Sql Programming Tutorials, Guides & Best Practices

Check that the validation system is gone:

SHOW VARIABLES LIKE 'validate_password%';

mysql -u root -p -e "SHOW VARIABLES LIKE 'datadir';"

You should see:

sudo apt install php php-cli php-mbstring php-xml php-bcmath php-curl php-mysql php-zip php-gd php-fpm unzip

Verify the PHP installation:

No preview available for this content.

• JSON_EXTRACT(order_details, '$.quantity'): Extracts the value of the quantity key from the JSON order_details column.
• JSON_UNQUOTE(...): Removes any quotes from the extracted JSON value.
• CAST(... AS UNSIGNED): Converts the extracted value to an unsigned integer to allow for summation.
• SUM(...): Sums all the quantities across the rows.

When you run the above query, MySQL will return the total quantity of products ordered by all customers: