Which of the following is true about the result of a sub query?

Which of the following is true about the result of a sub query?

Which of the following is true about the result of a sub-query? The result of a sub-query is generally ignored when executed. The result of a sub-query is used by the main query.

Can subquery retrieve data from a table different from the one in the outer query?

A subquery cannot contain a BETWEEN or LIKE clause. A subquery cannot contain an ORDER BY clause. A subquery in an UPDATE statement cannot retrieve data from the same table in which data is to be updated. A subquery in a DELETE statement cannot retrieve data from the same table in which data is to be deleted.

What’s the difference between a subquery and an inner query?

A subquery is also called an inner query or inner select, while the statement containing a subquery is also called an outer query or outer select. The inner query executes first before its parent query so that the results of an inner query can be passed to the outer query.

When does the subquery execute before the main query?

The subquery (inner query) executes once before the main query (outer query) executes. The main query (outer query) use the subquery result. In this section, you will learn the requirements of using subqueries.

How are multiple column subqueries related in SQL?

Multiple column subqueries : Returns one or more columns. Correlated subqueries : Reference one or more columns in the outer SQL statement. The subquery is known as a correlated subquery because the subquery is related to the outer SQL statement. Nested subqueries : Subqueries are placed within another subquery.

Is the comparison operator the same as a subquery?

The comparison operator can also be a multiple-row operator, such as IN, ANY, or ALL. A subquery is also called an inner query or inner select, while the statement containing a subquery is also called an outer query or outer select.