Given an XML document, write a SQL query to find all the nodes with a given attribute value.
About this solution: The candidate's solution is complete and solves the problem.
The candidate's approach is to use the XMLTABLE function to parse the XML document and return a table of values. The XMLTABLE function takes an XML document and a path expression as arguments. The path expression is used to extract the desired nodes from the XML document. The XMLTABLE function returns a table with a column for each node in the path expression. The XMLTABLE function is used in the FROM clause of the SQL query. The WHERE clause is used to filter the results to only include rows where the value of the attribute is equal to the desired value.
This technical problem involves writing a SQL query to find the average price of all products in a database. An example product table is provided, and the expected output is the average price of all products in the table.
About this solution: This solution is complete and solves the problem. The approach is straightforward and easy to understand.
To get customers who have made a purchase in the last 30 days, write a SQL query that returns all customers with a purchase_date within the last 30 days.
About this solution: The solution above is a good solution that demonstrates a level of completeness and solves the problem. The approach is also good, using the DATE_SUB function to subtract 30 days from the current date. This is optimal because it will always return the correct results, regardless of the current date.