Key column 'users_id' doesn't exist in table and key column 'purchase_id' doesn't exist in table

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CREATE TABLE users (id INT UNSIGNED NOT NULL AUTO_INCREMENT, ign VARCHAR(100), email VARCHAR(255) NOT NULL, password VARCHAR(100) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

CREATE TABLE items(id INT UNSIGNED NOT NULL AUTO_INCREMENT,name VARCHAR(255) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), KEY fk_purchase_id (purchase_id));

CREATE TABLE transaction (id INT UNSIGNED NOT NULL AUTO_INCREMENT, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), KEY fk_user_id (user_id), KEY fk_item_id (item_id));

CREATE TABLE purchase (id INT UNSIGNED NOT NULL AUTO_INCREMENT, price FLOAT NOT NULL DEFAULT 0, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

What I have tried:

CREATE TABLE users (id INT UNSIGNED NOT NULL AUTO_INCREMENT, ign VARCHAR(100), email VARCHAR(255) NOT NULL, password VARCHAR(100) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

CREATE TABLE items(id INT UNSIGNED NOT NULL AUTO_INCREMENT,name VARCHAR(255) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), KEY fk_purchase_id (purchase_id));

CREATE TABLE transaction (id INT UNSIGNED NOT NULL AUTO_INCREMENT, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), KEY fk_user_id (user_id), KEY fk_item_id (item_id));

CREATE TABLE purchase (id INT UNSIGNED NOT NULL AUTO_INCREMENT, price FLOAT NOT NULL DEFAULT 0, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

Posted 4-Apr-22 14:56pm

Andrey Garcia

Updated 4-Apr-22 16:13pm

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M Imran Ansari · Answer 1 · 2022-04-04T16:13:00

Change the sequence of your query and try the following:

SQL

CREATE TABLE users (id INT UNSIGNED NOT NULL AUTO_INCREMENT, ign VARCHAR(100), email VARCHAR(255) NOT NULL, password VARCHAR(100) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

CREATE TABLE purchase (id INT UNSIGNED NOT NULL AUTO_INCREMENT, price FLOAT NOT NULL DEFAULT 0, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id));

CREATE TABLE items(id INT UNSIGNED NOT NULL AUTO_INCREMENT,name VARCHAR(255) NOT NULL, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), FOREIGN KEY fk_purchase_id (id) REFERENCES purchase(id));

CREATE TABLE transaction (id INT UNSIGNED NOT NULL AUTO_INCREMENT, created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (id), FOREIGN KEY fk_item_id (id) REFERENCES users(id));