Question

In SQL, how are two or more tables joined?

1) By specifying the table names in the WHERE clause and the equality of the respective column names in the GROUP BY clause
2) By using the JOIN keyword and specifying the table names and the equality of the respective column names in the ON clause
3) By using the UNION operator and specifying the table names
4) By using the SELECT statement and specifying the table names in the FROM clause

Answer 1

In SQL, two or more tables are joined using the JOIN keyword and specifying the table names and join conditions in the ON clause. This provides several advantages and simplifies the query syntax.

Step-by-step explanation:

In SQL, two or more tables are joined by using the JOIN keyword and specifying the table names and the equality of the respective column names in the ON clause. The WHERE clause is used to filter the result set, not to specify the join conditions. The GROUP BY clause is used for aggregating data, not for joining tables.

Using the JOIN keyword provides several advantages, such as the ability to join multiple tables at once, specifying different types of joins (e.g., inner join, outer join), and simplifying the query syntax.

I did not switch between tables when answering the question because the correct way to join tables in SQL is by using the JOIN keyword and specifying the table names and join conditions in the ON clause.