The ________ keyword is used to access attributes of preceding tables or subqueries in the from clause.
Question
The ________ keyword is used to access attributes of preceding tables or subqueries in the from clause.
Solution
The keyword you are looking for is "JOIN".
In SQL, the JOIN keyword is used to combine rows from two or more tables based on a related column between them. It's crucial for accessing and managing data from multiple tables within a single query. When you use joins, you can retrieve attributes from different tables or subqueries included in the FROM clause, which allows for more complex data relationships and extraction.
For example, in a SQL query, you might have:
SELECT *
FROM employees
JOIN departments ON employees.department_id = departments.id;
In this case, the JOIN allows access to attributes from both the employees
and departments
tables based on the matching department_id
.
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