Write SQL queries for data extraction

SQL Query Example for Data Extraction

Here is a generic SQL query template to extract data from {TABLE_NAME} based on the condition {CONDITION}:

Example Scenario

Task: Extract all customer records from the customers table where the country is ‘USA’ and the purchase_date is after ‘2023-01-01’.

SQL Query:

Explanation

1. SELECT *: Selects all columns from the specified table.
2. FROM customers: Specifies the source table for the data (customers in this case).
3. WHERE: Filters rows based on the provided condition:
   • country = 'USA': Retrieves only records where the country is ‘USA’.
   • purchase_date > '2023-01-01': Further restricts results to purchases made after January 1, 2023.
4. Logical Operator AND: Combines multiple conditions that must all be true for a record to be included.