Question

What is it called when you indicate the table name before the column name in the SELECT clause?

1) Table aliasing
2) Column aliasing
3) Table prefixing
4) Column prefixing

Answer 1

When you indicate the table name before the column name in the SELECT clause, it is called Table prefixing. It helps specify the exact source of the data being selected and avoid ambiguity when multiple tables are involved in the query.

Step-by-step explanation:

When you indicate the table name before the column name in the SELECT clause, it is called Table prefixing. This is done to specify which table the column comes from when multiple tables are involved in the query. It helps avoid ambiguity and specifies the exact source of the data being selected.

One advantage of table prefixing is that it allows you to join tables with the same column names without conflict. For example, if you have a 'name' column in both 'students' table and 'teachers' table, you can differentiate them as 'students.name' and 'teachers.name'.

I did not switch between tables when answering the question above because the question itself was about indicating the table name before the column name in the SELECT clause, which is specific to a single table.