2 2022-07-10 123 3 I want to count every tx_id that user_id number 123…
Trying to select earliest order_date for each customer_id. Using following query SELECT customer_id, order_date FROM Delivery GROUP BY customer_id HAVING MIN(order_date) = order_date But those customer_id with more than one order_date rows are not showing in the result. For example…
I have one table and data in it. Below is the table +----+-------+------+---------+-------------+-----------+ | Id | p_name| grade| promoted| created_on | review_by | +----+-------+------+---------+-------------+-----------+ | 1 | Abc | A | Yes | 2023-Jun-14 | AK | | 1 |…
I'm learning SQL from a website. The question they asked was Show the provinces that has more patients identified as 'M' than 'F'. Must only show full province_name Table My attempted answer using subqueries, rather than join (I am trying…
I want to be able to delete records from a table where ID is from 7970 to 9805 if sales amount is between 200 and 850. I need your help. Thank you in advance. Here's my individual mysql delete statements.…
Fatal error: Uncaught mysqli_sql_exception: Unknown column 'carikrowo' in 'where clause' in C:xampphtdocsData Ipedaproses-login.php:10 Stack trace: #0 C:xampphtdocsData Ipedaproses-login.php(10): mysqli->prepare('SELECT * FROM p...') #1 {main} thrown in C:xampphtdocsData Ipedaproses-login.php on line 10 here is the process-login.php full code <?php session_start(); require_once("database.php");…